Proven performance and reliability for aircraft engine flow and pressure applications
Contents Electro-Hydraulic Servo Valves Series I EHSV��������������������������������3 Series II EHSV�������������������������������4 Series III EHSV�������������������������������5 Electro-Hydraulic Valves
Electro-Hydraulic Servo Valves (EHSV) Honeywell’s EHSVs represent a standardized, minimum weight design approach, applicable to meet a wide range of flow, pressure, and interface requirements. With over 1.2 billion flight hours accumulated, Honeywell’s EHSVs have delivered proven performance and unsurpassed reliability in the severe environments encountered in aircraft engine applications.
Robust armature support structure eliminates vibration sensitivity
■■
Elastomeric pivot seal eliminates flexure sleeve and need for damping fluid
■■
Floating second stage sleeve eliminates binding due to clamp loads and thermal transients
■■
Integrated second stage feedback device option
Honeywell can provide designs to meet specific customer requirements.
2
aerospace.honeywell.com
Tel. 1.770.262.9200
Electro-Hydraulic Servo Valves (EHSV)
Series I EHSV
General Specification and Characteristics
Type I EHSV Dynamic Response (Gain)
2.00
2-Stage, 4-Way, Jet-Pipe
0.00
Rated Flow:
0.5 to 10 CIS at 300 PSID
-2.00
Supply Pressure:
Up to 1500 PSIG
Chip Shear Force:
> 30 lbf. at 300 PSID
Internal Leakage:
0.44 CIS maximum at 300°F, 300 PSID and 10 CIS
Hysteresis:
4% of rated current Maximum
Threshold:
1% of rated current Maximum
Linearity:
10% of rated current Maximum
Weight:
0.85 lbs. Maximum
Attenuation (dB)
Product:
-4.00 -6.00 -8.00
-10.00 -12.00
0.1
90.00
1.0
Frequency (Hz)
10
100
Type I EHSV Dynamic Response (Phase)
80.00 70.00
Phase (Deg)
60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.1
1.0
Frequency (Hz)
10
100
Valve Rated at 30 CIS at 300 PSID
Tel. 1.770.262.9200
aerospace.honeywell.com
3
Electro-Hydraulic Servo Valves (EHSV)
Series II EHSV
General Specification and Characteristics
Type II EHSV Dynamic Response (Gain)
2.00
Product:
2-Stage, 4-Way, Jet-Pipe
Rated Flow:
1.0 to 30 CIS at 300 PSID
Supply Pressure:
Up to 1500 PSIG
Chip Shear Force:
> 40 lbf. at 300 PSID
Internal Leakage:
0.62 CIS maximum at 300°F, 300 PSID and 30 CIS
Hysteresis:
4% of rated current Maximum
-10.00
Threshold:
1% of rated current Maximum
-12.00
Linearity:
10% of rated current Maximum
Weight:
1.25 lbs. Maximum
0.00
Attenuation (dB)
-2.00 -4.00 -6.00 -8.00
0.1
1.0
Frequency (Hz)
10
100
Type II EHSV Dynamic Response (Phase)
90.00 80.00
Phase (Deg)
70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00
0.1
1.0
Frequency (Hz)
10
100
Valve Rated at 30 CIS at 300 PSID
4
aerospace.honeywell.com
Tel. 1.770.262.9200
Electro-Hydraulic Servo Valves (EHSV)
Series III EHSV
General Specification and Characteristics
Type III EHSV Dynamic Response (Gain)
2.00
2-Stage, 4-Way, Jet-Pipe
0.00
Rated Flow:
1.0 to 40 CIS at 300 PSID
-2.00
Supply Pressure:
Up to 1500 PSIG
Chip Shear Force:
> 40 lbf. at 300 PSID
Internal Leakage:
0.71 CIS maximum at 300°F, 300 PSID and 40 CIS
Hysteresis:
4% of rated current Maximum
Threshold:
1% of rated current Maximum
Linearity:
10% of rated current Maximum
Weight:
1.40 lbs. Maximum
Attenuation (dB)
Product:
-4.00 -6.00 -8.00
-10.00 -12.00
0.1
90.00
1.0
Frequency (Hz)
10
100
Type III EHSV Dynamic Response (Phase)
80.00 70.00
Phase (Deg)
60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.1
1.0
Frequency (Hz)
10
100
Valve Rated at 40 CIS at 300 PSID
Tel. 1.770.262.9200
aerospace.honeywell.com
5
Electro-Hydraulic Valves (EHVs) Configurations ■■
Typical Applications
Three-Way Nozzle Flapper
■■
Single-Stage ■■
Two-Position Nozzle Flapper Single-Stage
■■
■■
Fuel Metering (Three-way
General Specifications and Features
Nozzle Flapper and Post Clevis)
■■
Temperature Range: -65 to 350°F
Fuel Shut-off (Two-Position
■■
Pressure Range: Up to 1500 PSI
■■
Flow Range: Up to 5.0 CIS
■■
Fluids: Hydraulic Oil or Jet Fuel
Nozzle Flapper)
Variable Two-Way Post Clevis Single-Stage
Honeywell can provide designs to meet specific customer requirements.
Post Clevis EHV
General Specification and Characteristics Product:
Single-Stage, Variable 2-Way, Post Clevis
Rated Flow:
Up to 4.45 CIS at 50 ±0.5 PSID
Supply Pressure:
Up to 1150 PSIG
Step Response:
< 35 milliseconds
Weight:
0.87 lbs. Maximum
6
aerospace.honeywell.com
Tel. 1.770.262.9200
Electro-Hydraulic Valves (EHV)
2-Position Nozzle Flapper EHV
General Specification and Characteristics Product:
Single-Stage, 2-Position, Nozzle Flapper
Rated Supply Pressure:
1200 PSIG
Flow Capability (Open):
1.25 CIS Minimum at 150 PSID
Internal Leakage (Close):
150 CC/H MAXIMUM AT 1000 PSID
Dynamic Response (Open):
< 5 milliseconds
Dynamic Response (Close):
< 10 milliseconds
Weight:
0.75 lbs. Maximum
3-Way Nozzle Flapper EHV
General Specification and Characteristics Product:
Single-Stage, 3-Way, Nozzle Flapper
Rated Flow:
0.35 CIS at 250 PSID
Rated Differential Pressure:
250 PSID
Hysteresis:
1.5% of rated current Maximum
Equivalent 1st Order Constant:
< 5 milliseconds
Weight:
0.75 lbs. Maximum
Tel. 1.770.262.9200
aerospace.honeywell.com
7
Next Generation EHSV Technology Honeywell is currently refining the EHSV technology roadmap and our future product line investments will be based upon customer input. New product development will tentatively be targeting: ■■
Improved reliability
■■
Better FOD resistance
■■
Reduced cost / time-to-market
■■
Less internal leakage
■■
Fail-fixed / fail-safe designs
■■
Higher temperature and vibration capability
Honeywell Aerospace 944 East Sky Harbor Circle Phoenix, AZ 85034 U.S. Toll Free: 1.800.601.3099 International: 1.602.365.3099 aerospace.honeywell.com
