Bermad FP43T Pressure Relief Valve



Bermad FP43T Pressure Relief Valve

The BERMAD model 43T is an elastomeric, pilot operated, pressure-relief valve. Designed specifically for advanced fire protection systems and the latest industry standards. The 43T prevents damage from over-pressure in piping systems, maintaining a preset upstream pressure limit regardless of pressure peaks and fluctuating conditions. Due to exceptional reliability and low head loss, it is ideal for relief of fire pump discharge. The 43T dependably relieves excess system pressure to sump or atmosphere, meeting all NFPA, UL, and FM requirements for fire pump service. The 43T is also well-suited for maintaining foam concentrate discharge pressure for a balanced proportioning system. As an option the 43T can be fitted with a valve position indicator that can include a limit switch suitable for Fire & Gas monitoring systems.


  • Fire pump pressure relief
  • Foam concentrate recirculation
  • Centralized thermal pressure relief
  • Zonal safety relieF


  • Safety and reliability
    • Time-proven, simple, fail-safe actuation
    • Single piece, rugged, elastomeric diaphragm seal –
  • VRSD technology
    • Obstacle-free, uninterrupted flow path
    • High discharge capacity
    • No mechanical moving parts
  • High performance
    • Fast, smooth response to pressure fluctuations
    • High flow capacity
    • Approved for PN 25bar/365 psi
    • Straight-through-flow Y-type body
  • Specifically-designed for fire protection
    • Face-to-face length standardized to ISO 5752, EN 558-1
    • Meets the requirements of the industry standards
  • Quick and easy maintenance
    • In-line serviceable
    • Fast and easy cover remova



The BERMAD Model 43T pressure control valve remains closed as long as system pressure remains lower than the preset value. The preset pressure can be adjusted by way of the pilot adjusting screw When the pilot valve senses upstream pressure higher than the preset value it opens releasing water pressure from the main valve control chamber thus causing the 43T to open and thereby relieving excess system pressure to a reservoir or sump, preventing system overpressure.

When inlet pressure falls, the pilot valve throttles, enabling pressure to accumulate in the control chamber. This causes the main valve to close further and sustain upstream pressure. An integral restrictor controls the valve’s closing speed. For valves 8” and larger, an adjustable needle valve is provided.


Bermad FP43T Pressure Relief Valve Bermad FP43T Pressure Relief Valve Brochure