Moog Servo Proportional Valves
MOOG Servo Valves G761 Series
  • Description
  • Technique Feature
  • Specification
  • Applied Range

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Moog ServoValves G761 and 761Series Catalog

MOOG model of Servo Valves G761 Series

 

MOOG G761 Series Servo Valves Description

MOOG servo valve is a top brand in electro-hydraulic servo control field, which is receives the analog electrical signal then outputs the flow and pressure of the corresponding output modulation. Electro-hydraulic servo valve has many advantages, such as fast dynamic response, high control accuracy and long service life. It has been widely applied in electro hydraulic servo control system in steel plant, cement plant, test machine, power plant, aviation, aerospace, ship, metallurgy, chemical industry and other industrial fields.

MOOG G761/761 Series flow control servovalves are throttle valves for 3 and preferably 4-way applications. They are a high performance, 2-stage design that covers the range of rated flows from 4 to 63 l/min (1 to 16.5 gpm) at 35 bar (500 psi) valve pressure drop per spool land. MOOG G761 valves are suitable for electrohydraulic position, speed, pressure or force control systems with high dynamic response requirements.

The output stage is a closed center, four-way sliding spool. The pilot stage is a symmetrical double-nozzle and flapper, driven by a double air gap, dry torque motor. Mechanical feedback of spool position is provided by a cantilever spring. The valve design is simple and rugged for dependable, long life operation.

The design of MOOG G761 valve is simple and rugged for dependable, long life operation. The output stage is a closed center, 4 way sliding spool. The pilot stage is comprised of a symmetrical, double nozzle dry torque motor. The 2nd stage spool position is controlled by a carbide tipped feedback wire. The carbide ball on the end of the feedback wire is a mandatory design requirement that ensures high accuracy, reliable operation and long service life. All of our servo valves are known for high accuracy and reliable operation even in the harshest industrial applications.

HEASH TECH supply MOOG Direct Operated Servo Valves G761 Series have many types, like as G761-3001B, G761-3002B, G761-3003B, G761-3004B, G761-3005B, G761-3006B, G761-3007B, G761-3008B, G761-3009B, G761-3025B, G761-3051B, G761-3009A, G761-3033B, G761-3051B, G761-3025, G761-3052B, G761-3016, G761-3600, etc.

MOOG Servo Valve G761 Series Technical Data

Valve design 2-stage, with spool and busing and dry torque motor
Pilot stage Nozzle Flapper
Mounting pattern ISO 10372-04-04-0-92
Installation position Any orientation, fixed or movable
Weight 1.08 kg (2.4 lb)
Storage temperature range -40 to +60 °C (-40 to +140 °F)
Ambient temperature range -40 to +135 °C (-40 to +275 °F)
Vibration resistance 30 g, 3 axis, 10 Hz to 2 kHz
Shock resistance 30 g, 3 axis
Seal material Fluorocarbon (FKM) 85 SHORE D
Others upon request

 

Hydraulic Data

Maximum operating pressure to ports P, T, A, B, X 315 bar (4,500 psi)
Rated flow at p35 bar/spool land (500 psi/spool land) 4/10/19/38/63 l/min (1/2.5/5/10/16.5 gpm)
Maximum main stage leakage flow rate (zero lap) 2.3 l/min (0.60 gpm)
Null adjust authority Greater than 10% of rated flow
Hydraulic fluid Hydraulic oil as per DIN 51524 parts 1 to 3 and ISO 11158.
Other fluids on request.
Temperature range -40 to +60 °C (-40 to +140 °F)
Recommended viscosity range 10 to 97 mm2/s (cSt)
Maximum permissible viscosity range 5 to 1,250 mm2/s (cSt)
Recommended cleanliness class as per ISO 4406  
For functional safety 17/14/11
For longer life 15/13/10
Recommended filter rating  
For functional safety ß10≤ 75 (10µm absolute)
For longer life ß≤ 75 (5 µm absolute)

 

Static and Dynamic Data

Rated Flow 4 l/min 
(1 gpm)
10 l/min 
(2.5 gpm)
19 l/min 
(5 gpm)
38 l/min 
(10 gpm)
63 l/min
(16.5 gpm)
Tolerance of rated flow ± 10% of rated flow
Step response time for 0 to 100% stroke 5 ms 5 ms 5 ms 7 ms 16 ms
Threshold ≤ 0.5% of rated signal
Hysteresis ≤ 3.0% of rated signal
Null shift at ∆ T = 38°C (100°C) ≤ 2.0% of rated signal

 

 

MOOG G761 and 761 Series Direct-Operated Servo Valves Feature

- 2-stage design with nozzle flapper pilot stage and mechanical feedback offers high dynamics,  high resolution and low hysteresis

- High spool driving forces, rugged design ensures long-life operation

- Compact design allows applications with limited footprint

- Instrinsically-safe (K) version available for applications requring products certified for potentially hazardous environments

 

MOOG G761 Hydraulic Data

Rated Flow: 4 to 64 l/min (1 to 17 gpm) @ ∆p 70 bar (1000 psi)

Maximum Operating Pressure: 310 bar (4,500 psi)

Mounting Pattern: ISO 10372-04-04-0-92

100% Step Response: 0.875” port circle. 6 to 9 ms @ 210 bar (3,000 psi)

 

MOOG G761 Electrical Data

Supply Voltage N/A

Rated Signal Options: +/-15, +/-40 and +/-200 mA

Additional Options: Contact Industrial Application Engineering for additional Flow, Pressure, and Signal options

G761 and 761 Series Direct-Operated Servo Valves for Analog Signals

- 2-stage design with nozzle flapper pilot stage and mechanical feedback offers high dynamics,  high resolution and low hysteresis

- High spool driving forces, rugged design ensures long-life operation

- Compact design allows applications with limited footprint

- Instrinsically-safe (K) version available for applications requring products certified for potentially hazardous environments

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