초록 ▼

A rolling diaphragm regulator valve is affixed in a globe type valve body and includes a nonstretchable fabric reinforced elastomer diaphragm for covering and uncovering, by rolling action in response to changes in pressure in a control chamber, a plurality of apertures in a baffle positioned betwee

A rolling diaphragm regulator valve is affixed in a globe type valve body and includes a nonstretchable fabric reinforced elastomer diaphragm for covering and uncovering, by rolling action in response to changes in pressure in a control chamber, a plurality of apertures in a baffle positioned between the valve body inlet and outlet. An axially movable spring-biased nose piece, mounted behind the diaphragm, provides a surface over which the diaphragm is draped for controlling substantially all movement of the diaphragm. A travel indicator is operable by movement of the nose piece to provide a visual indication of the position of the valve. In one embodiment the baffle is notched adjacent to a peripheral mounting surface of the diaphragm, whereat the ends of the fabric reinforcement are exposed to permit entrained gases to escape. Other embodiments include areas of the diaphragm, exposed to the apertures, that have pinholes in the elastomer surface and that have the fabric surface exposed.

대표청구항 ▼

A rolling diaphragm regulator valve comprising: a valve body defining a inlet and an outlet in axial alignment for mounting in a pipeline; a baffle, interposed in said body between said inlet and said outlet, including a frustroconical portion defining a plurality of apertures; a control chamber sit

A rolling diaphragm regulator valve comprising: a valve body defining a inlet and an outlet in axial alignment for mounting in a pipeline; a baffle, interposed in said body between said inlet and said outlet, including a frustroconical portion defining a plurality of apertures; a control chamber situated at right angles to said inlet and said outlet; a diaphragm arranged for rolling and unrolling along the surface of said frustronconical portion, responsive to pressure in said control chamber, for progressively exposing and covering said apertures to regulate inlet to outlet flow, said diaphragm comprising a sandwich of a woven fabric reinforcement in a nitrile elastomer and being substantially nonstretchable; an axially movable nose piece mounted in said control chamber behind said diaphragm; spring means for urging said movable nose piece toward said diaphragm; indicator means operable by movement of said nose piece for visually displaying an indication of the position of said valve; and means exposing at least portions of said fabric to said flow for enabling release of any entrained gases in said diaphragm.