D634-518A
D634-518A is a pilotless single-stage 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 features pressure-independent dynamic performance and strong contamination resistance, applicable to medium and high pressure high-response closed-loop hydraulic systems.
Description
1. Product Brief
D634-518A is a pilotless single-stage 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 features pressure-independent dynamic performance and strong contamination resistance, applicable to medium and high pressure high-response closed-loop hydraulic systems.
2. Basic Information
Brand: MOOGModel: D634-518ACategory: 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 18-32VDC, max current 2.2AFeedback Type: Integrated LVDT spool position closed-loop detectionReset Mode: Spring centering, fail-safe neutral return after power lossProtection Class: IP65Weight: Approx. 6.3kgConnector: M18 6-pin with PE terminal
3. Function & Positioning
Core Function: Accurately control hydraulic flow and direction via analog signals, realize closed-loop regulation of position, velocity, pressure and thrust. It owns low hysteresis, high repeat precision and stable pressure-independent response.Product Positioning: Large flow high-precision model, designed for heavy-duty high dynamic industrial hydraulic working conditions.
4. Core Performance Parameters
Hydraulic Parameters
Max working pressure: 350barMax T-port pressure: ≤50bar (without Y port), ≤350bar (with Y port)Rated flow at 35bar pressure drop: 140L/minPeak flow: Approx. 230L/minNull internal leakage: 0.25-1.8L/minApplicable fluid: ISO11158 mineral oilFluid temperature: -20℃ ~ 80℃Fluid cleanliness: ISO4406 17/14/11
Dynamic Parameters
Full stroke step response: ≤8ms-3dB frequency bandwidth: 85-105HzHysteresis: ＜0.15% full scaleControl resolution: ＜0.06% full scaleTemperature drift: ＜1.0% full scale
Electrical Parameters
Standard control signal: ±10VDCOptional signal: ±10mA, 4-20mASpool feedback signal: 0-10VDCAmbient temperature: -20℃ ~ 60℃Certification: CE compliant
5. Matching Accessories
Shielded twisted signal cable, M18 waterproof connectorISO4401-05 standard mounting manifoldHigh precision hydraulic filter24VDC low ripple stabilized power supplyServo controller, displacement and pressure sensors
6. Application Fields
Large tonnage hydraulic press and forging equipmentHigh speed injection molding and die-casting machineryHigh frequency vibration and material fatigue test benchHigh power wind turbine pitch control systemAerospace and automotive motion simulation equipment
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