Model PRV Pressure Regulating Valve

The Model PRV Pressure Regulating Valve is an FM Approved diaphragm-type valve used to reduce and regulate pressure in both flowing and non-flowing conditions.

Performance Under Pressure

Photo of the valve
FM Approved for 400 psi (27.6 bar) service.
Photo of the valve
Simple design. Field Adjustable Pressure.
Photo of valve and sprinkler heads
One Source.
Photo of some parts


  • FM Approved
  • Compact trim
  • Pressure relief valve included
  • Install vertically or horizontally
  • No trim connections to the valve cover
  • Multiple end connections available
  • Internally and externally coated with red oxide epoxy with a urethane coating to protect against UV damage
  • Field-adjustable output pressure range of 50–200 psi (3.4–13.7 bar) for supply pressure up to 300 psi (20.7 bar); and 100-200 psi (6.7 to 13.8 bar) for supply pressure of 300-400 psi (20.7-27.6 bar)


  • 2½” (65mm), 76mm, 3” (80mm), 4” (100mm), 6” (150mm), and 165mm nominal sizes with multiple end configurations

Pressure Relief Valve

  • 185 psi (12.8 bar), 260 psi (17.9 bar)



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