... life of springs and diaphragms used for the BOV lasts for 200, 000 times of operation (open ... under 200C (or 392F). Materials used for making BOV are high quality aluminum alloy.*All our BOVs have ... bov is good for release air pressures in turbocharged engines to prevent compressor surge and reduce wear on the engine. Car Blow Valve ... , SSQV, SQV,BLOW OFF VALVE