High pressure diaphragm valve

Details High pressure diaphragm valve High pressure diaphragm valve

F - Mech Eng,Light,Heat,Weapons

16

K

251/67

F16K 7/16 (2006.01)

Patent

CA 1045105

HIGH PRESSURE DIAPHRAGM VALVE Abstract of the Disclosure A closure-port type valve is constructed so as to minimize internal stresses and lengthen valve life. A limit plate is secured between a valve bonnet and a valve body; the limit plate halts motion of a diaphragm compressor as the compressor moves the diaphragm toward a valve-closed position. The limit plate and compressor are provided with surfaces which substantiallly completely support the diaphragm when the valve is fully opened. The limit plate and valve body seal and retain an outer diaphragm edge while achieving matal-to-metal contact, thereby preventing leakage and rocking movement which might otherwise be caused by repeated valve operation, or externally applied forces, such as overhung loads from actuators or seismic shocks.

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