Patent ID: 8602387

Claim:
A valve for a flowable material, said valve comprising: a body having a bore formed therein, the bore having a flow opening on a side of the bore; an actuatable member (i) having an end portion protruding outwardly from the bore and (ii) movable along the bore to open or close the flow opening in an open position or in a closed position, respectively; and a diaphragm seal engageable with the actuatable member, said diaphragm seal including a first portion covering the end portion of the actuatable member and a second portion circumferentially extending around the first portion, wherein the second portion of the diaphragm seal is directly abutted against an end of the body in the closed position to stop the flow of the material within the valve, the first portion of the diaphragm seal is directly abutted against the end portion of the actuatable member and the end of the body in the open position so as to stop the material from being transferred through the diaphragm seal, the diaphragm seal is deformable, and the diaphragm seal is folded to define two folds between the body and the actuatable member when the actuatable member is in the open position.