Quick connect, post energized flanged joint for a diaphragm valve

摘要

A diaphragm valve has a valve body with a passage to be opened to allow fluid to pass through the valve body and to be closed to prevent fluid from passing through the valve body, and has a bonnet assembly with a pressure ring to load and unload a diaphragm based on a first spring constant to seal a peripheral portion of the diaphragm, and a compressor to close or open the passage of the valve body. The valve body and bonnet assembly have a connection that allows the valve body and bonnet assembly to be substantially fixed together with a second spring constant that is substantially higher than and independent from the first spring constant.

主权项

1. Apparatus, including a diaphragm valve, comprising:
a valve body configured with a passage to be opened to allow fluid to pass through the valve body and to be closed to prevent fluid from passing through the valve body; a bonnet assembly having a compressor, a pressure ring, and a diaphragm, the pressure ring configured to load and unload the diaphragm based at least partly on a first spring constant to seal a peripheral portion of the diaphragm, and the compressor configured to close or open the passage of the valve body; and the valve body and bonnet assembly being configured with a connection that allows the valve body and bonnet assembly to be substantially fixed together with a second spring constant that is substantially higher than and independent from the first spring constant, wherein the connection is a rotational connection that includes: the valve body having a rim or surface configured with at least two shouldered pins arranged on opposite sides of the valve body; and the bonnet assembly having a corresponding rim or surface configured with at least two keyways arranged on opposite sides of the bonnet assembly, each keyway being recessed and configured to receive and engage a respective shouldered pin when the bonnet assembly is rotated in relation to the valve body.