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General Pump PULSAR4HP Trapped Pressure Unloader Valve - 10.5 GPM, 4500 PSI, 3/8 Ports

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1.64 lbs
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Brass pressure unloader with a maximum pressure of 4500 PSI and a maximum flow rate of 10.5 GPM. Inlet, outlet, and bypass ports are all 3/8" NPTF. Reliably maintains consistent pressure without too much maintenance. Blue spring.

Technical Specifications

Max PSI: 4500
Max GPM: 10.5
Inlet Port: 3/8 inch
Outlet Port: 3/8 inch
Max Temperature: 195 degrees F

Product Description

4500 PSI Blue Spring Unloader

The General Pump PULSAR4HP Unloader is a pressure release valve that maintains consistent pressure levels, protects pumps, and allows for easier spray gun operation. This quality unloader is made with brass and has a blue spring. Extremely reliable with easy maintenance. General Pump recommends using a safety relief valve device in conjunction with this unloader when installed on a positive displacement pump.

Dimensions: 3.31" width x 2.19" height x 7" depth


  • 4500 PSI maximum pressure - rated for 4050 PSI
  • 10.5 GPM max volume
  • 3/8" (x2) inlet port
  • 3/8" outlet port
  • 3/8" (x2) bypass port
  • 195° Fahrenheit maximum fluid temperature - 140° Fahrenheit continuous use
  • Brass construction
  • Blue spring
  • Weight: 1.6375 lbs.

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