D634-406 belongs to MOOG D634 series pilotless direct drive servo valve, conforming to ISO4401-05 (NG10). Equipped with 24VDC integrated PWM drive and built-in LVDT position feedback, it adapts to 350bar high pressure and ultra-large flow, applicable for extreme heavy-duty closed-loop hydraulic systems.

Brand: MOOGModel: D634-406Category: Pilotless electro-hydraulic direct drive servo valveMounting Standard: ISO4401-05 (NG10)Drive Mode: Permanent magnet linear force motor, no pilot oil requiredPower Supply: 24VDC, working range 18-32VDCFeedback Type: Built-in LVDT spool closed-loop detectionReset Mode: Spring centering, automatic reset to neutral position after power failureProtection Class: IP65Weight: Approx. 13.0kgConnector: M18 6-pin with PE terminal

Core Function: Accurately control hydraulic flow and running direction through analog signals, realize closed-loop control of position, velocity, pressure and thrust. Featuring low internal leakage, strong anti-pollution performance and stable dynamic characteristics independent of pressure.Product Positioning: High-performance large flow model of the series, capable of replacing multi-stage valve assemblies to meet rigorous heavy-load working demands.

Max working pressure: 350barMax T-port pressure: ≤50bar (without Y port), ≤350bar (with Y port)Rated flow under 35bar pressure drop: 800-850L/minPeak flow: Approx. 950L/minNull internal leakage: ≤13.0L/minApplicable fluid: ISO11158 mineral oilFluid temperature range: -20℃ ~ 80℃Fluid cleanliness: ISO4406 17/14/11

Full stroke step response: ≤6ms-3dB frequency bandwidth: 130-140HzHysteresis: ＜0.09% full scaleControl resolution: ＜0.02% full scaleTemperature drift: ＜0.35% full scale

Max operating current: 8.3AStandard control signal: ±10VDCOptional control signal: ±10mA, 4-20mASpool feedback signal: 0-10VDCAmbient temperature: -20℃ ~ 60℃Certification: CE compliant

Shielded twisted signal cable, M18 waterproof connectorISO4401-05 standard valve mounting baseHigh precision hydraulic filter24VDC low ripple stabilized power supplyServo controller, displacement and pressure sensors

Heavy forging, extrusion and ultra-high pressure hydraulic equipmentAerospace and automotive structural strength test benchesHigh-load vibration test and motion simulation equipmentMarine and offshore engineering hydraulic control systemsLarge construction machinery and wind power hydraulic control devices