I. Basic Information (Official)

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

Model: D630-023A

Structure: Permanent magnet linear force motor + direct drive valve core + built-in LVDT position feedback + integrated amplifier

Function: 4-way, zero opening, flow/pressure closed-loop control

Electrical: 24 VDC power supply, standard ±10 V or 4–20 mA control signal

Installation: ISO 4401-03 (Size 03) installation surface

Status: In service, standard supply

II. Core Parameters (Typical Values)

Rated Flow: ~23 L/min (Δp=35 bar / each side)

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

Frequency Response (-3 dB): ≥200 Hz

Hysteresis: ≤1.0% (closed loop)

Resolution: ≤0.1%

Repeatability: ≤0.5%

Temperature Range: -20 ℃ ~ +60 ℃ (environment); -20 ℃ ~ +80 ℃ (oil)

Anti-pollution: High (no pilot hole, direct drive structure)

III. Key Features

Direct Acting without Pilot: Force motor directly drives the valve core, no pilot leakage, strong anti-pollution, long lifespan.

Integrated Closed-loop Control: Built-in LVDT + amplifier, directly connected to PLC, no need for external amplifier board.

High Dynamic, Low Hysteresis: High frequency response, small hysteresis, high resolution, suitable for precise motion / force control.

Small Volume, Low Power Consumption: ISO 03 installation, compact and easy to integrate.

IV. Typical Applications

Material / Structural Fatigue Test Bench (High frequency, small flow)

Precise Pressure Control (Injection molding, casting, hydraulic fixtures)

Small 6-DOF Platform, Vibration Table

Metallurgical Small Roll Gap Control, Tension Control

Industrial Robot Hydraulic Joint, Precise Synchronization

V. Model Meaning (D630)

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

023: Rated Flow 23 L/min (Δp=35 bar)

A: Valve Core / Electrical / Sealing Configuration Code