MPCV Stack‑type Pilot Operated Check Valve

3 month ago

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4 year

Product details

MPCV Stack‑type Pilot Operated Check Valve

Product Overview

MPCV stack‑mounted pilot operated check valve, also known as modular hydraulic lock, is sandwich‑plate directional control hydraulic valve conforming to ISO4401 installation standard. It is stacked between solenoid directional valve and manifold block without extra manifold plate. Poppet‑type sealing realizes near‑zero static leakage, holding load position and preventing cylinder drifting or piston sinking. Available in A‑port, B‑port and W‑type(A&B dual‑port hydraulic lock) versions, widely used for load‑holding circuit in various industrial hydraulic system.

Main Technical Parameters

Item Specification

Model Series MPCV‑02(NG6), MPCV‑03(NG10), MPCV‑04(NG16)

Max Working Pressure 250 bar (25 MPa)

Max Flow Rate 40‑190 L/min (depends on nominal size)

Cracking Pressure Options 0.05 MPa, 0.35 MPa

Function Types A‑port lock / B‑port lock / W‑type dual‑port(A&B) lock

Mounting Standard ISO4401 stack‑sandwich installation

Sealing Structure Hardened poppet metal‑to‑metal sealing, near‑zero static leakage

Hydraulic Medium Anti‑wear hydraulic oil ISO‑VG32 / VG46

Operating Temperature ‑10℃ ~ +70℃

Filtration Requirement ≤25 μm

Working Principle

1. Free forward flow: When hydraulic oil flows in forward direction, oil pressure overcomes spring force to open poppet spool, fluid passes through with low pressure drop.

2. Reverse leak‑free locking: Under reverse load pressure, spring force and back‑pressure press poppet tightly against valve seat. Oil circuit is sealed to hold load position for long‑time, no drifting occurs.

3. Pilot unlocking: Supply pilot control pressure, pilot piston pushes poppet open to realize reverse oil flow and release locked load. W‑type dual‑port version can lock A‑port and B‑port circuit independently for double‑acting cylinder anti‑slippage protection.

Core Advantages

1. Stack‑type modular sandwich structure, no extra piping, compact layout for hydraulic manifold assembly.

2. Precision hardened poppet‑seat pair, excellent zero‑leakage pressure‑holding performance, avoids cylinder piston sinking under static load.

3. Multiple function options: single‑side lock and W‑type bidirectional hydraulic lock to satisfy different circuit requirements.

4. Built‑in pre‑opening damping structure, reduces hydraulic shock and noise during load unlocking.

5. High‑strength cast iron valve body, durable for 24‑hour continuous industrial working conditions.

6. Interchangeable with widely‑used Taiwan‑series MPCV modular pilot check valves, easy spare‑part replacement .

Typical Application

Load‑holding and anti‑drifting circuit for lifting machinery, machine tools, injection‑molding machines, hydraulic presses, metallurgical equipment and automation production‑lines. Especially suitable for double‑acting hydraulic cylinder to prevent gravity‑caused piston descent.

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