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Model 43T

Model 43T
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BERMAD Fire Protection 400Y Series Pressure Relief Valve Model 43T 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. 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 UL-Listed 9001-2000 Fire Pump ISO Groupe Relief Valves ISO 9001-2000 Sizes 1½” -10” 9001-2000 ISO performance ❑ Fast, smooth response to pressure fluctuations ❑ High flow capacity ❑ Approved for PN 25bar/365 psi ❑ Straight-through-flow Y-type body FM Approved Water Pressure Relief Valves Sizes 1½” -10” APPROVED APPROVED APPROVED for fire protection Face-to-face length standardized to ISO 5752, EN 558-1 ❑ Meets the requirements of the industry standards ❑ and easy maintenance In-line serviceable ❑ Fast and easy cover removal Det Norske Veritas Type Approval (in process) (in process) ABS (in process) American Bureau of Shipping Type Approval Lloyd’s Register Type Approval Typical Applications Additional Features water compatibility control filter nnPosition limit switches pump pressure relief concentrate recirculation nnCentralized thermal pre

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BERMAD Fire Protection Operation (for Illustration Only) Valve Open (pressure-relief) Valve Closed Valve Open (pressure-relief) 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 [4] When the pilot valve [1] senses upstream pressure [2] higher than the preset value it opens releasing water pressure from the main valve control chamber [3] thus causing the 43T to open and thereby relieving excess system pressure to a reservoir or sump, preventing...

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400Y Series Pressure reducing valve BERMAD 43T Pressure relief valve System Installation A typical installation of the BERMAD model 43T features a pilot valve for the automatic and accurate maintenance of a constant preset maximum upstream pressure, regardless of fluctuating demand. The fast opening 43T reliably relieves excess system pressure to sump or atmosphere, meeting NFPA, UL, and FM requirements for fire pump service. A unique actuator design ensures quick and smooth valve action. Pressure reduction systems ■ The fast response of the 43T preempts pressure reducing valve reaction...

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Technical Data Available Sizes (inch) ■ Flanged - 1h, 2, 3, 4, 6, 8, 10, 12, 14 & 16” ■ Grooved - 1h, 2, 3, 4, 6 & 8” ■ Threaded - 1h & 2” Pressure Rating ■ ANSI#150 - 16 bar / 235 psi ■ ANSI#300 - 1h” to 10” 25 bar / 365 psi 12” to 16” 20 bar / 300 psi ■ Grooved/Threaded - Refer to code designations table below ■ Pressure Settings: Class #150 / PN16: 4 - 16 bar (60 - 235 psi) Class #300 / PN25: 7 - 25 bar (100 - 365 psi) Maximum Differential for pump-relief valve or PSV: 25 bar/350 psi Maximum Differential for PCV duty: 12 bar/175 psi Pump relief sizing shall be in accordance with the NFPA...

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