Spool hydraulic directional control valve 728

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Product description
The valves of the Series 728 from Moog are high-flow, two-stage servo valves intended for use in motion-simulation applications requiring high flow. These valves are typically configured to specific application requirements.

Features

• 2-stage flow control with mechanical feedback
• Nozzle‑flapper pilot stage for high dynamics, high resolution and low hysteresis
• The simulator coil minimizes pressure transients and shocks at the zero-flow position
• High coil drive forces and robust design ensure long service life
• Optional integrated dump valve/end cap to drive the actuator to neutral on a failure signal
• Optional asymmetric flow ratios, tailored to actuator requirements

Specifications
Hydraulic data
Rated flow*: 225 to 300 l/min
Standard configurations: 225, 300 l/min
Max. operating pressure: 210 bar

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
Other options: Flow, pressure and other options available

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

Resources (excerpt)
Product catalog and technical literature are available as PDF documents.