Diaphragm for a valve
AssigneeJames Walker & Co. Ltd.
InventorsPeter John Warren, Stephen Winterbottom
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Abstract
A diaphragm (20) for a diaphragm valve is described. The diaphragm (20) has a body (22) comprising a first elastomer and a resistant layer (24) comprising a second elastomer having a different composition or formulation. Diaphragms described in examples have good flexibility with a high level of chemical resistance and low surface adhesion. A fixing attachment for fixing the diaphragm in the valve is also described.
Claims13
A diaphragm for a diaphragm valve, the diaphragm including a body comprising a first elastomeric material which is an ethylene-propylene elastomer, and further including a layer on a surface of the body, the layer comprising a second elastomeric material which is an ethylene-propylene elastomer, wherein the physical and/or chemical properties of the first and second elastomeric materials are different from each other, and wherein the body and the layer meet the requirements of United States Pharmacopeia <88> Class VI.
Dependencies are inferred from the claim text.