Patent ID: 7614606

Claim:
A diaphragm valve, comprising: a valve body having a stem; a diaphragm movable in relation to the stem, said diaphragm being made of polymer material and having a fluid-distal surface; a compressor for moving the diaphragm between an open position in which the diaphragm is detached from the stem and a closed position in which the diaphragm is pressed against the stem, said compressor including a base body defining a center axis and having a diaphragm-proximal surface, said base body being configured on the diaphragm-proximal surface to define first and second grooves on opposite sides of the center axis; and inserts received in the first and second grooves in one-to-one correspondence and forming a material layer in confronting relationship to the fluid-distal surface, said inserts being made of polytetrafluoroethylene.