Sanitary diaphragm valve
AssigneeSwagelok Company
InventorsRonnie Browne, George Carlson
Life of this patent
Estimating the term…
Abstract
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 diaphragm may be made from a chemically resistant material and optimized to maintain high flexure.
Claims14
A radial diaphragm valve comprising:
- a valve body having a valve cavity therein;
- a diaphragm having a perimeter that seals said valve cavity, wherein said diaphragm includes a web portion, a rim portion and a central stem portion, said central stem portion including a surface for sealing against a fluid passageway in said valve cavity;
- wherein said web portion is connected to said central stem portion and extends outward away from said central stem portion radially, said web portion being arcuate in shape extending a predetermined height above a planar surface defined by a top surface of said rim portion;
- wherein less force is required to stretch said diaphragm downward toward the valve cavity than upward away from the valve cavity.
A valve diaphragm having a perimeter that seals a valve cavity, wherein said diaphragm includes a web portion, a rim portion and a central stem portion, said central stem portion including a surface for sealing against a fluid passageway in said valve cavity;
- wherein said web portion is connected to said central stem portion and extends outward away from said central stem portion radially, said web portion being arcuate in shape extending a predetermined height above a planar surface defined by a top surface of said rim portion.
A radial diaphragm valve comprising:
- a valve body having a valve cavity therein;
- a diaphragm having a perimeter that seals said valve cavity, wherein said diaphragm includes a web portion, a rim portion and a central stem portion, said central stem portion including a surface for sealing against a fluid passageway in said valve cavity;
- wherein said web portion is connected to said central stem portion and extends outward away from said central stem portion radially, said web portion being arcuate in shape;
- wherein the ratio of the diaphragm downward stroke to the diaphragm upward stroke is in the range of about 1.25 to about 1.50.
Dependencies are inferred from the claim text.