Technical Specifications

Part Number: D651-E491

Valve Specification: ISO 4401-A10 (CETOP 5), Diameter Ø10.5 mm

Control Function: Four-way flow + pressure control, spring alignment

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

Maximum Working Pressure (P/A/B): 350 bar

Pilot Pressure: 15–210 bar (internal P or external X for oil supply)

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

Response Time (0→100% Stroke): ≤35 ms

Hysteresis: Flow < 0.25%; Pressure < 0.2%

Linearity: < 1.5%

Electrical:

Power Supply: 24 VDC (18–32 VDC)

Signal: ±10 V, 4–20 mA

Connection: 6+PE (EN 175201)

Protection Grade: IP65 (lock of connection)

Hydraulic Oil: Mineral Oil (DIN 51524), Viscosity 15–45 mm²/s

Temperature:

Environment: -20°C ~ +60°C

Oil: -20°C ~ +80°C

Weight: Approximately 6.4 kg

Sealing: Standard NBR; Optional FPM/EPDM

Interface and Communication Configuration

Electrical Interface: Analog Command (+/-10 V / 4–20 mA) + 24 VDC Power Supply

Feedback: Integrated Valve Core Position Sensor + Pressure Sensor (Closed-loop PQ Control)

Installation: 4-port ISO 4401-A10 Installation (M6 Screws, 11 Nm)

Oil Ports: P, A, B, T; Optional External Y Drain (T > 50 bar) Core function

PQ Composite Control: One valve for precise regulation of flow and pressure

Integrated Closed-loop Electronics: On-board PID for valve core position and pressure loop control, high accuracy

High Dynamic Response: 35 ms step response, rapid and stable control

Low Hysteresis and High Resolution: <0.25% hysteresis, good repeatability

Compact System Simplification: Replacing multi-valve combinations, reducing piping and costs

Sturdy Pilot Stage: Dual nozzles - baffle design (optional jet pipe), long-term reliability Application scenario

Industrial machinery: Injection molding, die casting, metal forming presses

Machine tools: High-precision hydraulic actuators, clamping systems

Test benches: Pressure/flow simulation, component durability testing

Hydraulic stations: Pressure/flow control for multi-actuator systems

Compatibility description

Series compatibility: Can be interchanged with the D651 series (D651‑402/403, D656‑E491)

Replacement: Can directly upgrade traditional proportional valves and P+Q control valve groups

System requirements: 24 VDC power supply, analog controller, ISO 4401‑A10 valve blocks