I. Basic Information

Series: D630 (Direct Drive DDV, without pilot stage)

Structure: Permanent magnet linear force motor + Direct Drive Valve Core + Built-in LVDT Position Feedback + Integrated Amplifier

Function: 4-way, zero opening, flow loop closed

Electrical: 24 VDC power supply, ±10 V / 4–20 mA control

Installation: ISO 4401-03 standard installation surface

Features: Z-type = Low internal leakage / Energy-saving configuration; A-type = Standard performance

II. Core Parameters (Typical Values)

Rated Flow: 67 L/min (Δp=35 bar / each side)

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

Frequency Response (-3 dB): ≥120 Hz

Hysteresis: ≤1.0% (closed loop)

Resolution: ≤0.1%

Internal Leakage: ≈1.2 L/min (zero position, Z-type low leakage)

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

Anti-pollution: Extremely high (without pilot small hole)

Protection / Anti-vibration: IP65; 30g three-axis vibration, 50g impact

III. Model Meaning

D630: Direct Drive Force Motor Servo Valve Series (DDV)

Z: Low internal leakage / Energy-saving configuration (Optimized valve core gap, reduced zero position leakage)

067: Rated Flow 67 L/min (Δp=35 bar)

A: Standard performance version (Sealing, material universal configuration)

IV. Key Features

Direct Drive without Pilot: Force motor direct drive valve core, no pilot leakage, strong anti-pollution, long life

Z-type Low Internal Leakage: Lower zero position leakage, energy-saving, low heat generation, suitable for continuous operation systems

Full Integrated Closed Loop: Built-in LVDT + amplifier, directly connected to PLC, no need for external amplification board

Medium Flow High Frequency: 67 L/min, 120 Hz frequency response, balancing flow and dynamic performance

V. Typical Applications

Small and medium-sized structural fatigue test bench, multi-channel loading system

High-pressure hydraulic vibration table, small and medium-sized servo actuators

Metallurgical small and medium-sized rolling mill roll gap control, tension control

Industrial high-pressure precision synchronous lifting, force control system, injection molding machine

Machine tool high-speed hydraulic spindle, precise feed control