Brand: MOOGModel: D634-550Series: D634 DDVStructure: Single-stage pilotless direct drive servo valveMounting Standard: ISO4401-05 (NG10)Drive Type: Permanent magnet linear force motorFeedback Mode: Integrated LVDT spool position closed-loop feedbackPower Drive: Built-in 24VDC PWM driveProtection Class: IP65Net Weight: Approximately 6.3kg

Maximum working pressure: 350barMax T-port pressure: ≤50bar, 350bar optional with Y portRated flow under 35bar pressure drop: 150L/minPeak flow: 220L/minNull leakage: 2.5-7L/minApplicable fluid: ISO11158 mineral hydraulic oilFluid viscosity: 15-100mm²/s, allowable 5-400mm²/sOperating fluid temperature: -20℃ ~ 80℃

Supply voltage: 24VDC, working range 18-32VDCMaximum working current: 2.5AControl signal: ±10V, ±10mA, 4-20mAConnector specification: 6-core plus PE terminalElectronic feature: SMD technology, PWM current output, EMC certified

Full stroke step response: ≤22ms-3dB frequency bandwidth: 18-32HzHysteresis: ＜0.25% full scaleResolution: ＜0.10% full scaleTemperature drift: ＜1.5% full scale

Pilotless design simplifies hydraulic circuit, reduces leakage and improves operational reliability.Bidirectional linear force motor maintains stable output regardless of oil supply pressure.Real-time LVDT position feedback ensures high control accuracy and repeatability.Spring centering structure realizes automatic neutral reset for safe power-off protection.Low power consumption and heat generation under zero flow condition.Strong contamination resistance, suitable for harsh industrial working conditions.

Large hydraulic press and forging equipmentMedium and large injection molding and die casting machinesMulti-axis vibration and fatigue test benchesMetallurgical heavy industrial hydraulic systemsHigh-precision position, force and speed closed-loop control equipment