Innovative Automatic Control Valves Hydraulic Control Valves for Water Works & Irrigation

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Ooval valves are self-acting, pilot operated diaphragm control valves that provide remarkable benefits and unparalleled value in both basic on/off operations and sophisticated functions - controlling pressures, levels and flows.

The valves are hydraulically operated automatic valves that combine the simplicity and reliability of a diaphragm valve with the control capabilities of a pilot operated, self-acting regulator. The unique design of the valve optimizes both flow capacity and control. The revolutionary body design provides a streamlined flow path and incorporates the multi-functional oval diaphragm in an efficient hydrodynamic design. This design provides superior resistance to cavitation and erosion and insures smooth flow without turbulence or noise.

One basic valve… At the heart of the valve lies the unique oval diaphragm, which is capable of opening and closing at 0.4 bar, as well as normal operation up to 16 bar. The valve’s incomparable versatility offers pressure reduction over a wide range of flows. Other valves have limitations and require special accessories or different diaphragms to achieve optimum results. Ooval valve’s greater range of flows overcome these restrictions, providing immediate solutions for general water supply and irrigation. Ooval valves are used in water works, agricultural, landscape, industrial, mining and wastewater applications. 2

Consistent Performance • Reliable trouble free valve operation; controlled, smooth and accurate closing and opening at low flows with drip-tight sealing. • Extremely stable and accurate control during shut-off and regulation; provides versatile rangeability and low flow control. • High flow capacity and very low head loss resulting from the innovatively designed body and flow path. • Positive drip-tight sealing is guaranteed by the oval diaphragm’s design and its resilient sealing surface. • Easy inline maintenance is provided by top entry design. • Rugged, high quality construction meets applicable engineering standards. • Proven pressure, flow and level regulation pilots, electric solenoids and control accessories.

one valve spring… one diaphragm…for all applications. Provides operational flexibility; no need for different diaphragms and springs to meet varying pressures or flow conditions.

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Dependable Control

Design based on simplicity. Engineered to perform under the most demanding conditions. Each valve assures a closing close, which minimizes water hammer and absorbs the pressure shock caused by system shut-off. Open Mode

High Efficiency – Low Head Loss

The flow path is wide and clear of obstructions for superior hydraulic performance and lower pressure loss.

Pressure Reduction Over A Wide Flow Range

Ooval valves are capable of reducing pressures at extremely low flow rates, as well as high flow rates, due to the multi-functional oval diaphragm. The same diaphragm can open, close, and reduce pressures down to 0.4 bar. Closed Mode

Protective Coating

The interior and exterior of the valve are treated with a pliable electrostatic spray polyester coating that will not chip, is rust resistant, and stands up to sun, salt and other corrosive elements. The coating process includes pre-treatment blasting, electrostatic spraying of polyester, and oven-heated curing to bond the paint.

Easy Maintenance

Ooval valves require minimal maintenance. The valve never needs to be removed from the line. The bonnet is easily removed revealing the diaphragm and spring that may require upkeep. Diaphragm

Hydraulic Accessories

Ooval offers a complete line of multi-purpose pilots and accessories. By combining Ooval valves with precise hydraulic accessories, solutions to both common and more complex valve requirements are readily attained. The plastic pilot in particular, has new innovative features not available in similar type products; such as larger passages for quick reaction time and non-breakable directional assembly.

All Ooval valves can be controlled by 3-way pilots or 2-way control loops. Standard valves can be controlled manually or by Electric, Pressure Reducing, Pressure Sustaining/Relief, Hydraulic Relay, and Quick Reacting Pressure Relief. Additional valve control features include Surge Anticipating-Quick Relief, Pump Control, Flow Rate Control, Two Stage Opening, Float Control, and Check Valve options.

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Technical Specifications Flow Chart

1”+1½”

1½S”

Valve Specifications Body

3R”+2”

2A”

4A”

6” 8” 10”

Bonnet Diaphragm Spring Seat Bolts

Estimated

12”

Cast Iron/ASTM A 45 CI S25 A Cast Bronze/BS 1400 LG Ductile Iron/ASTM A-536 Same as above Natural Rubber Stainless Steel Acetal Steel Cobalt Coated

3N” 3S”

2000 4500

8800

Valve Dimensions Straight

Angle

Inch 1" 1.5"N 1.5"S 2" 2" 323" 3" 3" 3" 3"S 3"S 4" 4" 6" 6" 8" 10" 12" 2" 323" 3" 3" 3" 3S" 3S" 4" 4"

Size mm 25 40 40 50 50 80-50-80 80 80 80 80 80 100 100 150 150 200 250 300 50 80-50-80 80 80 80 80 80 100 100

Material cast iron cast iron cast iron Bronze cast iron cast iron cast iron cast iron cast iron cast iron cast iron cast iron cast iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron cast iron Cast iron cast iron cast iron cast iron cast iron cast iron cast iron cast iron

Connections threaded threaded threaded threaded threaded threaded threaded Flanged Grooved threaded Flanged Grooved flanged Grooved Flanged Flanged Flanged Flanged threaded threaded threaded Flanged Grooved threaded Flanged Grooved Flanged

Length (L) Inch mm 5 127 5.51 140 6.9 176 7.32 186 7.32 186 9.88 251 10 254 10 254 10 254 12.48 317 10 254 12.01 305 12.01 305 17.17 436 15.98 406 20.5 521 24.92 633 29.9 753 6.34 161 8.11 206 9.64 245 10.39 264 8.61 218.7 9.64 245 10.39 264 9.37 238 11.73 298

Height (H) Inch mm 2.16 55 2.76 70 3.11 79 3.35 85 3.29 84 4.37 111 5 127 7.87 200 4.52 115 5.73 146 7.89 201 5.64 143 8.7 221 8.36 212.31 11.38 289 13.5 343 15.98 406 18.9 480 6.34 161 8.11 206 9.64 245 10.39 264 8.61 218.7 9.64 245 10.39 264 9.37 238 11.73 298

Width (W) Inch mm 3.07 78 3.07 78 4.96 126 4.96 126 4.96 126 4.96 126 6.4 162.4 7.87 200 6.4 162.4 8.35 212 8.35 212 8.34 212 8.7 211 11.81 300 11.8 300 13.5 343 20.7 527 20.7 527 4.96 126 4.96 126 8.31 211 8.31 211 6.34 161.2 8.31 211 8.31 211 8.31 211 8.31 211

Weight Lbs Kg 1.98 0.9 2.65 1.2 5.94 2.7 6.61 3 6.61 3 10.8 4.9 16.7 7.6 29.3 13.3 13 5.93 28.44 12.9 36.82 16.7 26.45 12 47.8 21.7 53.35 24.2 84.9 38.5 114.7 52 274 124.5 337 153.5 7.1 3.2 12.8 5.65 29.8 13.5 38.5 17.45 12.8 5.8 29.8 13.5 38.5 17.45 27.77 12.6 47.8 21.7

Recommended Working Conditions Nominal Diameter Inch 2” 323” 3” 3S” 4” 6” 8”

mm 50 80-50-80 80 80 100 150 200

Inlet Pressure, PSI & Bar Minimum Maximum Bar PSI Bar PSI 0.4 16 228 6 0.4 16 228 6 0.4 16 228 6 0.4 16 228 6 0.4 16 228 6 0.4 16 228 6 0.4 16 228 6

Flow Rate, GPM & (m3/h) Minimum Maximum GPM (m3/h) GPM (m3/h) 0.5 40 175 2.2 0.5 55 240 2.2 0.5 80 350 2.2 0.5 105 460 2.2 0.5 165 720 2.2 0.5 1630 370 2.2 0.5 1938 440 2.2

Fully Opened Valve *Cv Factor 109 109 195 307 312 862 885

*Kv Factor 95 95 160 260 270 740 760

Cv=Q/√ΔP Where Q=Flow Rate (GPM), ΔP=Head loss across the valve (PSI) Kv=Q/√ΔP Where Q=Flow Rate (M3/h), ΔP=Head loss across the valve (BARI)

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Pilot Specifications P-21 P-22 P-23 P-24 P-31 P-32 P-33 P-36

P-22 P-24

2-way Pressure Reducing metal pilot. 7-230 PSI (0.5-16 bar) 2-way Pressure Sustaining metal pilot. 7-230 PSI (0.5-16 bar) 2-way Quick Relief metal pilot. 7-230 PSI (0.5-16 bar) Altitude metal pilot. 7-230 PSI (0.5-16 bar) 3-way Pressure Reducing/Sustaining plastic pilot. 7-145 PSI (0.5-10 bar) 3-way differential pressure plastic pilot. 7-145 PSI (0.5-10 bar) 3-way Pressure Reducing/Sustaining Metal pilot. 7-230 PSI (0.5-16 bar) 3-way differential pressure metal pilot. 7-145 PSI (0.5-10 bar)

P-21 P-31

Principal Operation 3-way Pressure Reducing

Port 1 2 3 4

Pressure Reducing Sensing / Downstream Vent Control Chamber Pressure / Upstream

Pressure Sustaining Sensing / Upstream Pressure / Upstream Control Chamber Vent

Principal Operation 2-way Pressure Reducing

Port 1 or 2 3 4

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Pressure Reducing Sensing / Downstream Pressure / Upstream Control Chamber

Pressure Reducing Valve Applications Ooval reducing configurations for general water supply systems with medium pressure rating. The plastic pilot model is best for irrigation and low-pressure applications. The plastic materials and straightforward design provide high corrosion resistance and cost-effective prices. The 2-way pilot configuration, together with the unique diaphragm, enables smooth and precise pressure control. Use Ooval valve for domestic, water works, and filtration networks. Description Ooval valves are piloted hydraulic valves activated by line pressure. The pilot valve has a spring-loaded diaphragm that is sensitive to downstream pressure. The pilot’s spring is preset to the desired reduced pressure. The pilot valve maintains a constant downstream pressure by gradually opening and closing the Ooval valves at any flow rate. Available Models • 3-way Pressure Reducing Valve for sizes 2”-8” with pressure ratings up to 145 PSI (10 bar). • 2 and 3-way Pressure Reducing Valve with pressure rating up to 232 PSI (16 bar). Adjustment • Adjust the reduced pressure set point with the adjusting screw on the pilot. Function The Ooval Pressure Reducing Valve is activated by line pressure and controlled by the pilot valve. The pilot includes a spring-loaded diaphragm that is exposed to the downstream pressure. The displacement of the membrane due to downstream fluctuation defines the flow direction inside the pilot. When the downstream pressure is lower than desired, the valve is automatically directed to open. In the reverse case, it is automatically directed to close. When line pressure is inserted into the control chamber of the valve (above its diaphragm) the valve closes. When the control chamber drains, the valve opens as a result of the line pressure from below its diaphragm. In two-way configurations, the control chamber drains downstream, enabling faster reaction time and gradual opening without water discharge.

Control Mode – 3-way Plastic/Metal Pilot

Control Mode – 2-way Pilot

Manual: Use the three-way selector to close or open the valve by turning the handle to C (closed) or O (open) positions. Automatic: Position the three-way selector handle to A (automatic). When the downstream pressure is lower than that of the pilot spring, the valve’s control chamber drains via ports 3 and 2 of the pilot to open the valve. When the downstream pressure is too high, the pilot diaphragm moves upward allowing ports 3 and 4 to connect, thus permitting line pressure to close the valve.

Manual: To open the Ooval valve, open isolation valves 1 and 2. To close the Ooval valve, close the downstream isolation valve. Automatic: When the downstream pressure is lower than that of the pilot spring, the control chamber drains downstream and the valve opens. In this case, there is a connection between port 3 (inlet upstream), port 1 or 2 (outlet downstream) and the control chamber. When the downstream pressure rises above the preset spring load, the pilot’s diaphragm is forced upward, closing port 1 or 2. The valve then begins closing and downstream pressure decreases.

In three-way configurations, the control chamber drains out to atmosphere, permitting the valve to open entirely.

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Pressure Sustaining / Relief Valve Applications Use the pressure sustaining/relief valve to maintain constant upstream pressure and to avoid undesirable high-pressure situations. This protection is required for most irrigation systems, domestic and industrial utilities, and for general water supply systems. The 3-way plastic pilot model provides high resistance to corrosion at a cost effective price. It is best for irrigation, filtration manifolds, water treatment circulation and low-pressure domestic applications. The 2-way pilot command provides smooth and precise pressure control. Description The pilot valve has a spring-loaded diaphragm that is exposed to upstream pressure. The valve is normally closed. With Pressure Relief Valves, only when the line pressure rises above a preset point does the valve open to reduce the excessive upstream pressure. The excess pressure is released off-line. Pressure Sustaining Valves reduce the excessive downstream pressure without causing surge hazards. When the line pressure drops beneath the desired point, the valve closes. Available Models • 3-way plastic piloted pressure sustaining/relief valve for sizes 2”-8” with pressure rating up to 145 PSI (10 bars). • 2 and 3-way Pressure Sustaining/Relief Valve with pressure rating up to 232 PSI (16 bars). Adjustment • Adjust the sustained pressure with the adjustment screw on the pilot. Function The Pressure Sustaining/ Relief Valve is activated by the line pressure and controlled by a pilot valve. A sustained pressure is preset by adjusting the pilot retaining spring. The pilot is connected to line pressure (upstream). The displacement of the pilot’s spring-loaded diaphragm due to upstream pressure defines the flow direction inside the pilot. When the upstream pressure is higher than the set point, the valve is piloted to open. Otherwise the valve remains closed, maintaining the upstream pressure. The excess line pressure is relieved downstream. In 3way pilot configurations, the valve control chamber drains out, enabling the valve to open fully. In 2-way pilot configurations, the control chamber drains downstream, enabling faster reaction time and gradual closure without water discharge.

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Control Mode – 3-way Plastic/Metal Pilot

Control Mode – 2-way Pilot

Manual: Use the three-way selector to close or open the valve by turning the handle to C (closed) or O (open) positions. Automatic: Position the three-way selector handle to A (automatic). When the upstream pressure is low, the pilot’s diaphragm is in its lowest position. The valve’s control chamber is exposed to line pressure through ports 2-3 of the pilot. The valve closes to sustain the upstream pressure. When the upstream pressure is higher than preset, the pressure overcomes the pilot’s spring and forces the pilot’s diaphragm to move upward. The connection between ports 3-4 opens and port 2 closes. The control chamber drains and the valve opens to relieve the excessive pressure downstream. In 3-way configurations, the control chamber drains out to atmosphere, permitting the valve to fully open.

Manual: To open the valve, open isolation valves 1 and 2. To close the valve, close the downstream isolation valve. The upstream isolation valve should remain open. Automatic: When the upstream pressure is lower than that of the sustained pressure set point, the valve’s control chamber is connected to the line. This connection occurs through ports 1 or 2 (inlet upstream) and port 3. The valve closes until the desired upstream pressure is achieved. When the upstream pressure rises above the set point, the pilot’s diaphragm is forced upward. Port 5 (outlet downstream) opens and the control chamber of the Ooval valve drains downstream, alleviating the excess pressure.

Pressure Reducing/Sustaining Valve Applications Use the pressure reducing/sustaining valve to define two pressure zones along a supply line. Typically, this occurs along a downhill flow. Description Pressure Reducing/Sustaining valves are piloted hydraulic valves activated by line pressure and controlled by pilots. Both pilots have spring-loaded diaphragms. One pilot is responsive to upstream pressure and the other to downstream pressure. The combined operation of the two pilot valves sustains the preset minimum upstream pressure of the valve, and at the same time, reduces the downstream pressure to a preset maximum pressure. The valve opens or closes gradually to maintain both required pressures simultaneously. Available Models • 3-way plastic piloted Pressure Reducing/ Sustaining valve. Plastic pilot is used for 2”-8” sizes with pressure rating up to 145 PSI (10 bar). • 2 and 3-way pressure Reducing/Sustaining valve with pressure rating up to 232 PSI (16 bars). Adjustment • Adjust the pressure set points with the adjusting screws on the pilots. Function The Pressure Reducing/Sustaining valve is activated by the line pressure and controlled by two pilot valves. Both pilots include spring-loaded diaphragms. The sustaining pilot is preset to sustain the upstream pressure at a preset point. The reducing pilot reduces the downstream pressure and maintains it at a lower preset level. Under normal flow conditions, the valve is partly open to sustain the upstream pressure and reduce the downstream pressure. It partly closes when the downstream pressure rises above the lower set point or when the line pressure drops below the upper set point. It opens again when the upstream pressure rises. In 3-way pilot configurations, the control chamber of the valve drains out to atmosphere, enabling the valve to fully open. In 2-way pilot configurations the control chamber drains downstream, enabling faster reaction time and gradual opening without water discharge.

Control Mode – 3-way Plastic/Metal Pilot

Control Mode – 2-way Pilot

Manual: Use the three-way selector to close or open the valve by turning the handle to C (closed) or O (open) positions. Automatic: Position the three-way selector handle to A (automatic). When the upstream pressure is low, the line pressure flows through ports 2-3 of the sustaining pilot and flows into the valve’s control chamber. The valve closes to sustain upstream pressure. When the upstream pressure reaches the set point, the diaphragm of the reducing pilot moves upward and connects ports 2-3. The control chamber drains through the sustaining pilot and exits port 2 of the reducing pilot. The valve then opens to the preset downstream pressure. When the downstream pressure is greater then the desired level, the reducing pilot’s diaphragm moves up, allowing water to flow into the control chamber through ports 4-3 of the sustaining pilot.

Manual: To open the valve, open isolation valves 1 and 2. To close the valve close the downstream isolation valve. The upstream isolation valve should remain open. Automatic: When the upstream pressure is low, the control chamber is connected through the 2-way sustaining pilot to the line pressure and the valve closes. When the line pressure rises and overcomes the spring of the sustaining pilot, the pilot’s diaphragm moves upward to open port 5 (outlet downstream). The control chamber then drains downstream through the 2-way reducing pilot. The valve then opens and reduces the upstream pressure. As the line pressure is reduced, the sustaining pilot closes, as does the valve. If the downstream pressure is greater than the set point of the reducing pilot, the reducing pilot’s diaphragm moves upward and closes port 1 or 2 (outlet downstream). The control chamber is connected to the upstream pressure and the valve closes.

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Quick Pressure Relief Valve Applications A Quick Pressure Relief Valve (QPR) protects water systems from rapidly increasing excess pressure. It is recommended to install the Ooval QPR valve at the start of the system near the main supply line or booster pump. Description The Pressure Relief Valve is a piloted hydraulic valve activated by line pressure. The 2-way pilot has a spring-loaded diaphragm that is sensitive to upstream pressure. The valve is normally closed. As the line pressure rises above the preset level, the valve opens quickly to relieve the excess pressure. Available Models The valve is a general application 2-way piloted Pressure Relief Valve with a pressure rating up to 232 PSI (16 bar). Function The Pressure Relief Valve is activated by line pressure. The displacement of the diaphragm in the pilot is due to a rise in line pressure against the spring force. As the pressure increases above the set point, the water flow inside the pilot is directed so that the valve quickly opens.

Control Mode

Automatic: When the line pressure is low, the quick relief pilot and the valve are closed by line pressure. The valve remains closed until the line pressure is higher than the set point of the pilot. As pressure increases above the set point, the diaphragm moves upward under the line pressure and port 5 (outlet downstream) of the pilot opens, allowing the control chamber to drain through the vent. The Ooval valve opens in a few seconds relieving the excess pressure.

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Hydraulic/Electric Control Valve Applications On/Off electric valves are used for remote control of hydraulic valves. Normally open or normally closed configurations are available. Description The valve opens or closes by electric command through a selection of either 2-way or 3-way solenoid valves. The solenoid opens or closes the valve when energized by an electric signal. The electric signal originates with a controller, timer, sensor or remote control device. Available Models Three-way normally closed and 3-way normally open electric control valve. Two-way normally closed and 2-way normally open electric control valve. Function 2-way configuration: The valves control chamber drains downstream, enabling faster and gradual opening without water discharge. 3-way configuration: The valve control chamber drains to atmosphere, allowing the valve to open fully. Control Mode Normally Closed Mode: The line pressure is connected to the Ooval valve’s control chamber above its diaphragm via port P (pressure) and port C (common). The diaphragm is pressed downward against the valve seat closing the valve. As an electric signal energizes the normally open (NO) solenoid, its plunger changes position and the control chamber drains out through port V (vent). The diaphragm is forced upward by the line pressure and the valve fully opens. Normally Open Mode: The valve’s control chamber is connected to port C (common) of the solenoid. The valve’s diaphragm is pressed upward by line pressure keeping the valve in the open position. As the normally closed (NC) solenoid is energized by an electric signal, its plunger changes position and the vent closes. The control chamber of the valve becomes connected to the pressure source via port P (pressure) and port C and the valve closes.

N.O. Solenoid

C = Common P = Pressure V = Vent

N.C. Solenoid

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Hydraulic Remote Control Valve Applications Use this valve with a hydraulic remote control in those situations where the command pressure is lower or higher then the working pressure, or in situations where there are topographic differences between the command source and the line water pressure at the valve. The hydraulic remote control is also used where the use of wires is not feasible. Description On/Off hydraulic remote control valves are used for the remote control of hydraulic valves. In normally closed (NC) configurations, the valve remains closed until the hydraulic relay receives a hydraulic command. In the normally open (NO) model, the valve is open until the hydraulic relay receives a hydraulic command to close. Available Models Normally open and normally closed configurations are available. Operating pressure is up to 145 PSI (10 bar). A pressure regulating or pressure sustaining pilot may be used in conjunction with the hydraulic relay. Function The valve is activated by line pressure and controlled by the hydraulic relay. The relay includes a spring-loaded diaphragm that determines the pressure required to activate the command. In the normally closed operation (NC), the line pressure is connected to the valve’s control chamber keeping the valve closed. In the reverse case (NO), the valve remains in the open position. Control Mode Normally Closed Mode: In normally closed applications, when the command is received by way of port 1, the line pressure port 2 is prevented from entering the control chamber through the connection between port 2-4 and the water in the control chamber drains through port 3, causing the valve to open. Normally Open Mode: In normally open applications, port 3 connects to the upstream line pressure and water is prevented from entering the bonnet chamber. When the command is received by way of port 1, port 3 connects to port 4 and the valve closes.

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Basic Valve The basic valve can be operated manually through the use of a 3way selector. Selector options are: Closed: Upstream pressure or pressure from an external source is applied to the control chamber. The diaphragm is pressed down to close the valve drip-tight. Open: Discharging the water or air pressure to the atmosphere from the control chamber causing the valve to open. Automatic: The automatic port of the 3-way selector is connected to a solenoid, hydraulic relay or pilot which controls the valve. The common port of the 3-way selector connects the control chamber to either A (automatic), O (open) or C (closed), depending on the direction the selector is pointed.

3 Way Plastic Relay

Standard Valves Pressure Reducing

Maintains a constant downstream pressure regardless of upstream pressure or flow rate fluctuations. The set point of reduced pressure is adjustable by a 2-way or 3-way pilot valve. A spring-loaded diaphragm inside the pilot moves according to the downstream pressure changes. The pressure fluctuations are compensated by gradual opening and closing of the valve.

Pressure Sustaining/Relief

Maintains the minimum preset upstream pressure regardless of changes of pressure in the downstream or flow rate. Pressure relief is a sustaining valve that releases excess flow from the system.

Quick Reacting Pressure Relief

A safety valve that opens instantly, but closes slowly to protect the system against excessive pressure.

Manual

Opens and closes manually by means of a 3-way selector.

Electric

Valve opens or closes in response to an electric command using a 3-way solenoid.

Hydraulic Relay with Shastomit or Galit

A relay installed on the valve in the field is activated by a solenoid at the control station.

Pressure Reducing/Sustaining

The combined operation of the two pilots sustains a constant pressure upstream of the valve, and at the same time, reduces the downstream to a preset pressure. Both pilots have spring-loaded diaphragms. One pilot is sensitive to upstream pressure and the other to downstream pressure. The valve opens or closes gradually to maintain both required pressures simultaneously.

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Specialty Valves Altitude Control Valve

Used to maintain a preset water level in a reservoir or water tank. The valve is activated by line pressure according to the hydrostatic pressure. The valve stays open as long as the water level of the reservoir is below a preset level. As the water level rises, the valve gradually closes.

Electric Float Control Valve

The valve is a normally closed electric float control valve. A float hanging over the water surface at the desired height switches the electric circuit. When the water level drops below the float, the electric circuit is switched on and opens the valve through a solenoid valve. As the rising water reaches the float level, the circuit is disconnected and the valve closes.

Flow Rate Control Valve

The flow rate through the valve is determined indirectly using an orifice plate. Normally the valve is partially open to allow a preset constant flow rate. The pressure loss across the orifice is proportional to the actual flow rate. Upon increasing pressure loss, the valve is automatically piloted to close. When the pressure drops, the valve opens and the flow rate is maintained in spite of the line pressure fluctuations or the downstream demand.

Float Level Control Valve

Used to maintain a preset water level in a reservoir or water tank. The line pressure activates the valve. The valve stays open as long as the water level in the reservoir is below a preset level. As the water level rises and floats the pilot’s arm, the valve gradually closes.

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Water Works & Irrigation Solutions

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P.O. Box 880 Kiriat Malachi 83108 Israel Tel: +972 8 8601005 Fax: +972 8 8601006 E-mail [email protected] www.ooval.com 16