728 Series Servo Valves
Direct-Operated Flow Control for Analog Signals
- 2-stage flow control Mechanical Feedback Valve
- Nozzle flapper pilot stage for high dynamics, high resolution and low hysteresis
- "Simulator" spool cut minimizes pressure change and "bump" through the zero flow null position
- High spool driving forces, rugged design ensures long-life operation
- Optional integrated abort manifold/end cap to control motion of actuator to home position in the event of an abort signal
- Optional asymmetric flow ratios matched to actuator cylinder requirements
| Specifications | |
|---|---|
| Hydraulic Data | |
| Rated Flow* |
225 to 300 l/min (60 to 78 gpm) |
| Standard Configurations | 225, 300 l/min (60, 78 gpm) |
| Max. Operating Pressure | 210 bar (3,000 psi) |
| Performance Data | |
| 100% Step Response** | 60 ms |
| Frequency Response*** | 35 to 45 Hz |
| Electrical Data | |
| Rated Signal**** | 20 to 60 mA |
| Standard Configurations | 20, 40, 60 mA |
| Physical Data | |
| Size (Mounting Pattern) |
Moog Standard |
| Weight | 20.4 kg (45 lbs) |
| Additional 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
Contact Moog Industrial
Product Service & Repairs
Literature
Product Line Overview - Mechanical Feedback Servo Valves
Typical Applications
Legacy valve replacements: Pegasys PLS 2957
