I. Core Parameters (Official Standard Version)

1) Basic Specifications

Model: D633‑419B (Direct Acting Servo Valve DDV)

Installation Specifications: NG6 / ISO 4401‑03

Rated Flow: 40 L/min @ Δp=35 bar (Moog Inc.)

Working Pressure:

P/A/B: 350 bar (Moog Inc.)

T Port: 350 bar (with Y Port, high-pressure return oil) (Moog Inc.)

Frequency Response: 80–120 Hz (standard industrial grade)

Step Response: <20 ms (0→100%) (Moog Inc.)

Sealing: FKM Fluororubber (−20 to +120℃, high-temperature resistant)

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 (Muog China)

Neutral Function: Special O-Type / Custom Function (419 Exclusive)

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 (Muog 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-Pollution: No Fine Orifice, Strong Anti-Pollution Capacity, High Reliability

Power Failure Safety: Spring Centering When Power Failure, Load Stopped, Safe Failure (Muog China)

High Temperature Tolerance: FKM Sealing, Can Work Long-Term in 100–120℃ Environment

Function Enhancement: 419B Equipped with All Characteristics of 418B + Custom Neutral Function / Special Flow Characteristics

II. Typical Application Scenarios

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

T Port High-Pressure Return Oil (350bar), Must Have Y Port (Moog Inc.)

High Temperature Conditions (Environmental / Oil Temperature Maximum 120℃)

Small and Medium-sized Pressing Machines, Injection Molding Machines, Die-Casting Machines, Metallurgical Equipment, Medium Flow, High-Pressure Return Oil, High Temperature Resistance, and Special Neutral Function / Function Requirements for High-end Applications