Without Oil Reservoir
Without Adjustable Overload Relief Valve
Without Manual Pressure Release Valve

These pumps, either base or flange mounted style, have only check valves. They have no reservoirs, overload relief, or release valves, and are used on equipment that has its own reservoir and control valves. These pumps provide a low cost efficient means for manually developing or increasing pressure in a hydraulic system. In emergencies they furnish reliable hydraulic power to operate presses, valves, doors, safety locks and other devices.


  • Available in hand or foot operated versions
  • A flange mount version is available
  • Maximum pressure 5000 PSI
  • Often used as a stand-by pump for emergencies

Steel (standard) – design details

  • Piston is ground and hard chrome plated
  • All steel pump bodies

Stainless Steel – design details:

  • Available in 100% stainless steel or with “wetted” parts made of
    brass and stainless steel
  • Piston is ground and hard chrome plated
  • We have Bronze piston designs available for use with water applications
  • Excellent choice for medical, food handling, corrosive environments and
    in wash down applications
MountingFlange Mounted
Oil Reserviorfalse
Manual Pressure Release ValveNo
Body MaterialSteel
Maximum Pressure Rating1250 lb
Piston Diameter1 in
Volume per Stroke1.18 in3
Lever Load per 100 PSI9.2 lb
Inlet Port Size (NPTF)3/8 in
Outlet Port Size (NPTF)3/8 in
Net Weight Inc. Oil24 lb


Limited Warranty

    • All Star pumps are covered by a limited warranty on materials and workmanship for one year from the date of manufacture. Star will repair or replace at its option any pump in which Star finds manufacturing defects. In order to get warranty service a pump must be returned to the Star plant freight prepaid with a written explanation of the problem.

Technical Data

    • Light hydraulic oil is recommended for use with Star pumps. Oils with SUS viscosity of 75 to 150 at 100 degrees Fahrenheit will give satisfactory performance (ISO grade 15, 22, or 32). In an emergency situation when the above oils are not available, use 5 W or 10 W motor oil or automatic transmission fluid.


    All exposed surfaces of standard Star pumps are painted with one coat of industrial quality paint. Pumps painted with special colors with two coat finishes, or with prime coat only, and pumps with special plated or polished parts, are also available.