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Pumps with 4 way valves are for use with double-acting cylinders.  This valve allows the pump to advance or retract a double-acting cylinder at full pump pressure.
A 4-way valve can be placed on any of the P, PH and CP series pumps.  To order a pump with a 4-way valve, simply add "-4V" after the pump model number (Example P2A-160-4V)
  • Same features as each Model without this 4-way valve

Typical Applications:
  • Industrial transfer of liquid
  • Operated presses, valves, doors, safety locks and various other devices

Design Details:
  • pumps with these valves do not have release valves because the 4-way valve is used to release pressure
  • 4-way valves only used on pumps to 10,000 PSI
Unit of Measure



N/A Two Speed, Base Mounted



Oil Reservoir

N/A Yes

Adjustable Overload Relief Valve

N/A Yes
Maximum Pressure Rating1 N/A 10000 psi

Piston Diameter

N/A 1 1/2-1/2 in

Volume per Stroke

N/A 2.65 in³

Load per 100 PSI

N/A 12.0 lb

Outlet Port Size (NPTF)

N/A 3/8

Reservoir Volume

N/A 250 in³

Net Weight Inc. Oil

N/A 44 lb

Operating Lever Size

N/A 24 in

Technical Information


    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.

  • 1 Adjustable overload will be set at maximum unless a lower pressure is specified by customer. Add specified pressure in PS at end of Model No. Example: P1A-LR-8000.