A Further fireplace-Protected packing is offered within the seat ring for inside leakage avoidance to your body cavity. The seat ring shall have two Key leap seals having a fire-Protected graphite ring. The stem shall have a minimum of two Principal lip seals or U or V-shaped packing with hearth-Harmless https://hotbookmarkings.com/story19480421/examine-this-report-on-pipe-flanges-and-fittings