ELECTRIC FURNACE ELECTRIC FURNACES BULLETIN ELECTRIC OVENS KETTLES & MELTERS

E LECTRIC F URNACES ELECTRIC OVENS KETTLES & MELTERS Designing and Manufacturing Electrically Heated Process Equipment SINCE 1927 ELECTRIC FURNACES...
Author: Lorin Logan
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E LECTRIC F URNACES ELECTRIC OVENS

KETTLES & MELTERS

Designing and Manufacturing Electrically Heated Process Equipment SINCE 1927

ELECTRIC FURNACES BULLETIN

F&F ® HEATING ELEMENTS & RACKS

PLUG HEATERS

ELECTRIC JACKETS

IMMERSION HEATERS HL SERIES FURNACE FINTUBE HEATERS

STRIP HEATERS

CONVEYOR OVENS & FURNACES

H Series Box Furnace

CARTRIDGE HEATERS

TUBULAR HEATERS

201 Leverington Avenue, Philadelphia, PA 19127 Toll Free: 800.544.TRENT Website: www.trentheat.com

HOT PLATES

Fax: 215.482.9389 E-mail: [email protected] CERAMIC RING HEATERS

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201 Leverington Avenue Philadelphia, PA 19127 Phone: 215.482.5000 Fax: 215.482.9389 Website: www.trentheat.com E-mail: [email protected]

TABLE OF CONTENTS

PAGE TRENT ELECTRIC FURNACES A History of Outstanding Quality Basic Electric Furnace Design Heating Element Selection Advantages of TRENT Folded and Formed® Heating Elements Furnace Control LABORATORY FURNACES Horizontal Tubular Furnaces LFH Series - 2000°F (1093°C) Pit or Crucible Furnaces LFV Series - 2000°F (1093°C) Bench Type Box Furnaces M2-DKR Series - 2500°F (1371°C) HL Series - 2000°F (1093°C) POT FURNACES PF Series - 1400°F (760°C) Trough Furnace TFL/TF Series - 1700°F (927°C) PIT FURNACES Radiant Heat PT Series - 1850°F (1010°C) VR Series - 2000°F (1093°C) Vertical Air Recirculation - Top to Bottom M2-CAH Series - 1400°F (760°C) BELL FURNACES BA Series - 1850°F (1010°C) BOX FURNACES Radiant Heat H Series - 1850°F (1010°C) HM Series (Muffle Design) - 1900°F (1038°C) Horizontal Air Recirculation - Front to Back GF Series - 1400°F (760°C) GFH Series (Muffle design) - 1750°F (954°C) High Temperature Box Furnaces SCR Series - 2500°F (1371°C)

2 2 2 2 3

4 5 6 7 8 9

10 11 12

13

14 15 16 17 18

FURNACE QUOTATION QUESTIONNAIRE

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201 Leverington Avenue Philadelphia, PA 19127 Phone: 215.482.5000 Fax: 215.482.9389 Website: www.trentheat.com E-mail: [email protected]

TRENT ELECTRIC FURNACES A HISTORY OF OUTSTANDING QUALITY

There are three basic types: round rod; flat ribbon; and formed or curved ribbon types, all shown in Fig.1.

Since 1927, TRENT, Incorporated has been one of the pioneers in electrically heated industrial equipment. All TRENT furnaces and ovens have been carefully engineered, and tested to meet the stringent requirements of industrial and governmental customers. The company’s expertise has been focused exclusively on electrically heated equipment and at no time has combustion equipment been built. The value of nearly eight decades of such experience cannot be underestimated. The heat treatment of metals and other materials is a precise process, and requires the proper heat treating equipment to achieve uniform results consistently. BASIC ELECTRIC FURNACE DESIGN

The Rod type has excellent rigidity due to the physical construction, but requires refractory backing plates to dissipate the heat from the element so its effective radiating surface can be increased. The standard Flat Ribbon has a good radiating surface, but needs considerable thickness for support. Both the rod and the standard flat ribbon type elements require auxiliary spacers between turns to prevent creep and springing. These spacers limit the unit coverage per square foot of area. It is usually necessary to have a relatively heavy cross section in the above units to give the required rigidity. Electrical resistance is naturally lower in the above types of elements requiring costly voltage reducing transformers for both

There are three basic types of electric furnaces: Box type for hardening; Air Circulation Type, for annealing or drawing; and Salt Bath for carburizing, hardening and tempering. One linear inch of ribbon A or B has 2 sq, inches of radiating surface

The some of the advantages electrically heated furnaces have over combustion type furnaces are as follows: 1.

.0159"

1" FLAT RIBBON

A

.25"

Temperature uniformity in the furnace results in greater uniformity of products. .637"

2.

Closer control makes possible very accurate duplication of results.

3.

Absence of combustion products results in superior quality in many processes.

4.

Maintenance costs are lower with shorter production shutdown periods.

5.

FORMED RIBBON

B

One linear inch of rod C has 0.446 sq, inches of radiating surface

.142" DIA.

ROD OF SAME CROSS SECTIONAL AREA

C

Greater flexibility of the electric furnace permits more efficient use of various operations.

FIG. 2 FIG.1

small and medium size furnaces.

TRENT Folded and Formed® Heating Elements

Since electric furnaces are clean and well insulated, many heat treating operations can be carried out in the machine shop, tool room, or in the production line, where combustion furnaces might not be satisfactory.

The fundamental engineering principles of TRENT furnaces and ovens are the same today as they were in the early units. This includes the compact design, and TRENT’s innovative Folded and Formed® (F&F®) metallic resistor heating element design, which are incorporated in most of the TRENT furnaces.

The FOLDED and FORMED® heating element, developed and created by TRENT, Inc., are made from flat ribbon, folded into return bends and then formed or curved to give physical rigidity. They are supported in position inside the furnace by refractory porcelains which are keyed and mounted to the brick chamber liner as shown in Fig. 2. The multiple row design of TRENT FOLDED and Formed® heating elements permits selective replacements for lower maintenance costs and shorter production down time. ADVANTAGES OF TRENT FOLDED & FORMED® HEATING ELEMENTS

HEATING ELEMENT SELECTION The heart of an electric furnace is the heating elements, and in selecting the type and form of heating elements, careful consideration must be given to construction and shape.

The advantage of rod type elements is strength. The advantage of flat ribbon is its greater surface area for use in dissipating heat generated without backing plates. Through the process of forming flat ribbon, the FOLDED and

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TRENT ELECTRIC FURNACES

201 Leverington Avenue Philadelphia, PA 19127 Phone: 215.482.5000 Fax: 215.482.9389 Website: www.trentheat.com E-mail: [email protected]

FORMED® element develops a strength found greater than rod by test, because of greater cross sectional inertia. Since F&F® heating elements is made from flat ribbon, it has the greater radiating area of flat ribbon, hence this element offers both major advantages of its counterparts. As mentioned before, a ribbon type element has a greater surface area for a given cross section than a rod type, and the TRENT FOLDED and FORMED® element has this advantage combined with the added support feature. The conventional ribbon type element is generally mounted edgewise against the furnace wall with the strands close together resulting in inner radiation which raises the temperature of the element. The TRENT F&F® element, on the other hand, is folded so that the concave side of the ribbon is facing the furnace charge. This allows the heat to get away from the unit, lowers the unit temperature, and thus increases unit life. As shown in Figure 1, the FOLDED AND FORMED® element is only a fraction of the thickness of rod type furnace elements, but is formed to give even greater strength. This thinner cross section of the element raises the resistance of the circuit and permits the operation of most furnaces directly on line voltage, thus eliminating costly transformer. The TRENT F&F® element is fabricated from wrought alloy having a composition of 80% nickel and 20% chrome with less than 1% iron as an impurity. This has long been recognized by furnace manufacturers as the best alloy used in electric furnaces for sustained temperatures of 1850°F or for short periods up to 2000°F.

FIG.3 given wattage and more rigid than the rod type due to a special forming operation shown in Fig. 1[B]. It can be readily seen that this unit has advantages over both the rod element and the standard flat ribbon element. Auxiliary backing refractory porcelain plates are not necessary, and the resulting heat lag is eliminated. When a heating element of the ribbon type or rod type is over .0625“ in thickness or diameter, the temperature gradient between the surface of the element and the inside becomes appreciable. This condition will accelerate burn-outs should the element be operated at too high a temperature for a long period of time. In comparing a standard ribbon 1” wide x .0159” thick as shown in Fig. 1[A] to a rod of the same cross sectional area (Fig. 1[C]) results in a rod diameter of .142”; the rod is nine times thicker than the ribbon and has less than one-fourth of the radiating area. When FOLDED and FORMED® ribbon is made by the TRENT method, it has greater strength than either the rod or the flat ribbon unit, and is strong enough to be self-supporting. The greater surface area obtained with a formed ribbon element will give better heat transfer from the unit to the surrounding air by convection, conduction, and radiation, without the aid of special refractory plated or backing plates. FIG 3 shows typical sections of F&F® heating elements supported against the lining of the furnace chamber by H shaped refractory porcelains. This example also shows that, when the heat is not radiated directly to the work in the furnace, the element heats the surface of the firebrick insulation, which, in turn, radiates the heat onto the workload, creating a uniform blanket of heat on all walls.

Fig. 2

FURNACE CONTROL This unit is manufactured from standard ribbons using thicknesses between fifteen and thirty thousands of an inch, permitting the unit to be light in weight, and resulting in reduced furnace heat-up time.

A control system must be selected based on the requirements of the process. Anything from a basic cost effective on/off control to a SCR package, which has been proven to be efficient and effective, can be provided to meet your needs.

The FOLDED AND FORMED® units are lighter in weight for any 7-2005

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LABORATORY FURNACES HORIZONTAL TUBULAR FURNACES LFH Series --- 2000°F (1093)°C Max.

Ceramic Core

Heating Element

201 Leverington Avenue Philadelphia, PA 19127 Phone: 215.482.5000 Fax: 215.482.9389 Website: www.trentheat.com E-mail: [email protected] Brick Insulation Powder Type Insulation

Coiled Heating Element

TRENT Horizontal Tubular Furnaces are used for carbon determination in steel and other combustion analysis. The furnace has a refractory tube with a helical heating element coil and is well insulated. The ends of the furnace are made of insulating brick, firmly held in position by a steel casing. The outer casing is carbon steel and so arranged that the distance from the center of the furnace to the base is 10”. Temperature is controlled by a manually set rheostat so the temperature can be held at the desired level.. Automatic controls are available.

Work Chamber

Terminal Block Ceramic Core

Schematic View --- Cutaway Section LFH Oven Series

STANDARD FEATURES:

§ § § § § §

Standard parts requiring little or no maintenance. Insulated with fire brick and powder type. Rugged construction for industrial applications. Openings at one or both ends if desired. Carbon steel outer casing. Long life helical coil heating elements wound around and cemented to a horizontal alundum core chamber.

LFH-236 Series Tubular Furnace

OPTIONS:

§ § § §

Fused safety disconnect switch and control instruments as required. Standard NEMA and UL listed switchgear and control panel for remote mounting by user. Control instruments as required. Thermocouple mounted to the furnace exterior with sensing probe entering the chamber trough the insulation and ceramic core.

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LFH Series --- Standard Sizes --- 2000°F (1093°C) Maximum Type

Watts

Volts*

Chamber Size Diameter Length

W

Outside H

LFH-112 550 120/240 1-¼" 12" 9-¼" 14-9/16" LFH-118 825 120/240 1-¼" 18" 9-¼" 14-9/16" LFH-124 1100 120/240 1-¼" 24" 9-¼" 14-9/16" LFH-136 1650 120/240 1-¼" 36" 9-¼" 14-9/16" LFH-212 1200 120/240 2" 12" 9-¼" 14-9/16" LFH-218 1800 120/240 2" 18" 9-¼" 14-9/16" LFH-224 2400 120/240 2" 24" 9-¼" 14-9/16" LFH-236 3600 120/240 2" 36" 9-¼" 14-9/16" LFH-312 1500 120/240 3" 12" 9-¼" 14-9/16" LFH-318 2250 120/240 3" 18" 9-¼" 14-9/16" LFH-324 3000 120/240 3" 24" 9-¼" 14-9/16" LFH-336 3750 120/240 3" 36" 9-¼" 14-9/16" LFH-424 3600 120/240 4" 24" 11-¼" 16-9/16" LFH-436 5400 120/240 4" 36" 11-¼" 16-9/16" LFH-524 4500 120/240 5" 24" 12-¼" 17-9/16" LFH-536 6700 120/240 5" 36" 12-¼" 17-9/16" LFH-624 5400 120/240 6" 24" 13-¼" 18-9/16" LFH-636 8100 120/240 6" 36" 13-¼" 18-9/16" LFH-648 10800 120/240 6" 48" 13-¼" 18-9/16" * Voltages listed are not dual voltages. All furnaces are single-phase service

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D† 15-1/8" 21-1/8" 27-1/8" 39-1/8" 15-1/8" 21-1/8" 27-1/8" 39-1/8" 15-1/8" 21-1/8" 27-1/8" 39-1/8" 27-1/8" 39-1/8" 27-1/8" 39-1/8" 27-1/8" 39-1/8" 51-1/8"

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201 Leverington Avenue Philadelphia, PA 19127 Phone: 215.482.5000 Fax: 215.482.9389 Website: www.trentheat.com E-mail: [email protected]

LABORATORY FURNACES

TRENT laboratory furnaces are small bench or stand type intermittent duty furnaces. Small quantities of materials may be processed in these furnaces, but they are primarily used for pilot or test operations. The furnaces are designed to operate under natural atmosphere and laboratory conditions, unless specifically modified. Coiled Brick Cover

PIT or CRUCIBLE FURNACES --LFV Series --- 2000°F (1093°C) Max.

Heating Element

Ceramic Core

Crucible Furnaces are ideal for heat treating small quantities of material, ash determination, melting white metal, and thermocouple calibration. The outer casing is made of carbon steel. The helically coiled heating element is wound on a spiral form and cemented in place with a powder type insulation. The brick cover can be drilled for insertion of a thermometer or thermocouple.

Powder Type Insulation

Temperature is controlled by a manually set rheostat so the temperature can be held at the desired level.. Automatic controls are available.

Graphite Crucible

Terminal Block

Brick Insulation

LFV Series Furnace

STANDARD FEATURES:

§ § § § § § § §

Rugged construction for industrial applications.

OPTIONS: § Fused safety disconnect switch and control instruments as required. § Standard NEMA and UL listed switchgear and control panel for remote mounting by user. § Control instruments as required.

Brick type cover.

§

Standard parts requiring little or no maintenance. Vertically set alundum core. Insulated with fire brick and powder type.

Carbon steel outer casing. painted with a heat resistant paint. Long life helical coil heating elements wound around and cemented to a vertically set alundum core chamber. Graphite crucible

Thermocouple mounted to the furnace exterior with sensing probe entering the chamber trough the insulation and ceramic core.

LFV Series --- Standard Sizes --- 2000°F (1093°C) Maximum Type

Watts

Volts*

Chamber Size Diameter Depth

Outside Diameter Depth

LFV-3 750 120 3-½" 5" 10-¼" LFV-4 750 240 3-½" 5" 10-¼" LFV-5 1250 120 5" 5" 11-¾" LFV-6 1250 240 5" 5" 11-¾" * Voltages listed are not dual voltages. All furnaces are single-phase service

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12-3/8" 12-3/8" 12-3/8" 12-3/8"

Crucible Size Diameter Depth 2-½" 2-½" 3-¼" 3-¼"

3" 3" 4" 4"

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201 Leverington Avenue Philadelphia, PA 19127 Phone: 215.482.5000 Fax: 215.482.9389 Website: www.trentheat.com E-mail: [email protected]

LABORATORY FURNACES BENCH STYLE BOX FURNACES Type M2-DKR --- 2500°F (1371)°C Max. The TRENT M2-DKR High Temperature Furnace is designed to operate at temperatures up to 2500°F. The outer casing is reinforced welded carbon steel, lined with two grades of laminated, high temperature insulation. The heating elements are silicon Carbide type resistors located beneath a ceramic hearth plate. These elements are connected in series for 240 volt operation or used in parallel for 120 volt operation.

High Temperature Brick and Laminated Insulation Counterweighted Door

The brick-lined furnace chamber reflects heat, radiating it into the charge. This also aids in maintaining fine temperature distribution throughout the furnace. With the heating elements located beneath the hearth, they are protected against scale and accidental breakage.

Terminal Box

Silicon Carbide Rod Type Heating Elements

The door is a counter-weighted, vertical lift type to provide a tight seal with the brick lined furnace front.

Silicon Carbide Hearth Plate

M2-DKR Type Furnace The general design is compact and lends well to bench mounting in laboratories. An automatic, indicating, controlling type temperature instrument is usually supplied with a magnetic contactor, and platinum rhodium type thermocouple. The temperature control instrument is usually for remote mounting by the user.

STANDARD FEATURES:

OPTIONS:

§ § § § §

§ §

§ §

Standard parts with little or no maintenance required. 4-½" of brick backed by 2” of slab type secondary insulation. Rugged steel construction for most industrial uses. Silicon carbide type hearth plate. Vertical lift, counter-weighted door for quick access to work chamber. Heating elements are silicon carbide type resistors located beneath the hearth plate for long life. Built for bench mounting, without legs.

§ §

Fused safety disconnect switch. Standard NEMA and UL listed switchgear and control panel. Control instruments as required. Special purpose accessories.

M2-DKR Series --- Standard Sizes --- 2500°F (1371°C) Maximum Type

kW

M2-DKR 4.5 * Dual Voltage furnace.

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Volts*

PH.

W

120/240

1

8"

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Inside H

D

5" 14" One Size available.

W

Outside H

D

25"

31"

38"

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LABORATORY or TOOL ROOM FURNACES

201 Leverington Avenue Philadelphia, PA 19127 Phone: 215.482.5000 Fax: 215.482.9389 Website: www.trentheat.com E-mail: [email protected]

BENCH STYLE BOX FURNACES Type HL --- 2000°F (1093)°C Max. TRENT HL TYPE Furnaces is designed to operate at temperatures up to 2000° and intermittently to 2200°F. The outer casing is reinforced welded carbon steel, lined with two laminated layers of high grade brick and slab type insulation. The heating elements are ® TRENT FOLDED and FORMED exposed ribbon type heating elements, supported by ceramic retainers that are keyed into the brick lined furnace chamber. The F&F® heating elements are located on both sides, top and bottom of the furnace chamber. The bottom elements are located beneath a ceramic hearth plate which protects them against scale and accidental breakage. These elements are connected in series for 240 volt operation or used in parallel for 120 volt operation.

HL SERIES FURNACE

The brick-lined furnace chamber reflects heat, radiating it into the charge. This aids in maintaining fine temperature distribution throughout the furnace. The door is a hinged, fast-action, over-lapping, plug type to provide a tight seal with the brick lined furnace front. The general design is compact and lends well to bench mounting in laboratories. An automatic, indicating, controlling type temperature instrument is usually supplied with a magnetic contactor, and platinum rhodium type thermocouple. The temperature control instrument is usually for remote mounting by the user.forced through ducts along the sides of the work chamber; Heating elements are located inside the ducts. After passing over the heating elements, the heated air moves into the work chamber at the front of the oven and again passes through and over the work load.

STANDARD FEATURES:

OPTIONS:

§ §

§

§ § § §

§

Standard parts with little or no maintenance required. Fire brick chamber liner backed by slab type secondary insulation. Rugged steel construction for most industrial uses. Silicon carbide type hearth plate with side rails. Fast-action, drop down, over-lapping plug type door with counterweight.for quick access to work chamber. TRENT Folded and Formed® heating elements supported by ceramic retainers that are keyed into the brick lined furnace chamber. Built for bench mounting, without legs.

§ § § § §

Silicon carbide muffle with openings at both ends in lieu of the hearth plate. Control thermocouple mounted to the furnace. Fused safety disconnect switch. Standard NEMA and UL listed switchgear and control panel. Control instruments as required. Special purpose accessories.

HL Series --- Standard Sizes --- 2000°F (1093°C) Maximum † Type

kW

Volts

PH.

W

HL-4 4 240 1 8-¼" HL-6 16 240 1 11-¼" † Furnace can be operated intermittently to 2200°F (1204°C).

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Inside H 5-¼" 8-¼"

D

W

Outside H

D

16-¼" 20" 25-½" 29" 24" 28" 37" 39" Larger Custom Sizes are available.

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POT TYPE FURNACES PF Series --- 1400°F (760°C) Max. TRENT Pot Furnaces are used in the metal working industry for lead hardening, case hardening, drawing, tempering, annealing, brazing, pre-heating and carbonizing through the use of a wide choice of salts available. Pot furnaces eliminate the atmosphere problem by excluding it; therefore, scaling, oxidation and de-carbonization are avoided without the necessity of costly atmosphere equipment. The furnace is designed so that radiant heat is uniformly applied to the outside of the pot. This increases pot life as compared to localized hot spot heating in combustion type furnaces. The molten bath furnace is considered superior to radiant heat methods by many experts because it usually gives a faster, more uniform heat application by conduction than is possible using radiant heat.

Split Swing Cover on Larger Models

Folded and Formed® Heating Elements

STANDARD FEATURES: § § §

§

§ §

§

Standard parts with little or no maintenance required. Laminated fire brick chamber liner and throat backed by slab type secondary insulation. All Pots to have flange and skirt with gasket seal to prevent seepage of the salt into the furnace chamber and are constructed of pressed steel, inconel or stainless steel with dished or flat bottom depending on furnace size and temperature. NOTE: Inconel pots used with neutral salts are not guaranteed. TRENT Folded and Formed® heating elements supported by ceramic retainers that are keyed into the brick-lined furnace chamber sidewalls. No heating elements are located on the bottom of the chamber One-piece lift-off type cover on Model PF-500 and smaller. Split swinging covers on Model PF-1000 and larger. One sheathless type thermocouple for heat chamber control and one alloy sheathed thermocouple in the pot proper. One sheathless thermocouple for furnace overtemperature control or one gold fuse which melts at 1940°F (1060°C) for furnace over temperature protection in stainless steel and inconel vessels.

One Piece Lift-off Cover on Smaller Models (NOT SHOWN)

High Temperature Insulation

Vessel

Schematic View --- Cutaway Section PF Furnace Series

PF Series --- Standard Sizes --- 900°F (482°C) or 1700°F (927)°C Type

Kw

Volts*

PH.

PF-50 1.9 120 1 PF-100 6.5 120 1 PF-200 7.3 120 1 PF-500 13 120/240 3/1 † PF-1000 17 120/240 3/1 † PF-1500 21 240/480 3/1 ¤ PF-1600 24 240/480 3 PF-1900 27 240/480 3 PF-2500 27 240/480 3 PF-3500 36 240/480 3 PF-5000 42 240/480 3 • 1600°F (871)°C for neutral salts applications. † 12O Volt, 3-Phase or 240 Volt, Single-Phase

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Pot Size Diameter Depth

Outside Diameter Height

5" 6" 15" 18" 6" 12" 24" 26" 8" 14" 27" 26" 10" 18" 29" 32" 12" 24" 32" 33" 16" 24" 42" 38" 18" 20" 42" 38" 16" 30" 36" 47" 20" 24" 44" 45" 24" 24" 48" 45" 24" 30" 48" 52" * Voltages listed are not dual voltages. ¤ 240 Volt, 3-Phase or 480 Volt, Single-Phase

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OPTIONS: § §

§

§

Fused safety disconnect switch. Standard NEMA and UL listed switchgear and control panel. Electronic Control instrument and product over temperature protection as required. Special purpose accessories.

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TROUGH FURNACES Insulated Roller Type Cover

TF/TFL Series --- 1700°F (927°C) Max. TRENT Trough Furnaces are similar to the pot type PF series. With a 1700°F (927°C) maximum temperature, the TF/TFL series is offered with the standard features listed below with optional extras available.

STANDARD FEATURES: § § §

§

§ §

§

Standard parts with little or no maintenance required. Laminated fire brick chamber liner and throat backed by slab type secondary insulation. All Pots to have flange and skirt with gasket seal to prevent seepage of the salt into the furnace chamber and are constructed of pressed steel, inconel or stainless steel depending on the operating temperature. TRENT Folded and Formed® heating elements supported by ceramic retainers that are keyed into the brick-lined furnace chamber sidewalls. No heating elements are located on the bottom of the chamber One-piece insulated manually operated cover mounted on rollers for easy opening and closing. One sheathless type thermocouple for heat chamber control and one angle type alloy sheathed thermocouple in the pot proper. One sheathless thermocouple for steel vessel furnace over temperature control or one gold fuse which melts at 1940°F(1060°C) for furnace over temperature protection in stainless steel and inconel vessels.

High Temperature Brick and Laminated Insulation Vessel

Folded and Formed® Heating Elements on All Sidewalls

OPTIONS: § § § §

Fused safety disconnect switch. Standard NEMA and UL listed switchgear and control panel. Electronic Control instrument and product over temperature protection as required. Special purpose accessories. TF Series Trough Furnace

TFL TF Series --- Standard Sizes --- 1700°F (927°C) Maximum kW Type

Volts*

PH.

W

TFL-13 10 7.5 240 TFL-18 36 24 240/480 TFL-34 40 33 240/480 TFL-48 40 30 24/0480 TF-20 20 240 TF-30 27 240 TF-40 33 240/480 TF-50 40 240/480 TF-60 46 240/480 TF-88 70 240/480 * Voltages listed not dual --- specify. † 12O Volt, 3-Phase or 240 Volt, Single-Phase

1 3 3 3 1 3 3/1 † 3 3 3

13" 30" 30" 48" 20" 30" 40" 50" 60" 88"

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900°F

1700°F

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Inside H

D

W

Outside H

13" 10" 32" 32" 18" 18" 48" 36" 21" 34" 53" 44" 20" 20" 70" 43" 12" 18" 44" 36" 12" 18" 54" 36" 12" 18" 64" 36" 12" 18" 74" 36" 12" 18" 84" 36" 12" 18" 107" 36" Larger custom sizes can be quoted.

D 30" 42" 52" 42" 40" 44" 44" 44" 44" 44"

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PIT FURNACES

PT Series --- 1850°F (1010°C) Max. The TRENT Pit Type Furnace is used for heat treating of ferrous and non-ferrous metals, firing of ceramics, annealing of glassware, processing of chemicals and general research purposes. It has the same design features as the Pot Type Furnace with the exception that no pot is included. High alloy metallic guards are placed over the heating elements to prevent damage while loading. Standard furnace is available for operating temperatures of 1850°F. Furnaces with operating temperatures of 2150°F. are available as an option.

STANDARD FEATURES: § § § § § §

Split Swing Cover

Alloy Heating Element Guards

High Temperature Insulation Folded and Formed® Heating Elements

Standard parts with little or no maintenance required. Schematic Views --- Cutaway Section Fire brick chamber liner and throat backed by slab type secondary insulation. PT Furnace Series PT Series Furnaces have no retort or pot and are complete with high alloy metal guards in the furnace chamber to prevent heating element damage when loading. TRENT Folded and Formed® heating elements supported by ceramic retainers that are keyed into the brick-lined furnace chamber. PF-Series Furnaces have one-piece lift-off type cover on Model PF-500 and smaller. Split swinging covers on Model PF-1000 and larger. One thermocouple for heat chamber control.

OPTIONS: § § § §

Fused safety disconnect switch. Standard NEMA and UL listed switchgear and control panel. Electronic Control instrument and product over temperature protection as required. Special purpose accessories.

PT Series -- Standard Sizes -- 1850°F (1010°C) Continuous Rating or 2150° (1177°C) Intermittent Rating on Request Type

Kw

Volts*

PH.

Work Chamber Outside Diameter Depth Diameter Height

PT-50 1.9 120 1 6" PT-100 6.5 120 1 7" PT-200 7.3 120 1 12" PT-500 13 120/240 3/1 † 12" PT-1000 17 120/240 3/1 † 14" PT-1600 24 240/480 3 21" PT-1900 27 240/480 3 18" PT-2500 27 240/480 3 23" PT-3500 36 240/480 3 27" PT-5000 42 240/480 3 27" * Voltages listed are not dual voltages --- specify. † 12O Volt, 3-Phase or 240 Volt, Single-Phase ¤ 240 Volt, 3-Phase or 480 Volt, Single-Phase

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8½" 27½" 18" 16" 28½" 26" 16" 34" 26" 22" 34" 32" 24" 36" 33" 25" 42" 38" 29" 40" 47" 25" 44" 45" 25" 49½" 45" 32" 49½" 52" Larger Sizes are available.

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VERTICAL RETORT FURNACES VR Series --- 2000°F (1093°C) Max.

Insulated Retort Cover

The TRENT Vertical Retort Furnace employs the same basic design features as the TRENT Pot Type Furnace with the exception that a high alloy gas tight retort is substituted for the salt pot. This retort is complete with insulated cover containing thermowell, gas inlet and outlet. The furnace is used primarily in metal working industry for such operations as sintering, brazing, annealing, etc., under controlled atmospheres. It is also used in research facilities for numerous purposes. RETORT OPERATION CONTROL A controlling pyrometer thermocouple is placed in the furnace heating chamber. Another thermocouple is placed in the retort thermowell. Each thermocouple is wired to a separate control instrument. Both controller contacts are wired in series so that if heat chamber temperature approaches set temperature before the material in the retort comes to temperature. The heat chamber temperature is controlled until the material in the retort comes to temperature. At that point, the retort control takes over. This system prevents damage to heating elements from over-temperature in heating chamber and insures a maximum safe heating rate.

Atmosphere Inlet

High Temperature Insulation

Thermowell

Atmosphere Outlet

Alloy Retort Folded and Formed® Heating Elements

Schematic Views --- Cutaway Section VR Furnace Series

STANDARD FEATURES: § § § § § § §

Standard parts with little or no maintenance required. Fire brick chamber liner and throat backed by slab type secondary insulation. VR Series Furnaces have a full weld gas tight retort with a black heat absorbent coating, mounting flange and flat bottom. TRENT Folded and Formed® heating elements supported by ceramic retainers that are keyed into the brick-lined furnace chamber. VR-Series Furnaces have a fully insulated cover complete with atmosphere inlet, atmosphere outlet and thermowell. One thermocouple for heat chamber control. One thermocouple mounted in the retort thermowell.

OPTIONS: § § § §

Fused safety disconnect switch. Standard NEMA and UL listed switchgear and control panel. Electronic Control instrument and product over temperature protection as required. Special purpose accessories.

VR Series --- Standard Sizes --- 2000°F (1093°C) Type

Kw

Volts*

PH.

Retort Size Diameter Depth

Outside Diameter Height

VR-50 1.9 120 1 5" 6" 15" 18" VR-100 6.5 120 1 6" 12" 24" 26" VR-200 7.3 120 1 8" 9" 27" 26" VR-500 13 120/240 3/1 † 10" 13" 29" 32" VR-1000 17 120/240 3/1 † 12" 21" 32" 33" VR-1500 21 240/480 3/1 ¤ 16" 21" 42" 38" VR-1600 24 240/480 3 18" 15" 42" 38" VR-1900 27 240/480 3 16" 25" 36" 47" VR-2500 27 240/480 3 20" 19" 44" 45" VR-3500 36 240/480 3 24" 19" 48" 45" VR-5000 42 240/480 3 24" 25" 48" 52" * Voltages listed are not dual voltages --- specify w ith order. † 12O Volt, 3-Phase or 240 Volt, Single-Phase ¤ 240 Volt, 3-Phase or 480 Volt, Single-Phase

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AIR DRAW or PIT FURNACES VERTICAL AIR RECIRCULATION

201 Leverington Avenue Philadelphia, PA 19127 Phone: 215.482.5000 Fax: 215.482.9389 Website: www.trentheat.com E-mail: [email protected] Insulated Cover with Lift-Swing Handle

M2-CAH Series --- 1400°F (760°C) Max. The TRENT M2-CAH Series Air Draw or Vertical Pit Furnace is designed to meet the demands of the Heat Treating Industry for a precise and efficient furnace for drawing, tempering and annealing at temperatures up to 1400’F. The M2-CAH Design satisfies the industry requirements of space economy, acquisition economy, rugged construction and precise duplication of results in each processed batch.

High Temperature Insulation

Folded & Formed®

The M2 design embodies an upper work chamber and lower fan chamber beneath Heating Elements this work chamber. The exterior furnace shell is of heavy gauge carbon steel and painted with a heat resistant paint. The entire furnace is insulated with high grade Alloy Steel Work Basket with Solid brick for the chamber liner, backed by courses of medium temperature insulating Sides slabs for minimum heat loss and lower outer casing temperature. The heating elements are TRENT FOLDED & FORMED® alloy ribbon type located only on the Heavy Screen side walls of the upper or work chamber and mounted to ceramic element retainBasket Bottom ers that are keyed to the brick chamber liner. In the lower chamber a plug type high temperature alloy blade fan is mounted, powered by a heavy duty indirect drive Alloy Steel motor mounted to furnace legs. A fixture support jig of alloy construction which Recirculating supports the load basket is located above the fan. The load basket is also alloy Fan construction and has solid metal sides and a heavy duty screen bottom. The solid metal load basket sides serve a dual purpose; to diffuse the direct radiant heat and Fan Motor prevent it from coming into direct contact with the work load proper and also to act as the air recirculation channel wall. The air recirculation pattern is such that air enters the work basket at the top, passes downward through the load, through the Air Draw Furnace basket screen and sucked into the fan, which then expels the air sideways into the entire annular space surrounding the fan in the lower chamber. The pressure forces the air upwards along the side walls of the fan chamber and then into the space between the load basket and upper chamber sidewalls where the FOLDED & FORMED® heating elements are located. As the air passes thru this space it is continuously reheated prior to its re-entrance into the work basket at the top. Alloy baffles are employed where required to afford uniformity of air flow. The furnace is delivered with control thermocouple installed. Add your own control package or let TRENT configure one for you

STANDARD FEATURES: § § § § § § § § §

§

Standard parts with little or no maintenance required. Laminated fire brick chamber liner and throat backed by slab type secondary insulation. Rugged steel construction for industrial use. Forced vertical air circulation, top to bottom. Two chamber construction with upper work chamber and lower fan section. Stainless steel interior, air flow baffles and work chamber base to support the stainless steel load basket. Insulated, arm mounted, manual-lift swing cover. Indirect drive fan motor and removable plug type stainless steel fan. TRENT Folded and Formed® heater racks for long life and closer temperature control.

§

Door switch to shut off the fan and heaters when the cover is raised. Control thermocouple installed.

OPTIONS: § § § § § §

Fused safety disconnect switch. Standard NEMA and UL listed switchgear and floor mounted control panel for mounting beside the furnace. Control instrument as required. Air cylinder operation of cover lift with manual swing away of cover. Non-explosive atmosphere operating feature. Special purpose accessories.

M2-CAH Series --- Standard Sizes --- 1400°F (760°C) Maximum Type

Watts

Volts*

PH.

Chamber Size Diameter Depth

M2-CAH-1818 20 240/480 3 M2-CAH-2226 40 240/480 3 M2-CAH-2230 40 240/480 3 M2-CAH-2236 45 240/480 3 M2-CAH-2248 55 240/480 3 M2-CAH-3336 60 240/480 3 M2-CAH-3348 75 240/480 3 * Voltages listed are not dual voltages --- specify w ith order.

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18" 22" 22" 22" 22" 33" 33"

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18" 26" 30" 36" 48" 36" 48"

Outside Diameter Depth 47" 53" 53" 53" 53" 65" 65"

92" 102" 106" 115" 128" 119" 131"

Fan Motor 1 HP 2 HP 2 HP 3 HP 3 HP 5 HP 5 HP

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201 Leverington Avenue Philadelphia, PA 19127 Phone: 215.482.5000 Fax: 215.482.9389 Website: www.trentheat.com E-mail: [email protected]

BELL TYPE FURNACES BA Series --- 1850°F (1010°C) Max. Continuous --- 2100°F (1149°C) Max. Intermittent TRENT Bell Furnaces are designed as a general purpose furnace used for heat treating large motors and transformers, annealing large glass masses and other heat treating applications in various industries.

Lifting Lug

Folded and Formed® Heating Elements

High Temperature Insulation

Bell furnaces use direct radiant heat and are engineered to deliver a uniform blanket of heat to the work load over which it is placed. Built with heavy gauge carbon steel outer casings, the furnaces are insulated with high grade brick as the chamber liner, backed by courses of medium temperature insulating slabs for minimum heat loss and low outer casing temperature. The heating elements are TRENT Folded and Formed® alloy ribbon type located on side walls only and mounted to ceramic element retainers that are keyed to the brick chamber liner and are protected by high temperature alloy metallic guards from damage when the furnace is raised and lowered. TRENT offers an optional insulated base designed to the customers requirements. Handling equipment is generally provided by the customer since the methods of raising and lowering the Bell furnace will vary from application to application. Control is obtained through the use of pyrometer or potentiometer supplied by a reputable manufacturer. Straight off/on control is usually satisfactory, but more sophisticated systems may be dictated by the process.

STANDARD FEATURES:

OPTIONS:

§ §

§ § § §

§

§ § §

Standard parts with little or no maintenance required. Laminated fire brick chamber liner and throat backed by slab type secondary insulation. TRENT Folded and Formed® heating elements supported by ceramic retainers that are keyed into the brick-lined furnace chamber sidewalls. No heating elements are located on the top of the chamber Lifting Lugs as required. One sheathless type thermocouple for heat chamber control. One gold fuse which melts at 1940°F(1060°C) for furnace over temperature protection.

§ §

Alloy Heating Element Guards

Optional Insulated Base to Mount Furnace

Schematic View --- Cutaway Section BA Furnace Series

Insulated furnace base. Furnace lifting mechanism. Fused safety disconnect switch. Standard NEMA and UL listed switchgear and control panel. Electronic control instrument and product over temperature protection as required. Special purpose accessories.

BA Series --- Standard Sizes --- 1850°F (1010°C) Continuous Rating or 2100° (1149°C) Intermittent Rating on Request Type

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Kw

Volts*

PH.

BA-50 1.9 120 BA-100 6.5 120 BA-200 7.3 120 BA-500 13 120/240 BA-1000 17 120/240 BA-1600 24 240/480 BA-1900 27 240/480 BA-2500 27 240/480 BA-3500 36 240/480 BA-5000 42 240/480 * Voltages listed are not dual voltages.

1 1 1 3/1 † 3/1 † 3 3 3 3 3

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Chamber Size Diameter Height

Outside Diameter Height

6" 8-1/2" 27-1/2" 18" 7" 16" 28-1/2" 26" 12" 16" 34" 26" 12" 22" 34" 32" 14" 24" 36" 33" 21" 25" 42" 38" 18" 29" 40" 47" 23" 25" 44" 45" 27" 25" 49-1/2" 45" 27" 32" 49-1/2" 52" † 12O Volt, 3-Phase or 240 Volt, Single-Phase.

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BOX FURNACES

201 Leverington Avenue Philadelphia, PA 19127 Phone: 215.482.5000 Fax: 215.482.9389 Website: www.trentheat.com E-mail: [email protected]

H Series --- 1850°F (1010°C) Max. TRENT H Series Box Furnaces are used for heat treating ferrous and non-ferrous metals, firing of ceramics, annealing of glassware, processing of chemicals and for general research purposes requiring accurate, uniform heating. Construction: The furnaces are built with heavy gauge steel outer casings reinforced for rigidity and rugged service. The basic furnace is designed for use with an oxidizing atmosphere. Optional controlled atmosphere construction is available with gas-tight welding, atmosphere inlet and outlet and other features. They are insulated with high grade brick as the chamber liner backed by courses of medium temperature insulating slabs for minimum heat loss and low outer casing temperature. The heating elements are TRENT Folded and Formed® alloy ribbon type located on the sidewalls, top and bottom of the chamber and mounted to ceramic element retainers that are keyed to the brick chamber wall. The heating element spacing assures a uniform temperature throughout the work chamber area. A silicon carbide hearth plate protects the heating elements on the floor and also supports the work load. The counter-weighted vertical-lift door is standard for manual operation. All furH Series Furnace naces are leg mounted to bring hearth 36” above floor level. Standard H Type Furnace carries a maximum chamber continuous operating temperature of 1850°F (1010°C). All furnaces are delivered with with air operated vertical-lift door chamber control thermocouple installed. Control packages are optional as required by the customer.

STANDARD FEATURES: § § § § § §

Standard parts with little or no maintenance required. Laminated fire brick chamber liner and throat backed by slab type secondary insulation. Rugged steel construction for most industrial uses. Silicon carbide type hearth plate. Vertical lift, counter-weighted door for quick access to work chamber; door gasket and toggle claps for tight seal. TRENT Folded and Formed® heating elements supported by ceramic retainers that are keyed into the brick lined furnace chamber sidewalls, top and bottom.

H Series ---

Type

Legs to bring the hearth 36” above floor level Chamber thermocouple and either a gold fuse (1940°F melting point), or a second thermocouple for furnace over-temperature protection.

OPTIONS: §

Fused safety disconnect switch, standard NEMA and UL listed switchgear and control panel for remote mounting. § Control instrument as required. § High temperature operation for intermittent use to 2150°F max. § Fabricated 330 stainStandard Sizes --- 1850°F (1010°C) Continuous Rating or less steel hearth 2150° (1177°C) Intermittent Rating on Request (1850°F max. only) § Air Cylinder door liftInside Outside ing mechanism. kW Volts* PH. W H D W H D § Non-explosive type 8 240 1 12" 9" 18" 44" 68" 48" atmosphere opera14 240 1 12" 9" 24" 44" 68" 54" 18 240 1 12" 9" 36" 44" 68" 66" tion capabilities with 18 120/240 3/1 † 15" 12" 24" 47" 78" 54" fully welded gas-tight 18 120/240 3/1 † 15" 12" 30" 47" 78" 60" construction, atmos24 240 3 15" 12" 36" 47" 78" 66" phere inlet and out30 240 3 18" 15" 36" 50" 74" 6" let and other features 36 240 3 18" 15" 48" 50" 74" 78" § Special purpose 16.5 240 1 18" 18" 18" 50" 77" 48" accessories.

H-12918 H-12921 H-12936 H-151224 H-151230 H-151236 H-181536 H-181548 H-181818 H-181836 33 240/480 ¤ 3 H-241836 38 240/480 ¤ 3 H-241848 50 240/480 3 H-241860 60 240/480 3 H-242460 70 240/480 3 H-242424 30 240 3 H-242448 45 240/480 3 H-303054 85 240/480 3 H-362448 70 240/480 3 * Voltages listed are not dual voltages. † 12O Volt, 3-Phase or 240 Volt, Single-Phase

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§ §

18" 24" 24" 24" 24" 24" 24" 30" 36"

18" 36" 57" 77" 66" 18" 36" 56" 77" 66" 18" 48" 56" 77" 78" 18" 60" 56" 77" 90" 24" 60" 56" 83" 90" 24" 24" 56" 83" 54" 24" 48" 56" 83" 78" 30" 54" 62" 89" 84" 24" 48" 68" 83" 78" ¤ 480 Volt, 3-Phase available only for 1850°F Larger Custom Sizes are available.

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201 Leverington Avenue Philadelphia, PA 19127 Phone: 215.482.5000 Fax: 215.482.9389 Website: www.trentheat.com E-mail: [email protected]

MUFFLE DESIGN BOX FURNACES HM Series Muffle Design --- 1900°F (1083°C) Max. The demand for small atmosphere furnaces, where atmosphere control must be positive yet can effectively operate without atmosphere generating equipment has been met by TRENT through the HM Muffle design box furnace. This furnace can be used for tool hardening, low temperature brazing, bright annealing, general metal heat treating and other processes requiring a controlled atmosphere up to 1900”F (1083°C). Like the H Series Box Furnaces the HM muffle Design Series furnaces utilize TRENT Folded and Formed® alloy ribbon type heating elements which are located on both side walls, top and bottom of the chamber and mounted to ceramic element retainers keyed to the brick chamber wall. These elements are replaced by simply sliding them in and out of the ceramic retainers. Heating elements are spaced to assure a uniform temperature throughout The furnace is equipped with a gas tight muffle made of high alloy metal complete with atmosphere inlet, outlet and thermowell. The muffle feature permits the use of bottled gases. For purposes of quick cooling, a pressure blower system may be added to this furnace at slight additional cost. If desired, the muffle may be mounted to an optional wheeled dolly to permit quick and easy removal of muffle for cooling purposes.

HM Series Muffle Design Box Furnace with dolly and remote control panel

Furnace has operating temperature limitation of 1900’F (1083°C).

RETORT OPERATION CONTROL:

A controlling pyrometer thermocouple is placed in the furnace heating chamber. Another thermocouple is placed in the retort thermowell. Each thermocouple is wired to a separate control instrument. Both controller contacts are wired in series so that if the heat chamber temperature approaches set temperature before material in retort comes to temperature, the heat chamber temperature is controlled. Then as material in the retort comes to temperature the retort control takes over. This system prevents damage to heating elements through over-temperature in the heating chamber and insures a maximum safe heating rate.

STANDARD FEATURES:

OPTIONS:

§ §

§ §

§ §

§

§ §

Standard parts with little or no maintenance required. 4-½" of LW-23 brick backed by 4-½” of slab type secondary insulation. Rugged steel construction for most industrial uses. Fully welded gas-tight 330 stainless steel muffle complete with mounting flange, insulated cover with atmosphere inlet, outlet and gas-tight thermowell. TRENT Folded and Formed® heating elements supported by ceramic retainers that are keyed into the brick lined furnace chamber sidewalls, top and bottom. Legs to bring the hearth 36” above floor level Chamber and retort thermocouples.

§ § § §

Fused safety disconnect switch. Standard NEMA and UL listed switchgear and control panel for remote mounting. Control instrument as required. Forced cooling pressure blower mounted and rated 874 CFM at ½” static pressure. Dolly mounted muffle for easy removal of muffle from the furnace chamber for cooling purposes. Special purpose accessories.

HM Series --- Standard Sizes --- 1900°F (1038°C) Maximum Type

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kW

Volts*

PH.

W

HM-12918 8 240 1 HM-12924 14 240 1 HM-12936 18 240 1 HM-151224 18 120/240 3/1 † HM-151230 18 120/240 3/1 † HM-151236 24 120/240 3 * Voltages listed are not dual voltages. † 12O Volt, 3-Phase or 240 Volt, Single-Phase

12" 12" 12" 15" 15" 15"

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Inside H

D

W

Outside H

9" 18" 44" 9" 24" 44" 9" 36" 44" 12" 24" 47" 12" 30" 47" 12" 36" 47" Larger Custom Sizes are available.

68" 68" 68" 78" 78" 78"

D 48" 54" 66" 54" 60" 66"

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201 Leverington Avenue Philadelphia, PA 19127 Phone: 215.482.5000 Fax: 215.482.9389 Website: www.trentheat.com E-mail: [email protected]

HORIZONTAL RECIRCULATING FURNACES GF Series --- 1400°F (790°C) Max.

Vertical Lift Door

TRENT GF Series Horizontal Air Recirculating Furnace is used in the metal working and glass industry for annealing glassware, annealing and cleaning of distillation columns and drying. The metal trades use this furnace extensively for tempering, aging, drawing and other heating operations. Mounted in the furnace chamber is a 310 type stainless steel four-sided muffle of heavy gauge stock. The rear wall of the muffle has a guarded opening behind which is an alloy steel centrifugal flow type fan. The fan draws air across and around the work load in the muffle, with air passing horizontally from front to back, then returns air to the front of the furnace through the annular space between the muffle outer wall and the furnace inner liner, where the heating elements are located. The air passes through this space on all four sides of the muffle for continuous and even reheating.

High Temperature Insulation

Alloy Muffle

Recirculating Fan Drive Motor

Folded and Formed® Heating Element on sides, top and bottom

Schematic View --- Cutaway Section GF Series Furnace

STANDARD FEATURES: § § § § §

§

§

§

Standard parts with little or no maintenance required. Laminated fire brick chamber liner and throat backed by slab type secondary insulation. Rugged steel construction for most industrial uses. Horizontal air circulation, front to back. Stainless steel reinforced muffle which acts as an air recirculation channel and hearth with two (2) removable shelves TRENT Folded and Formed® heating elements supported by ceramic retainers that are keyed into the brick-lined furnace chamber sidewalls, top and bottom. One-piece insulated side-hinged plug type door.

§

One control thermocouple for heat chamber control installed. Legs to bring the hearth to a workable height.

OPTIONS: § § § § §

Fused safety disconnect switch. Standard NEMA and UL listed switchgear & control panel. Electronic Control instruments as required. Swing-hinged, manually operated vertical-lift or air-operated vertical lift door Special purpose accessories.

GF Series --- Standard Sizes --- 1400°F (760°C) Maximum Type

kW Glass Metal

Volts*

W

Inside H

D

W

Outside H

D

Fan Motor

Motor Drive

GF-1318 11 24 240 13" 18" 24" 40" 71" 65" 1 HP Direct GF-1824 12 24 240 18" 18" 24" 45" 71" 65" 1 HP Direct GF-2678 12 24 240 18" 18" 36" 45" 71" 78" 1 HP Direct GF-3454 15 30 240 18" 18" 48" 45" 71" 90" 1 HP Direct GF-2424 18 30 240 24" 24" 24" 51" 73" 66" 1 HP Direct GF-2436 21 30 240/480 24" 24" 36" 51" 73" 78" 1 HP Direct GF-2448 23 35 240/480 24" 24" 48" 51" 73" 90" 1 HP Direct GF-2460 30 45 † 240/480 24" 24" 60" 51" 73" 102" 1 HP † Direct † GF-2472 36 40 † 240/480 24" 24" 72" 51" 73" 114" 1 HP † Direct † GF-3036 24 30 240/480 30" 30" 36" 57" 73" 78" 1 HP Direct GF-3048 30 40 † 240/480 30" 30" 48" 57" 73" 90" 1 HP † Direct † GF-3060 36 40 240/480 30" 30" 60" 57" 73" 102" 2 HP Indirect GF-3072 36 40 240/480 30" 30" 72" 57" 73" 114" 2 HP Indirect GF-3636 240/480 36" 36" 36" 64" 75" 78" 2 HP Indirect 39 GF-3648 50 240/480 36" 36" 48" 64" 75" 90" 2 HP Indirect GF-3660 60 240/480 36" 36" 60" 64" 75" 102" 2 HP Indirect GF-3672 75 240/480 36" 36" 72" 64" 75" 114" 2 HP Indirect * All Voltages are 3-Phase. Voltages listed are not dual voltages --- please specify w hen ordering. Larger Custom Sizes are available. † These furnaces have 2 HP Indirect Drive Motors.

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Hearth Height 39½" 39½" 39½" 39½" 36" 36" 36" 36" 36" 30" 30" 30" 30" 30" 24" 24" 24"

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201 Leverington Avenue Philadelphia, PA 19127 Phone: 215.482.5000 Fax: 215.482.9389 Website: www.trentheat.com E-mail: [email protected]

HORIZONTAL RECIRCULATING FURNACES GFH Series --- 1750°F (954°C) Max. TRENT GFH Series Horizontal Air Recirculating Furnace is used in the metal working and glass industry for annealing, heat treating,etc at temperatures greater than 1400°F. Similar in design to the GF Series Furnaces, the furnace chamber is a high alloy four-sided muffle. The rear wall of the muffle has a guarded opening behind which is a high alloy steel centrifugal flow type fan. The fan draws air across and around the work load in the muffle, with air passing horizontally from front to back, then returns air to the front of the furnace through the annular space between the muffle outer wall and the furnace inner liner, where the heating elements are located. The air passes through this space on all four sides of the muffle for continuous and even reheating.

GFH Series Air Recirculating Furnace

STANDARD FEATURES: § § § § §

§

§ § §

Standard parts with little or no maintenance required. Laminated fire brick chamber liner and throat backed by slab type secondary insulation. Rugged steel construction for most industrial uses. Horizontal air circulation, front to back. High alloy muffle to withstand elevated temperatures and acts as an air recirculation channel and hearth with two (2) removable shelves TRENT Folded and Formed® heating elements supported by ceramic retainers that are keyed into the brick-lined furnace chamber sidewalls, top and bottom. Vertical lift, counter-weighted door for quick access to work chamber; door gasket and toggle clamps for tight seal. One control thermocouple for heat chamber control installed. Legs to bring the hearth to a workable height.

OPTIONS: § § § § §

Fused safety disconnect switch. Standard NEMA and UL listed switchgear and control panel. Electronic Control instrument and product over temperature protection as required. Air cylinder door lifting mechanism Special purpose accessories.

GFH Series --- Standard Sizes --- 1750°F (954°C) Maximum Type

kW

Volts*

W

Inside H

D

W

Outside H

D

Fan † Motor

GFH-1318 17 240 13" 18" 24" 49" 77" 72" 1 HP GFH-1824 20 240 18" 18" 24" 54" 77" 72" 1 HP GFH-2678 30 240 18" 18" 36" 54" 77" 84" 1 HP GFH-3454 40 240/480 18" 18" 48" 54" 77" 96" 2 HP GFH-2424 30 240 24" 24" 24" 60" 85" 72" 1 HP GFH-2436 45 240/480 24" 24" 36" 60" 85" 84" 2 HP GFH-2448 60 240/480 24" 24" 48" 60" 85" 96" 2 HP GFH-2460 75 240/480 24" 24" 60" 60" 85" 108" 2 HP GFH-2472 90 240/480 24" 24" 72" 60" 85" 120" 2 HP GFH-3036 52 240/480 30" 30" 36" 66" 86" 84" 2 HP GFH-3048 70 240/480 30" 30" 48" 66" 86" 96" 2 HP GFH-3060 85 240/480 30" 30" 60" 6" 86" 108" 2 HP GFH-3072 120 240/480 30" 30" 72" 66" 86" 120" 2 HP GFH-3636 63 240/480 36" 36" 36" 72" 88" 84" 2 HP GFH-3648 84 240/480 36" 36" 48" 72" 88" 96" 2 HP GFH-3660 105 240/480 36" 36" 60" 72" 88" 108" 2 HP GFH-3672 125 240/480 36" 36" 72" 72" 88" 120" 2 HP * All Voltages are 3-Phase. Voltages listed are not dual voltages --- please specify w hen ordering. † All furnaces have Indirect Drive Motors. Larger Custom Sizes are available.

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Hearth Height 36" 36" 36" 36" 36" 36" 36" 36" 36" 30" 30" 30" 30" 30" 24" 24" 24"

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201 Leverington Avenue Philadelphia, PA 19127 Phone: 215.482.5000 Fax: 215.482.9389 Website: www.trentheat.com E-mail: [email protected]

HIGH TEMPERATURE BOX FURNACES

SCR Series --- 2500°F (1371°C) to 2750°F (1510°C) Max. The TRENT SCR Series High Temperature Box Furnaces is designed to operate at temperatures up to 2500°F (1371°C) in a reducing atmosphere and 2750°F (1510°C) in an air atmosphere. The outer casing is reinforced welded carbon steel, lined with two grades of laminated, high temperature insulation. The heating elements are silicon carbide type resistors located on the ceiling and beneath a silicon carbide hearth plate. These elements are connected in series for 240 or 480 volt operation. The brick-lined furnace chamber reflects heat, radiating it into the charge. This also aids in maintaining fine temperature distribution throughout the furnace. With the heating elements located beneath the hearth are protected against scale and accidental breakage.

High Temperature Brick and Laminated Insulation

Atmosphere Inlet Counterweighted Door

Silicon Carbide Rod Type Heating Elements

Flame Curtain Burner

Gas Tight Terminal Box

Silicon Carbide Hearth Plate

The standard door is a manually operated, counterweighted, vertical lift type to SCR Type Furnace provide a tight seal with the brick lined furnace front. An air cylinder or electric for reducing atmosphere motor door operation is optional. The standard furnace is built for operation with an air atmosphere. The furnace can be delivered with a gas tight outer casing, gas tight terminal boxes, atmosphere inlet, flame burner curtain and slant mounted counterweighted manually operated door for use in a reducing atmosphere. An automatic, indicating, controlling type temperature instrument can be supplied with a magnetic contactor, and platinum rhodium type thermocouple. The temperature control instrument is usually for remote mounting by the user.

STANDARD FEATURES:

OPTIONS:

§ § §

§ §

§ § § § §

Standard parts with little or no maintenance required. 4-½" of brick backed by 2” of slab type secondary insulation. Heavy duty welded steel construction for most industrial uses. High grade silicon carbide type hearth plate. Vertical lift, counter-weighted door for quick access to work chamber. Heating elements are silicon carbide type resistors located beneath the hearth plate for long life. Mounted on legs to bring the hearth 36” above floor level. Platinum rhodium type thermocouple is standard.

§ § §

Fused safety disconnect switch. Standard NEMA and UL listed switchgear and control panel. Control instruments as required. Gas tight construction for reducing atmosphere requirements. Special purpose accessories.

SCR Series --- Standard Sizes --- 2500-2750°F (1371-1510°C) Maximum Type

kW

Volts*

PH.

W

SCR-10818 15 240/480 3 10" SCR-121024 36 240/480 3 12" SCR-151230 48 240/480 3 15" SCR-181836 68 240/480 3 18" SCR-241836 72 240/480 3 24" * Transformer required for operation on either of listed voltages.

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Inside H 8" 10" 12" 18" 18"

D

W

Outside H

18" 40" 66" 24" 42" 73" 30" 44" 80" 36" 48" 80" 36" 54" 85" Larger Custom Sizes are available.

D 45" 57" 61" 67" 67"

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201 Leverington Avenue Philadelphia, PA 19127 Phone: 215.482.5000 Fax: 215.482.9389 Website: www.trentheat.com E-mail: [email protected]

SINCE 1927 SOLVE YOUR HEATING PROBLEMS WITH

TRENT Electrically Heated Industrial Equipment & Folded and Formed® HEATING UNITS TRENT exposed ribbon type heating elements have proven their advantages wherever high-temperature, controlled, radiant heat is essential for efficient, low-cost processes. The TRENT Folded and Formed® heating element is the heart of the CUSTOM-BUILT EQUIPMENT AND HEATING UNITS......to assure a greater radiating surface per square inch of cross-section than any other type of electrical heating element!

DETAILS OF TRENT’S COMPLETE LINE OF ELECTRICALLY HEATED PROCESS EQUIPMENT AND HEATING ELEMENTS CAN BE FOUND ON OUR WEBSITE www.trentheat.com AND IN THE FOLLOWING LITERATURE:

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Capabilities Brochure Product Bulletin Folded and Formed® Heating Elements Pamphlet Folded and Formed® Heating Units Folded and Formed® Heating Elements Folded and Formed® Heater Racks Plug Heaters Electric Furnaces Electric Ovens Electric Jackets Electric Kettles and Melters Conveyor Ovens and Furnaces Immersion and Fintube Heaters Water Immersion Heaters Oil Immersion and Fintube Heaters Other Heating Elements Strip Heaters Cartridge Heaters Tubular Heaters Hot Plates Ceramic Ring Heaters

FOR MORE INFORMATION about our products, to request literature, or a quote use one of the following methods: CALL E-MAIL us at VISIT our WEBSITE at

1.800.544.TRENT [email protected], or www.trentheat.com

Bulletin Bulletin Bulletin Bulletin

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CB PB FF 10

Bulletin Bulletin Bulletin Bulletin Bulletin Bulletin

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20 30 40 50 60 70

Bulletin - 90

WARRANTY: Most of our products carry a one-year warranty on material and workmanship. Exceptions are products used in extreme heat applications or products determined to be damaged through improper use or mishandling.

7-2005

FURNACE QUESTIONNAIRE

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Thank you for your interest in TRENT Products. To assist us in designing and recommending a furnace system for you, please complete and return the following questionnaire to us: CONTACT NAME

TITLE

COMPANY

PHONE

ADDRESS

FAX

EMAIL CITY

STATE

COUNTRY

ZIPCODE

WEBSITE

YOUR PRODUCT:

What TYPE OF MATERIAL will you be processing in this Furnace? (Steel, Brass, Glass, Chemicals, Liquid, or Solid, etc.) What are the unit QUANTITY. SIZE and WEIGHT, individually and in the aggregate, of the load to be processed, including fixtures, clamps, jigs, etc.?

What is the Specific Heat of the material, if known? YOUR PROCESS:

What type of operation will you be performing in this furnace? (ex. Annealing, Drying, heat treating, etc.) In order for us to understand the temperature requirements of your process, please provide the following: (If not applicable, please indicate N/A) °F

Normal Operating Temperature Temperature Uniformity

±°F

In What Size Cube? YES

Will the batch be at room temperature when loaded? Will the batch be placed in a cold furnace?

°F

Maximum Temperature

YES

NO

NO

If NO, what temp.?

°F

If NO, what oven temp.?

°F

What is your desired production rate? (Units / Hour or Shift , Lbs. / Hour, etc.) What is your desired HEAT-UP TIME to control point? (Minutes, Hours)) Process Duration

°F

Desired Product End Temp.

Does this process require a blower for purging, forced air exhaust or rapid cool-down? Are flammable, explosive, toxic or noxious vapors or fumes produced from your process?

YES YES

NO NO

If YES, in what concentration? Is your product or process corrosive to metals? Does this process require a controlled atmosphere?

YES

NO YES

NO

What type?

How will the material be LOADED or STACKED? (ex. baskets, trays, etc.)

TRENT, Inc., 201 Leverington Avenue, Philadelphia, PA 19127 Phone: 800-544-TRENT FAX: 215-482-9389 Website: www.trentheat.com Email: [email protected]

FURNACE QUESTIONNAIRE

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THE FURNACE: What ELECTRICAL SERVICE is available?

Voltage

Phase

Amps

Hz

How much FLOOR SPACE is available?

Width

Height

Depth

What interior CHAMBER SIZE do you require?

Width

Height

Depth

TRENT furnaces are standard for bench or floor mounting with or without legs. Do you require a muffle?

YES

NO

What is the Maximum Load Weight?

Most TRENT furnaces are without forced air recirculation, however certain models are available with this feature. Do you require recirculated airflow? YES NO Do you want the furnace controls mounted on the left side or right side when facing the furnace, or remotely mounted apart from the furnace? Left Side Right Side Remote Mounting When do you require DELIVERY of this Furnace? What type of CONTROL INSTRUMENTATION is desired?:

BRAND PREFERENCE

ON/OFF PID Control Proportional PID Control with SCR Power Controller Programmable Controller for Ramp and Soak Chart Recorder Overtemperature Protection Indicating Lights, Alarm Bells, etc. Other (Indicate in space provided)

ADDITIONAL COMMENTS:

USE THIS AREA TO SKETCH ANY PERTINENT DIMENSIONS:

TRENT, Inc., 201 Leverington Avenue, Philadelphia, PA 19127 Phone: 800-544-TRENT FAX: 215-482-9389 Website: www.trentheat.com Email: [email protected]