D634-554A
Description
Basic Information
Brand: MOOG
Model: D634‑554A
Series: D634 (Direct Drive Valve, DDV)
Type: Single‑stage, pilotless, direct‑operated servo valve
Mounting: ISO 4401‑05 (NG10)
Drive: Permanent magnet linear force motor
Feedback: Built‑in LVDT spool position closed loop
Electronics: Integrated 24 VDC PWM drive
Protection: IP65
Weight: Approx. 6.3 kg (13.9 lb)Moog Inc.
Hydraulic Specifications
Max working pressure (P/A/B): 350 bar (5,000 psi)Moog Inc.
Max T‑port pressure (no Y port): ≤50 bar (725 psi)Moog Inc.
Max T‑port pressure (with Y port): 350 bar (5,000 psi)Moog Inc.
Rated flow (Δp = 35 bar): 100 L/min (26.4 gpm)
Peak flow: ≈180 L/min (47.5 gpm)
Null leakage: 2.5–7 L/min
Fluid: ISO 11158 mineral hydraulic oil
Viscosity: 15–100 mm²/s (allowable 5–400 mm²/s)
Fluid temperature: −20 °C to +80 °C
Electrical Specifications
Supply voltage: 24 VDC (range 18–32 VDC)Moog Inc.
Max current: 2.2 A
Control signals: ±10 V, ±10 mA, 4–20 mAMoog Inc.
Connector: 6‑core + PE, IP65Moog Inc.
Electronics: SMD technology, PWM current output, EMC certified
Dynamic Performance (Typical)
Full‑stroke step response: ≤20 msMoog Inc.
−3 dB bandwidth: 15–25 Hz
Hysteresis: <0.25% of full scale
Resolution: <0.10% of full scale
Temperature drift (ΔT = 55 K): <1.5% of full scale
Key Features
Pilotless direct drive: No pilot oil needed; simpler piping, lower leakage, higher reliability.
Linear force motor: High, stable force; pressure‑independent dynamics.
LVDT closed‑loop feedback: High positioning accuracy and repeatability.
Spring centering: Fail‑safe return to neutral on power loss.
Low power consumption: Minimal heat at null.
High contamination resistance: Suitable for harsh industrial environments.
Applications
Medium‑large hydraulic presses & forging machines
Injection molding & die‑casting equipment
Vibration & fatigue test benches
Heavy‑duty industrial hydraulic systems
Precision position, force & speed closed‑loop control
Get a Quote