MOOG D651-401 PQ-Proportional Valve_Ningde Androld Automation Equipment Co.,Ltd.

May 28, 2026

MOOG D651-401 PQ-Proportional Valve

Product Introduction Model: D651-401 Type: PQ-Proportional Control Valve, 2-stage, 4-way, DIN 24340 Form A10, Integrated Electronics Manufacturer: MOOG Series: D651 (D650 family, PQ proportional valves) Description: The D651-401 is a compact 2-stage electro-hydraulic proportional valve with integrated electronics, designed for simultaneous, precise flow and pressure control in industrial hydraulic systems. It replaces combinations of conventional valves, simplifying system design while maintaining high accuracy and dynamic response

Description

Product Introduction

Model: D651-40

Technical Specifications

Part Number: D651-401

Valve Size: DIN 24340 Form A10 (port Ø10.5 mm)

Control Function: 4-way flow + pressure control, spring-centered

Rated Flow (Δp=10 bar): 23 L/min (±10% tolerance)

Max Operating Pressure (P/A/B): 350 barMoog Inc.

Pilot Pressure (standard nozzle-flapper): 15–210 barMoog Inc.

T Port Pressure: 50 bar (internal); 350 bar (with external Y drain)

Response Time (0→100% stroke): ≤35 msMoog Inc.

Hysteresis: <0.25% (flow mode); <0.2% (pressure mode)Moog Inc.

Linearity: <1.5%

Electrical:

Supply: 24 VDC (18–32 VDC)
Signal: ±10 V, 4–20 mA
Connector: 6+PE (EN 175201)
Protection: IP65 (mated)
Fluid: Mineral oil (DIN 51524), viscosity 15–45 mm²/s
Temperature:
Ambient: -20°C to +60°C
Fluid: -20°C to +80°C
Mass: ~6.4 kgMoog Inc.
Seals: NBR (standard); FPM/EPDM optionalMoog Inc.

Interface & Communication Configuration

Electrical Interface: Analog command (±10 V / 4–20 mA) + 24 VDC power

Feedback: Integrated spool position sensor + pressure sensor (closed-loop PQ control)

Mounting: 4-bolt DIN 24340 Form A10 pattern (M6 screws, 11 Nm torque)

Porting: P, A, B, T; optional external Y drain (for T>50 bar)

Core Functions

Dual-Function Control: Combines precise flow and pressure regulation in one valveMoog Inc.
Integrated Closed-Loop Electronics: Onboard PID control for spool position and pressure, high accuracy
High Dynamic Response: 35 ms step response for fast, stable control
Low Hysteresis & High Resolution: <0.25% hysteresis, excellent repeatability
Compact & Simplified System: Replaces multiple conventional valves, reducing plumbing and costMoog Inc.
Robust Pilot Stage: Nozzle-flapper design (jet-pipe optional) for reliable long-term operationMoog Inc.

Application Scenarios

Industrial Machinery: Injection molding, die-casting, metal forming presses
Machine Tools: High-precision hydraulic actuators, clamping systems
Test Stands: Pressure/flow simulation, component durability testing
Hydraulic Power Units: Variable pressure/flow control for multi-actuator systems

Compatibility Note

Series Compatibility: Interchangeable with D651 series variants (D651-402/403)
Replacement: Drop-in upgrade for conventional proportional valves and pressure/flow control combinations
System Requirements: 24 VDC power supply, analog controller, DIN 24340 Form A10 manifold

Contact Info