PM50S Single-Acting Manual Pump With Relief Valve

PM50s is high-displacement single-acting plunger manual hydraulic pump fitted with built-in adjustable relief valve. Reciprocate the handle to drive internal plunger, varying pump chamber volume to complete oil suction and high-pressure fluid output, converting manual mechanical energy into hydraulic power. The integrated relief valve delivers automatic overpressure unloading protection for whole hydraulic system.Core Advantages✅ Large Displacement & High Working Efficiency

Big bore plunger design brings larger single-stroke oil delivery volume, fewer handle swings to build target pressure, ideal for heavy-load rapid lifting operations.

✅ Built-in Overload Pressure Protection

Equipped with side-mounted relief valve; when system pressure exceeds preset value, the valve automatically overflows to limit peak pressure, effectively preventing pump and matched hydraulic cylinder from damage caused by overpressure.

✅ Ergonomic Force Matching Option

According to Pressure-Handle Force Diagram (0~600BAR working range), customers select matching handle length against the orange maximum force benchmark to keep operating force within comfortable range and reduce fatigue.

✅ Multi-point Mounting Lugs

Pump body with multiple fixed lugs for flexible installation on heavy-duty hydraulic power packs and lifting equipment, convenient pipeline arrangement.Application FieldsMatched with large-bore single-acting hydraulic cylinders, widely used in heavy truck maintenance, industrial lifting, construction machinery repair and high-flow portable hydraulic units requiring overpressure safeguard.