The G631 Series flow control servovalves are throttle valves for 3- and preferably 4-way applications. They are a medium performance, two-stage design that covers the range of rated flows from 1.0 to 20 gpm at 1,000 psi valve drop. 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 the spool position is provided by a cantilever spring. The valve design is simple and rugged for dependable, long life operation. These valves are suitable for electrohydraulic position, speed, pressure or force control systems with high dynamic response requirements.
The Moog G631 Series consists of medium performance, two-stage flow control servovalves designed for 3- and preferably 4-way applications. These valves feature a closed center, four-way sliding spool output stage and a symmetrical double-nozzle and flapper pilot stage driven by a dry torque motor. The design is intended for electrohydraulic position, speed, pressure, or force control systems requiring high dynamic response.
| Rated Flow (at 1,000 psi) | 1.0 to 20 gpm |
|---|---|
| Operating Pressure (Main stage) | 4,500 psi [315 bar] |
| Operating Pressure (Port T) | 2,000 psi [140 bar] |
| Temperature Range (Fluid) | -29˚ to 135˚C |
| Seal Material | Fluorocarbon (Viton) |
| Mounting Pattern | ISO 4401-05-05-0-94 |
| Degree of Protection | IP65 |
The recommended cleanliness class for normal operation is ISO 4406 < 16/13.
A servoamplifier that has high internal impedance, as obtained with current feedback, should be used.
The standard connector mates with MS3106F14S-2S or equivalent.