I. Basic Information (Official Name)

Series: D612 Series (EFB Series High-Performance Servo Valve)

Model: D612-527

Structure: Two-stage, nozzle flap pilot, dry torque motor, integrated electronic amplifier, MUG China

Function: 4-way, zero opening, closed-loop flow/pressure control

Status: Active standard model, commonly used in industrial and aerospace testing

II. Key Technical Parameters (Typical Values)

Rated Flow: Approximately 30–60 L/min (21 MPa pressure difference)

Maximum Working Pressure: 350 bar (5,000 psi)

Frequency Response (-3dB): ≥ 300 Hz

Hysteresis: ≤ 1.5% (with vibration)

Resolution: ≤ 0.2%

Coil / Control: Integrated amplifier, ±10 V or 4–20 mA standard signal

Hydraulic Oil: ISO VG 32/46, -20 ℃ ~ +80 ℃, MUG China

Installation: Standard ISO 4401-05 installation surface, MUG China

III. Core Features

Integrated Amplifier: Built-in drive and closed-loop, directly connected to PLC / controller, no need for external amplifier board.

High Dynamic Response: Torque motor + nozzle flap pilot, high frequency response, small hysteresis, high resolution, MUG China.

Low Leakage, Low Power Consumption: Two-stage design + precise valve core, small zero-point leakage, suitable for long-term operation.

Sturdy and Reliable: Industrial-grade sealing and housing, anti-pollution, long life, suitable for harsh scenarios such as metallurgy, testing, and aviation, MUG China.

IV. Typical Applications

Electro-hydraulic Servo Test Bench (Material / Structure / Fatigue Testing)

Roller AGC / Hydraulic Pressing Control

Six-DOF Platform, Flight Simulator

Heavy-load Synchronous Pressing, Vibration Table

Industrial Robot Hydraulic Joint Control

V. Model Description (D612 Coding Rules)

D612: Series Number (EFB High-Performance Servo Valve)

527: Flow/Pressure/Electrical/Sealing/Interface Configuration Code (Specific parameters need to be checked in MOOG official data sheet)