Process pressure transmitter with polymer seal
First Claim
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1. A process pressure transmitter system, comprising:
- a process pressure transmitter housing;
a process pressure sensor in the process pressure transmitter housing;
a metal flange configured to mount to a process vessel which carries a process fluid; and
an isolation diaphragm attached to the metal flange and exposed to the process fluid through an opening in the process vessel, the isolation diaphragm comprising a polymer diaphragm gasket surface area bonded to a structured joining zone on a metal face of the metal flange;
a capillary passageway which carries a fill fluid from the isolation diaphragm to thereby convey a process pressure to the pressure sensor.
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Abstract
A process pressure transmitter system includes a process pressure transmitter housing and a process pressure sensor in the process pressure transmitter housing. A metal flange is configured to mount to a process vessel which carries a process fluid. An isolation diaphragm attaches to the metal flange and is exposed to the process fluid through an opening in the process vessel. The isolation diaphragm comprises a polymer diaphragm bonded to a metal face of the metal flange. A capillary passageway carries a fill fluid from the isolation diaphragm to thereby convey a process pressure to the pressure sensor.
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Citations
25 Claims
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1. A process pressure transmitter system, comprising:
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a process pressure transmitter housing; a process pressure sensor in the process pressure transmitter housing; a metal flange configured to mount to a process vessel which carries a process fluid; and an isolation diaphragm attached to the metal flange and exposed to the process fluid through an opening in the process vessel, the isolation diaphragm comprising a polymer diaphragm gasket surface area bonded to a structured joining zone on a metal face of the metal flange; a capillary passageway which carries a fill fluid from the isolation diaphragm to thereby convey a process pressure to the pressure sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25)
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24. A method of coupling a process pressure transmitter to a pressure of an industrial process fluid, comprising:
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obtaining a metal flange configured to couple to a process vessel, the metal flange including a structured joining region; obtaining a polymer diaphragm having a gasket surface area; attaching the gasket surface area of the polymer diaphragm to the structured joining region of the metal flange; applying a pressure of a process fluid carried in the process vessel to the polymer diaphragm; coupling the pressure applied to the polymer diaphragm to a pressure sensor using a capillary passageway; and measuring the process pressure using the pressure sensor.
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Specification