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Model 127-4 Pressure Reducing and Check Valve

Model 127-4 Pressure Reducing and Check Valve

The Model 127-4 has a wide range of applications for anywhere a pressure must be reduced to a manageable level and reverse flow must be prevented. Typical examples include high rise and commercial buildings, pump systems, zone pressure control in municipal and industrial water, and irrigation systems.


  • Reduces a higher inlet pressure to a lower outlet pressure
  • Constant outlet pressure over wide flow range
  • Check feature closes valve on pressure reversal
  • Pilot-operated main valve not subject to pressure fall off
  • Outlet pressure is adjustable with single screw
  • Can be maintained without removal from the line
  • Adjustable opening/response speed
  • Factory tested and can be pre-set to requirements
Model SheetModel Sheet (metric)SpecificationsAnimationOperations Manual
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