The PRD Valve is installed to prevent excessive system pressure or vacuum that could result from line restrictions. Valves should be installed at the blower outlet (downstream) in pressure systems and at blower inlet (upstream) in vacuum systems. These valves are suitable for air, natural gas, propane, and other non-corrosive service.
Note; PRD Valves are not factory preset, but are easily field adjustable.
Blue-White Industries - FlowMeter, 0-5 GPM, 1/2" THD Inline - F-40500LN-8 F-40750LN-12 standard model for liquid Features: Durable, highly polished, one piece meter body.