1. General Description

• Series: D634 (ISO 4401‑05 / NG10)

• Model 1037: higher flow, standard dynamic, low internal leakage

• Typical applications: medium‑to‑high flow test benches, hydraulic presses, material fatigue rigs, and closed‑loop systems needing higher flow + good dynamics + low leakage.

2. Hydraulic Specifications

• Max working pressure (P, A, B): 350 bar (5,000 psi)

• T‑port pressure: 50 bar (no Y‑port); 350 bar (with Y‑port)Moog Inc.

• Rated flow (Δp = 35 bar per land): 95–100 L/min (25.1–26.4 gpm)

• Max flow: approx. 190 L/min (50.2 gpm)

• Internal leakage: ≤0.50 L/min

• Fluid: mineral oil per ISO 11158 / DIN 51524

• Fluid temp: −20 °C to +80 °C

• Filtration: ISO 4406 17/14/11 or better

3. Performance Characteristics

• Step response (0→100% stroke): 14–16 ms

• −3 dB bandwidth: 90–100 Hz

• Hysteresis: <0.40% FS

• Resolution: <0.10% FS

• Null drift (60 K change): <1.0% FS

• Repeatability: ≤0.25% FS

4. Electrical Specifications

• Supply voltage: 24 VDC (18–32 VDC range)Moog Inc.

• Max operating current: 3.2 A

• Command signals (jumper‑selectable): ±10 V, ±10 mA, 4–20 mAMoog Inc.

• Spool position feedback: 0–10 VDC (standard)

• Connector: M18, 6‑pin + PE, IP65

• Ambient temp: −20 °C to +60 °C

• EMC: compliant with CE directives

5. Mechanical & Installation

• Mounting: ISO 4401 Size 05 (NG10) pattern

• Weight: approx. 6.3 kg (13.9 lb)

• Installation: horizontal recommended; clean mounting surface; bleed air from valve and lines before commissioning

6. Pinout (M18 Connector)

1. +24 VDC

2. Power GND

3. Command +

4. Command −

5. Spool position feedback (0–10 V)

6. Feedback GND

   PE: Protective Earth (chassis ground)

7. Key Features (vs D634‑1036)

• Higher rated flow: ~100 L/min vs 75–85 L/min

• Slightly slower dynamics: ~15 ms step vs 13–15 ms

• Marginally higher leakage: ≤0.50 vs ≤0.45 L/min