Diaphragm stem seal attachment

Details Diaphragm stem seal attachment Diaphragm stem seal attachment

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 41/14 (2006.01) F16J 15/52 (2006.01) F16K 41/10 (2006.01)

Patent

CA 2048410

21-56(10715)A "DIAPHRAGM STEM SEAL ATTACHMENT" Abstract Of The Disclosure A sliding stem valve for controlling fluid flow in a valve body having a seat, a bonnet, a valve stem and plug slidably mounted in the bonnet for engaging the seat during valve shut-off, and a diaphragm forming a stem seal for preventing the undesired leakage of fluid into the atmosphere. The diaphragm is formed of elastomeric material with bead edges at opposite ends. The top diaphragm bead edge is sealed with a retainer to the bonnet. The bottom diaphragm bead seal is sealed to the valve stem while enabling the valve stem to rotate with respect to the bottom diaphragm bead edge. A sized retainer, bushing and retainer ring mount the bottom diaphragm bead edge to the valve stem and permit slidable motion of the bead edge with the valve stem while enabling the valve stem to rotate with respect to the bead edge and still maintain a viable diaphragm seal.

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