D634-511 is a pilotless direct drive servo valve of MOOG D634 series, compliant with ISO4401-05 (NG10). Equipped with 24VDC integrated PWM drive and built-in LVDT spool feedback. It has pressure independent dynamic performance and good contamination resistance, suitable for high-power high-precision closed-loop hydraulic systems.

Brand: MOOGModel: D634-511Category: Pilotless electro-hydraulic direct drive servo valveMounting Standard: ISO4401-05 (NG10)Drive Mode: Permanent magnet linear force motor, no pilot oil requiredPower Supply: 24VDC, operating range 18-32VDCFeedback: Built-in LVDT closed-loop position detectionReset Mode: Spring centering, auto return to neutral after power cutProtection Class: IP65Weight: Approx. 6.3kgConnector: M18 6-pin with PE terminal

Core Function: Achieve accurate flow and direction control by analog signals, realize closed-loop control of position, velocity, pressure and thrust. Features low hysteresis, fine repeatability and stable dynamic performance irrelevant to pressure variation.Product Positioning: High flow dynamic type valve, applicable to heavy-duty working conditions requiring sustained large flow and steady control accuracy.

Max working pressure: 350barMax T-port pressure: ≤50bar (without Y port), ≤350bar (with Y port)Rated flow under 35bar pressure drop: 120L/minPeak flow: Approx. 195L/minNull internal leakage: 0.2-1.6L/minApplicable fluid: ISO11158 mineral oilFluid temperature: -20℃ ~ 80℃Fluid cleanliness: ISO4406 17/14/11

Full stroke step response: ≤9ms-3dB frequency bandwidth: 75-95HzHysteresis: ＜0.11% full scaleControl resolution: ＜0.05% full scaleTemperature drift: ＜0.9% full scale

Standard control signal: ±10VDCOptional signal: ±10mA, 4-20mASpool feedback signal: 0-10VDCAmbient temperature: -20℃ ~ 60℃Certification: CE compliant

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

High force hydraulic pressing equipmentLarge injection molding and die casting machineryHigh frequency vibration and material fatigue test benchWind power pitch control systemHeavy forging and extrusion production linesAerospace vehicle motion simulation facilities