D634-525A is a pilotless single-stage direct-drive servo valve of MOOG D634 series with ISO4401-05 (NG10) mounting. Equipped with 24VDC integrated PWM drive and LVDT spool feedback, it features pressure-independent dynamic performance and strong contamination resistance.

Brand: MOOGModel: D634-525AType: Pilotless electro-hydraulic direct drive servo valveMounting: ISO4401-05 (NG10)Drive: Permanent magnet linear force motor, no pilot oil requiredPower supply: 24VDC, 18-32VDC operating range, max current 2.2AFeedback: Integrated LVDT spool closed-loop position detectionReset: Spring centering, fail-safe neutral position after power offProtection grade: IP65Weight: Approx. 6.8kgConnector: M18 6-pin with PE terminal

Max working pressure: 350barMax T-port pressure: ≤50barRated flow at 35bar pressure drop: 120L/minPeak flow: 185L/minNull leakage: 0.4-2.5L/minHydraulic fluid: ISO11158 mineral oilFluid temperature: -20℃ ~ 80℃Fluid cleanliness: ISO4406 17/14/11

Full stroke step response: ≤22ms-3dB bandwidth: 45-65HzHysteresis: ＜0.25% full scaleResolution: ＜0.10% full scaleTemperature drift: ＜1.5% full scale

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

No pilot oil structure enhances operational reliabilityClosed-loop LVDT feedback ensures high control precisionStable dynamic response unaffected by pressure changeEnergy-saving 24VDC driving systemSafe spring return design under power failure

Heavy-duty hydraulic press and forging machineryLarge injection molding and die-casting equipmentHigh displacement vibration and fatigue test benchHigh flow industrial hydraulic control systemPrecision position, speed and pressure closed-loop control