| CPC F16K 7/16 (2013.01) | 16 Claims |
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1. A valve comprising:
a controller comprising a diaphragm; and
a body comprising:
an opening covered by the controller;
a chamber containing the diaphragm moving inside;
a channel comprising a first section, a second section, a third section and a fourth section wherein an end of the second section connects to an inlet of the chamber, an outlet of the chamber connects to an end of the third section, a flow in the second section diverts to the chamber from a central line of the first section, and the flow in the third section returns from the chamber to a central line of the fourth section;
an annular bulge protruding from an inner wall of the end of the second section wherein the annular bulge has a shape to be blocked by the diaphragm when the diaphragm is moved to contact the end of the second section; and
a conical protrusion on the diaphragm, a flat area around the conical protrusion, and an annular groove on the flat area wherein the annular groove fits the annular bulge.
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