PM12-25-45byB-s Single-Acting Manual Pump

PM12-25-45byB-s is multi-displacement single-acting plunger manual hydraulic pump fitted with both relief valve and overflow unloading valve, compatible with PM12/PM25/PM45 three displacement specifications. Reciprocate the operating handle to drive internal plunger reciprocating motion, changing pump chamber volume to realize hydraulic oil suction and high-pressure output; dual-valve structure provides dual overpressure protection for hydraulic loop. Flange base design enables stable bolt fixing on various hydraulic power units.Core Advantages✅ 3-in-1 Variable Flow Selection

One pump body matches three displacement options: PM45/PM25 large displacement for rapid oil supply & fast lifting under low pressure; PM12 small displacement for labor-saving high-pressure holding, flexibly balance lifting efficiency and hand operation force.

✅ Dual-Valve Double Overload Protection

Equipped with built-in relief valve and overflow valve, dual safety design to limit peak system pressure; automatically unload excess pressure during overload, effectively protect pump body and matched hydraulic cylinder against overpressure damage, greatly improving system stability.

✅ Ergonomic Optimal Force Matching

Three independent pressure-handle characteristic curves cover 0~600BAR working range; refer to orange optimal intensity baseline to configure matched handle length for each model, keep operating force in comfortable labor-saving range and reduce continuous working fatigue.

✅ Flange Fixed Mount Base

Integrated bottom flange with pre-set mounting holes, directly fixed on equipment base by bolts without extra support brackets, compact layout and neat pipeline arrangement for customized assembly.Application FieldsMatched with single-acting hydraulic cylinders, widely used for automobile repair lifting equipment, industrial maintenance hydraulic tools, portable engineering hydraulic machinery and customized hydraulic stations requiring dual overpressure safeguard & variable flow output.