• 50B-4KG-1

50B-4KG1 & 2050B-4KG1
Pressure Relief Valve - UL, FM, ULC, ABS


The Cla-Val Pacific Model 50B-4KG1 Globe / 2050B-4KG1 Angle Pressure Relief Valve is designed specifically to automatically relieve excess pressure in fire protection pumping systems.  Pilot controlled, it maintains constant system pressure at the pump discharge within very close limits as demands change.

Advantages include:
  • UL Listed / ULC Listed/FM Approved/ ABS Design Assessed
  • Fast Opening to Maintain Steady Line Pressure
  • Accommodates Wide Range of Flow Rates
  • Closes Gradually for Surge-Free Operation
  • Adjustable Pressure Settings, Not Affected by Pressure At Valve Discharge
How it works:
At pump start, Cla-Val Pacific Relief Valve modulates to relieve excess pump capacity, maintaining positive system pressure at the pump discharge.
When fire demand slows or ceases, Cla-Val Pacific Model  50B-4KG1 opens, diverting entire pump output to discharge, allowing fire pump to be stopped without causing surging in the lines.