Overview
The MOOG S20FOFM4VBR is an electro-hydraulic servo valve rated for 3000 PSI operation, engineered for closed-loop precision control in industrial hydraulic systems. This servo valve incorporates mechanical spool position feedback which provides flow or pressure outputs proportional to electrical input. MOOG Servo Valves without onboard electronics are the classic design known as the ultimate choice for performance and reliability since 1951. The 191R designation and 062F105C part number indicate a specific industrial configuration suited for demanding control applications.
Key Features
- Precision Flow Control: Servo valves are continuous valves with output variables proportional to the input signal, achieved through feedback of the spool position into a mechanical or electrical control loop.
- High Pressure Rating: 3000 PSI maximum operating pressure for demanding hydraulic systems
- Mechanical Feedback (MFB): Closed loop spool position control with mechanical feedback for superior performance and reliability.
- Robust Construction: Industrial-grade design for long-term reliability in production environments
- Multi-Function Capability: MOOG valves enable high-precision control of position, velocity, pressure and force in a wide range of applications.
Technical Specifications
The MOOG S20FOFM4VBR is a two-stage, flow-control electro-hydraulic servo valve with integrated torque motor and mechanical position feedback. The valve’s nozzle-flapper design is a reliable and proven technology for applications requiring high response, stability and accuracy within a compact package.
Typical Applications
- Industrial process machinery and automation
- Machine tool servo systems requiring precise axis control
- Hydraulic test stands and laboratory equipment
- Pressure and flow regulation in closed-loop systems
- OEM integrated motion control systems
- Aerospace and defense subsystems requiring high reliability
Compatibility & Replacements
Compatible With
- Industrial servo amplifiers and electronics modules
- Analog command signal controllers (proportional input)
- Mechanical feedback transducers and LVDT sensors
- ISO NG10 cavity mounting plates (where applicable)
- Hydraulic systems operating 200–3000 PSI
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. MOOG part number 062F105C may replace earlier generation S20 series configurations, but direct substitution requires engineering review of spool geometry, flow rating, and control law specifications.
Works With
- Standard industrial servo amplifiers (current-input, high-impedance)
- Dither signal generators for friction reduction (optional)
- Proportional directional control systems
- Closed-loop feedback control systems (position, pressure, velocity)
- ISO 4401 cavity configurations (confirm with local distributor)
