The pressure reducing valve (PRV) is designed to reduce both residual (flowing) and static (non-flowing) water pressure. In contrast, pressure restricting devices (PRDs) are designed to only control residual (flowing) water pressure. This differentiation is vital to understanding the design application and expectations of the system.

This is where pressure reducing valves come in. You can have several installed on the lower floors of your high-rise building to keep the water pressure below 175 psi while still maintaining at least 100 psi for standpipes and sprinkler heads on the upper floors. Other Ways of Dealing with Fire Pump Water Pressure Fluctuations

PRESSURE REDUCING VALVE: Threaded Flanged Grooved: Inlet Pressure: 175psi - Outlet Adjustment Pressure: 30-165psi Inlet Pressure: 300psi - Outlet Adjustment Pressure: 30-165psi: 82°C: 1 ½" - 3" Threaded 1 1/2" - 10" Flanged 1 1/2" - 8" Grooved: For all fire fighying systems which require pressure pressure adjustment.

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The Zurn Wilkins Model ZW209FP Pilot Operated Pressure Reducing Valve is designed specifically for Fire Suppression Systems to reduce high inlet pressures to a safe and stable outlet pressure. The pilot assembly reacts to changes in downstream pressure allowing the main valve to modulate between the closed and open position ensuring

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Pressure Restricting Hose Valves Pressure restricting hose valves are used to restrict the pressure of flowing water up to 175 PSI. They are angle hose valves with preset orifices which restrict the volume of water and thereby lower the pressure of the flowing water. NFPA requires restricting valves where the inlet pressure exceeds 100 PSI.

NFPA requires pressure reducing valves where the inlet pressure exceeds 175 PSI. The field adjustability of these valves gives the installer/engineer the option to set the desired PSI rating themselves versus having the manufacturer do it. Specifications: Field adjustable or set at the factory U/L Listed 400 PSI max operating pressure

Pressure reducing valves (PRV) are frequently used in high rise buildings to keep the pressure on sprinkler systems below the allowable maximum, typically 175 psi, when the supply to the systems can be considerably higher.

5/17 · Pressure Reducing Valve are commonly used to prevent excess pressure upon systems when supplies exceed the NFPA limit of 175 psi. There has been much discussion

Pressure-Tru® 2-1/2" Pressure Reducing Fire Sprinkler Control Valve. Specs and Installation. Where to buy. ZW4000G.