Produce transformer and method for coupling working pressure to pressure sensor

Abstract

A process transmitter for measuring a process pressure includes a pressure sensor in a sensor housing. An isolation diaphragm which isolates fill fluid from process fluid is spaced apart from a process fluid seal. The spacing reduces deformation of the isolation diaphragm due to a mounting force.

Description

technical field [0001] The present invention relates to a process control device, and more particularly, to a work fitting for coupling a pressure transmitter to a working fluid. Background technique [0002] Industrial operations such as refineries, chemical plants, etc. use remote sensors called "transmitters" to detect various operating variables such as pressure, temperature, flow, etc. The sensed work variables are used to monitor and / or control the operation of the work. [0003] Transmitters that sense the pressure of the working fluid use a pressure sensor that is usually coupled to at least one isolating diaphragm. A transmitter is connected to the flange and includes an opening aligned to receive working fluid from the passage of the flange. The isolation diaphragm sits at the opening of the transmitter and isolates the pressure sensor from the fluid being sensed. This protects the sensor from damage or corrosion by the working fluid. Pressure is transmitted fr...

AI Technical Summary

Problems solved by technology

[0005] Connection forces compressing the weld ring and the flange can deform or deflect parts of the weld ring and the transmitter housing

Additionally, connection forces can create stress in the diaphragm and cause the diaphragm to deform or deflect

This deformation or deflection of the diaphragm can lead to inaccurate results in pressure measurements when measuring pressure accurately

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