I. Core Parameters (Official Standard Version)

1) Basic Specifications

Model: D633‑410B (Direct Acting Servo Valve DDV)

Installation Specifications: NG6 / ISO 4401‑03

Rated Flow: 40 L/min @ Δp=35 bar

Working Pressure:

P/A/B: 350 bar

T Port: ≤50 bar (No Y Port, Low Pressure Return Oil)

Frequency Response: 80–120 Hz (Standard Industrial Grade)

Step Response: <20 ms (0→100%)

Sealing: NBR (−20～+80℃)

Hysteresis: <0.2%

Resolution: <0.1%

Power Supply: 24VDC (18–32V) Moog Inc.

Control Signal: ±10V / 4–20mA Moog Inc.

Feedback: Built-in LVDT Valve Core Position Closed Loop

Neutral Function: O Type (Three-Position Four-Port Fully Closed)

Weight: Approximately 3.2 kg

Electrical Interface: 6+PE Aviation Plug Moog Inc.

2) Performance Features

Drive Method: Permanent Magnet Linear Force Motor, Direct Drive Valve Core, No Pilot Stage Moga China

Dynamic Characteristics: Stable Frequency Response, Not Affected by System Pressure, Strong General Compatibility

Leakage: Low Internal Leakage, Low Power Consumption, Low Heat Generation

Anti-Contamination: No Fine Orifice, Strong Anti-Contamination Capacity, High Reliability

Power Failure Safety: Spring Centering When Power Failure, Load Stopped, Safe Failure Moga Inc.

II. Typical Application Scenarios

40L/min Medium Flow + Standard Response (80–120Hz)

T Port Low Pressure Return Oil (≤50bar), No Need for Y Port

Normal Temperature (−20～+80℃), Ordinary Hydraulic Oil

Small-sized Pressing Machines, General Injection Molding Machines, Die-Casting Machines, Small Roll Gap in Metallurgy, Medium Flow, Pursuing Stability and Reliability, Cost Performance Priority Standard Conditions