DIAPHRAGM CONTROLLED BYPASS VALVE
First Claim
1. A diaphragm controlled bypass valve comprising:
- a first valve housing having an inlet, an outlet and a flow pathway defined between said inlet and said outlet;
a needle valve pin disposed at least partially within said flow pathway;
a valve seat disposed within said first valve housing configured to receive a portion of said needle valve pin to close said flow path;
a second valve housing connected to said first valve housing;
a diaphragm extending radially within said second valve housing, said diaphragm and said second valve housing defining a first pressure chamber there between;
a second pressure chamber defined between said diaphragm and said first valve housing;
a sensing line connected to a bore in said second pressure chamber, said sensing line configured to provide a pressure change to said second pressure chamber to displace said diaphragm within said first pressure chamber; and
a shaft assembly disposed between said diaphragm and said needle pin such that displacement of said diaphragm within said second pressure chamber moves said shaft to open and close said needle valve.
4 Assignments
0 Petitions
Accused Products
Abstract
A diaphragm controlled bypass valve includes a diaphragm valve portion and a needle valve portion. The diaphragm valve portion regulates pressurized gas supplied from a pump to determine whether or not to open or close a needle valve. The needle valve portion includes an inlet port, an outlet port and a flow pathway defined between the inlet and outlet ports. A needle pin is disposed within the flow pathway and is coupled to a diaphragm positioned within the diaphragm valve portion. When the diaphragm is displaced in response to changes in pressure, the needle valve pin is likewise displaced which opens and closes the flow pathway.
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Citations
20 Claims
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1. A diaphragm controlled bypass valve comprising:
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a first valve housing having an inlet, an outlet and a flow pathway defined between said inlet and said outlet; a needle valve pin disposed at least partially within said flow pathway; a valve seat disposed within said first valve housing configured to receive a portion of said needle valve pin to close said flow path; a second valve housing connected to said first valve housing; a diaphragm extending radially within said second valve housing, said diaphragm and said second valve housing defining a first pressure chamber there between; a second pressure chamber defined between said diaphragm and said first valve housing; a sensing line connected to a bore in said second pressure chamber, said sensing line configured to provide a pressure change to said second pressure chamber to displace said diaphragm within said first pressure chamber; and a shaft assembly disposed between said diaphragm and said needle pin such that displacement of said diaphragm within said second pressure chamber moves said shaft to open and close said needle valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A bypass valve comprising:
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a first valve housing having an inlet, an outlet and a flow pathway defined between said inlet and said outlet; a valve closure mechanism disposed at least partially within said flow pathway, said closure mechanism configured to be in a first position to allow process media to flow from said inlet to said outlet via said flow pathway and in a second position to prevent process media to flow from said inlet to said outlet; a second valve housing connected to said first valve housing; a diaphragm extending radially within said second valve housing, said diaphragm and said second valve housing defining a first pressure chamber there between; a second pressure chamber defined between said diaphragm and said first valve housing; and a sensing line connected to said second pressure chamber, said sensing line configured to provide a pressure change to said second pressure chamber to displace said diaphragm within said first pressure chamber wherein displacement of said diaphragm controls said valve closure mechanism to move from said first position to said second position. - View Dependent Claims (15, 16, 18, 19, 20)
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17. The bypass valve of claim further 14 comprising a bias spring disposed within said second housing, said spring exerting a force against said diaphragm.
Specification