MOOG G761‑3002B

Maximum Operating Pressure: 310 bar 100 % Step Response: 6‑9 ms Frequency Response: 120‑230 Hz Rated Drive Signal: ±40 mA Mounting Standard: ISO 10372‑04‑04‑0‑92 Neutral‑position Leakage: Less than 1.5 L/min

Functional Features:

Nozzle‑flapper pilot‑stage structure delivers high dynamic response, high resolution and low hysteresis. Mechanical cantilever spring feedback implements spool position closed‑loop without external electronic feedback. High‑spool‑driving‑force rugged mechanical structure realizes long‑life continuous operation. Symmetrical four‑way zero‑overlap spool configuration. Built‑in detachable self‑flushing filter reduces pilot‑stage blockage risk.

Application Scenarios:

Aerospace test equipment, material test machines, flight simulators, high‑speed hydraulic test benches, metallurgical rolling mill control, precision fatigue test systems, weapon‑simulation hydraulic platforms.

Working Principle:

Polarized torque motor deflects armature‑flapper assembly under input current signal. Flapper changes differential pressure of two nozzles to drive second‑stage four‑way spool displacement. Cantilever feedback spring generates reverse feedback torque proportional to spool displacement. Spool stops moving when feedback torque balances motor input torque, and output flow is proportional to input drive current.

Material Composition:

Aluminum alloy valve body, hardened alloy steel spool and sleeve, flexure tube alloy spring steel, permanent magnet magnetic steel, copper motor coils, stainless‑steel filter element.

Structural Characteristics:

Two‑stage hydraulic amplification structure, torque‑motor electrical isolation flexure‑tube seal, mechanical feedback cantilever spring, external electrical circular connector, manifold‑mount valve‑port layout.

Installation Requirements:

Install on standard ISO manifold mounting surface. Ensure hydraulic oil cleanliness reaches NAS 1638‑6 or better. Mount valve without mechanical stress on housing. Torque mounting bolts per factory specification. Use shielded twisted‑pair cable for electrical connection.

Usage Notes:

Strictly control hydraulic oil contamination level. Avoid impact load on valve housing. Do not apply excessive mechanical force to electrical connector. Complete flushing before commissioning. Prevent oil‑liquid cavitation and pressure‑shock impact.