Pressure Relief Valve PC6-FP-43T
| Benefits and Featuresn 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 n High performance ❑ Fast, smooth response to pressure fluctuations ❑ High flow capacity ❑ Approved for PN 25bar/365 psi ❑ Straight-through-flow Y-type body n Specifically-designed for fire protection ❑ Face-to-face length standardized to ISO 5752, EN 558-1 ❑ Meets the requirements of the industry standards n Quick and easy maintenance ❑ In-line serviceable ❑ Fast and easy cover removal |
The BERMAD Model PC6-FP-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 PC6-FP-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 [5] controls the valve’s closing speed. For valves 8” and larger, an adjustable needle valve is provided.
System Installation
A typical installation of the BERMAD model PC6-FP-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 PC6-FP-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
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Recommended Relief Valve Sizing for pressure reducing systems
Fire pump relief
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Engineering Specifications
The pressure relief valve shall maintain a constant, preset, maximum upstream pressure regardless of fluctuating demand, it shall be a UL-listed and FM-approved, 25 bar / 365 psi rated, line pressure driven and pilot operated, pressure control valve. The valve shall be of the elastomeric-type with a straight-through Y-type body design. It shall have an unobstructed flow path, with no stem guide or supporting ribs. Valve actuation shall be accomplished by a single-piece, rolling diaphragm bonded with a rugged radial seal disc. The diaphragm assembly shall be the only moving part. Removing the valve cover for inspection and maintenance shall be inline and shall not require removal of the control trim. The control trim shall be supplied pre-assembled and hydraulically tested by a factory certified to ISO 9000 and 9001 standards.
