Process pressure transmitter with polymer seal
AssigneeRosemount Inc.
InventorBaogang Li
Life of this patent
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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.
Claims25
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.
A method of coupling a process pressure transmitter to a pressure of an industrial process fluid, comprising:
- 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.
Dependencies are inferred from the claim text.