Creep resistant valve

Details Creep resistant valve Creep resistant valve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 25/00 (2006.01) F16K 7/12 (2006.01) F16K 11/00 (2006.01) F16K 11/048 (2006.01) F16K 31/524 (2006.01)

Patent

CA 2292279

A valve made principally of plastic has a creep compensating features providing consistent engagement between valve members and their respective valve seats, minimizing creep, and compensating for any creep that does occur. The features compensate for compression of internal valve components as well as extension of the valve body. In a manually operated three way valve embodiment of the invention, a trapped spring mechanism inserted between an actuator portion and the upper valve member provides the closure force for the upper valve member on the upper valve seat. A conventional lower spring provides the closing force for the lower valve member. Valves according to the invention are particularly suitable for quarter-turn three- way manual diaphragm valves and for applications in the semiconductor industry.

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