743 and 744 Series Servo Valves

Direct-Operated Flow Control for Analog Signals

  • 2-stage flow control mechanical feedback valve
  • Nozzle flapper pilot stage for high resolution and low hysteresis
  • High spool driving forces, rugged design ensures long-life operation
  • Instrinsically-safe version available for applications requring products certified for potentially hazardous environments
  • Optional three coil pilot configuration for added protection against coil failure 
  • Field replaceable pilot stage filter
  • Optional failsafe methods ensure reliable and predictable actuator motion in the event of signal loss
  • Designed to meet all requirements of General Electric Specification 351A7620
Specifications
     
Hydraulic Data 743 744
Rated Flow* 75 to 95  l/min
(20 to 25 gpm)
190 to 400  l/min
(50 to 100 gpm)
Standard Configurations 95 l/min
(25 gpm)
190, 265 l/min
(50, 70 gpm)
Max. Operating Pressure 210 bar
(3,000 psi)
210 bar
(3,000 psi)
     
Performance Data    
100% Step Response** 25 ms 110 to 170 ms
Frequency Response*** 45 Hz 7 Hz
     
Electrical Data    
Rated Signal**** 8 to 60 mA 17 to 96 mA
Standard Configurations 16, 48 mA  17, 34.5, 96 mA 
     
Physical Data    
Size
(Mounting Pattern)
Moog Standard Moog Standard
Weight 1.54 kg (3.4 lbs) 8.38 kg (18.5 lbs)
Additional Options

Intrinsically Safe, Magnetic Null Adjust, Vented Motor Cap, Reverse Polarity

Contact Industrial Application Engineering for additional Flow, Pressure and other options

 

Contact Industrial Application Engineering for additional Flow, Pressure and other options

* @ ∆p 70 bar (1,000 psi)
** Response at 3,000 psi System Pressure
*** at 90° Phase Lag
**** Single Coil