ASCO 8214250VICSA Valve 322056 301 the FV 4M1 1 is equipped with the FV 4M1 1 is equipped with a high temperature resistant polyethylene float and a silicone rubber seal to ensure tight shut off even during localized temperature spikes This heavy duty assembly is built to withstand the rigorous demands of drip leg applications and process heat and is the designated replacement part for maintaining the 20 to 50 PSI maximum operating pressure (MOP) ratings depending on the specific trap body configuration The integrated visual indicator provides immediate on site status of the valve position leak tight shutoff to prevent hazardous gas leaks