Valve Fire Safe Design and Validation

Fire safe is the standard design of all China valve supplier ball valve. China valve supplier soft seat ball valve fire safe tests were witnessed and certified by Lloyd's Register. Our in-house computerized fire test facility is capable of testing and certifying of China valve supplier floating and trunnion mounted ball valves per API 6FA and API 607.
Fire Safe Seat sealing for floating Ball Valve
When non-metal sealing material have decomposed or deteriorated by a plant fire, the upstream line pressure pushes the ball against the metal seat lip, beneath soft seat, to shut off the line fluid and minimize internal leakage.
Fire Safe Seat Sealing for trunnion mounted Ball Valve and Gate Valve
External leakage prevention
Leakage from the valve stem area is prevented by double o-ring sealing、packing and firesafe gasket. Leakage through the valve body joint is also blocked by double o-ring sealing and body gasket. After a fire has deteriorated o-rings, gland gasket, body gasket and stem, fire safe packing is the feature that prevents external fluid leakage.
Internal leakage prevention
When non-metal materials, such as o-ring, seat insert and spacer have decomposed or deteriorated by fire,the edge of the metal seat, preloaded by the seat spring, comes into contact with the ball to shut off the line fluid and minimize internal leakage through the valve bore. Also the fire safe flexible graphite seat packing will be compressed by the seat spring to prevent fluid leakage between the valve body and the seat.

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