| 摘要 |
The present invention is a diaphragm seal for an instrument having a first coupling member with a cavity in communication with the instrument, a pressure-responsive diaphragm attached within the cavity of the first coupling member, an adapter ring fitted to the first coupling member, and a second coupling member connected to the first coupling member. The adapter ring is a rigid cylindrical member having an internal shoulder extending inwardly of the cylindrical member at the end opposite the diaphragm. The adapter ring has a sleeve fitted within the cylindrical member so as to overlie the internal shoulder. The second coupling member has an internal area communicating with the interior of the adapter ring. The adapter ring is interposed between the first and second coupling members. The second coupling member has a lining surrounding the internal area. This lining is in sealed relationship with the sleeve of the adapter ring. The lining and the sleeve are composed of a synthetic resin polymeric material.
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