I. Basic Information

Series: D630 (Two-stage Pilot-operated Servo Valve, ServoJet Jet Pipe Pilot)

Structure: Permanent Magnet Torque Motor + Jet Pipe Pilot Stage + Main Valve Core + LVDT Position Feedback + Integrated Amplifier

Function: 4-way, Zero Opening, Flow Closed Loop (Optional Pressure Closed Loop)

Electrical: 24 VDC Power Supply, ±10 V / 4–20 mA Control

Installation: ISO 4401-05 (Size 05, Large Installation Surface)

Status: In Service, Industrial Standard High Flow Model

II. Core Parameters (Typical Values)

Rated Flow: 272 L/min (Δp=35 bar / Each Side)

Maximum Working Pressure: 350 bar (5,000 psi)

Frequency Response (-3 dB): ≥ 80–100 Hz (High Response at High Flow)

Hysteresis: ≤ 1.5% (Closed Loop)

Resolution: ≤ 0.2%

Repeatability Precision: ≤ 0.5%

Internal Leakage: ≈ 3–4 L/min (Zero Position)

Temperature Range: Ambient -20 ℃ ~ +60 ℃; Oil -20 ℃ ~ +80 ℃

Anti-Pollution: Medium (Pilot Stage Requires Clean Oil, Recommended NAS 6–7 Grade)

III. Model Meaning

D630: Two-stage Jet Pipe Pilot Servo Valve Series

272: Rated Flow 272 L/min (Δp=35 bar)

D: Main Valve Core / Seal / Electrical Configuration Code (High Flow High Pressure Version)

IV. Key Features

Super Large Flow Two-stage Design: 272 L/min is the top flow setting of the D630 Series, meeting heavy-duty, high-power hydraulic requirements

ServoJet Jet Pipe Pilot: Superior Anti-Pollution to Nozzle Baffle, No Blockage Risk, Long Lifespan, High Reliability

Full Integrated Closed Loop: Built-in LVDT + Amplifier, Directly Connected to PLC, No Need for External Amplifier Board

High Pressure Heavy Duty Compatibility: 350 bar High Pressure, Suitable for Large Heavy-Duty, High-Pressure Precise Control

V. Typical Applications

Large Structure / Component Fatigue Test Bench (Heavy-duty Multi-channel Loading)

Heavy-duty Hydraulic Vibration Bench, Multi-degree-of-freedom Motion Platform

Metallurgical Large Rolling Mill Roll Gap Control, Thick Plate / Special Steel Tension Control

Ship / Marine Engineering Heavy-duty Hydraulic Actuator, Dynamic Positioning System

Industrial Large Hydraulic Press, Synchronous Lifting System, Force Control System