| 摘要 |
An orifice plate assembly for use with a dual chamber orifice fitting, comprising an orifice plate carrier, the orifice plate carrier being formed with a through hole therethrough and having a collar portion formed integrally with the orifice plate carrier, the collar portion encircling the through hole, the collar portion having an interior circumferential portion; an orifice plate seal adapted to be received by the collar portion, formed of a resilient material, the orifice plate seal having at least a planar portion dimensioned to abut the orifice plate carrier inside the collar portion, a bead extending within the through hole formed through the orifice carrier plate, and an outer circumferential wall, at least a part of the outer circumferential wall being situated at an obtuse angle to the plane of the orifice plate carrier, the interior circumferential portion of the collar portion having an angle which is substantially the complement of the obtuse angle, the outer circumferential wall being dimensioned to maintain contact with the inner circumferential wall of the collar portion so that the interior circumferential portion catches the outer circumferential portion; and an orifice plate mounted in and retained by the orifice plate seal within the through hole formed in the orifice plate carrier.
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