초록 ▼

A sanitary diaphragm valve is provided that includes a generally dome shaped diaphragm having a central boss that can be connected to or driven by a valve actuator. The diaphragm includes an outer peripheral edge and a relatively thin web portion that connects the boss to the outer edge. In one embo

A sanitary diaphragm valve is provided that includes a generally dome shaped diaphragm having a central boss that can be connected to or driven by a valve actuator. The diaphragm includes an outer peripheral edge and a relatively thin web portion that connects the boss to the outer edge. In one embodiment, the web portion is arcuate or dome shaped. The thinner web portion permits the diaphragm to have an extended cycle life and to permit the valve to operate at higher fluid pressures. The thin web may be defined by two different contoured surfaces, one convex and the other concave, such as formed by two radiuses. A valve body is provided that includes a bowl shaped valve cavity. This valve cavity includes an outer vertical edge to permit more thorough cleaning and to eliminate entrapment areas. The valve assembly provides support surfaces for the diaphragm that reduces stress on the diaphragm particularly at higher operating pressures.

대표청구항 ▼

[ Having thus described the invention, it is claimed:] [26.] A diaphragm valve comprising:a valve body having a longitudinal axis and a cavity therein defining a fluid chamber;a port that opens to said chamber;a diaphragm that seals said chamber, said diaphragm comprising an outer edge region;wherei

[ Having thus described the invention, it is claimed:] [26.] A diaphragm valve comprising:a valve body having a longitudinal axis and a cavity therein defining a fluid chamber;a port that opens to said chamber;a diaphragm that seals said chamber, said diaphragm comprising an outer edge region;wherein said cavity comprises a bowl shaped recess in said valve body facing said diaphragm; said cavity having a curvilinear surface that is joined by a smooth transition surface to a circumferential edge surface that is substantially parallel said longitudinal axis and said diaphragm outer edge region having a portion that is substantially parallel to said longitudinal axis adjacent said circumferential edge surface of said cavity.