F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
251/55, 251/57
F16K 31/50 (2006.01) F16K 1/10 (2006.01) F16K 41/12 (2006.01)
Patent
CA 1036570
IMPROVEMENTS IN HIGH PRESSURE DIAPHRAGM VALVES Abstract of the Disclosure A globe type Y-pattern diaphragm valve for high pressure, high temperature service affording increased diaphragm cycle life, enhanced flow coefficient and features of decreases con- struction cost. Comprising the diaphragm is a resiliently sup- ported multi-layer cartridge formed of superimposed layers having different moduli of elasticity with the upper layers being radi- ally slotted to redistribute encountered stress loads. An auxiliary porting in the discharge passage adjacent the valve head in combination with a downstream tapered and faired belt- way effects a more nearly streamlined flow path to increase the flow coefficient rating of the valve. By means of a multi-purpose packing gland identically threaded both inside and out, the gland is able to also function as a stem bushing enabling a comparatively inexpensive bar stock bonnet construction to be employed.
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