General

• Series: D634 (ISO 4401 Size 05 / NG10)

• Type: Single‑stage direct‑drive servo valve (DDV), 24 VDC integrated electronics, LVDT spool closed‑loop

• Model 1023: High‑flow, medium‑dynamic version, optimized for general‑purpose high‑flow applications; balances flow capacity, response, and cost for medium‑speed, high‑force hydraulic systems.

Hydraulic Data

• Max pressure (P, A, B): 350 bar (5,000 psi)Moog Inc.

• Port T (no Y): 50 bar (725 psi); (with Y): 350 barMoog Inc.

• Rated flow (Δp = 35 bar/land): 60–80 L/min (15.9–21.1 gpm)

• Max flow: ≈170 L/min (44.9 gpm)

• Internal leakage: ≤0.45 L/min

• Fluid: Mineral oil ISO 11158 / DIN 51524

• Fluid temp: −20 … +80 °C

• Cleanliness: ISO 4406 18/15/12 (recommended 17/14/11)

Performance (Typical for 1023)

• Step response (0→100%): ≈18 msMoog Inc.

• Hysteresis: <0.4% FS

• Resolution: <0.10% FS

• Null drift (ΔT = 60 K): <1.0%

• Frequency response (−3 dB): ≥80 HzMoog Inc.

Electrical Data

• Supply: 24 VDC (18–32 VDC)Moog Inc.

• Max current: 2.6 A

• Control signals (jumper select): ±10 V, ±10 mA, 4–20 mAMoog Inc.

• Spool feedback output: 0–10 VDC

• Connector: M18, 6+PE, IP65Moog Inc.

• Ambient temp: −20 … +60 °C

Key Features

• Medium‑fast step response (18 ms) for balanced dynamic performance

• High rated flow (60–80 L/min) for general high‑flow needs

• Closed‑loop LVDT feedback ensures accurate spool positioning

• Spring‑centered fail‑safe design (spool returns to neutral on power loss)

• Cost‑effective for medium‑dynamic, high‑volume applications

Applications