Corrosion resistant isolator assembly for process devices

摘要

A process device has a process seal for coupling to an industrial process. The process device includes a process device body having an isolation cavity and an isolation passageway extending from the isolation cavity to a pressure sensor. The isolation cavity and isolation passageway filled with an isolation fluid. An isolation diaphragm is positioned to isolate the isolation cavity from process fluid. The isolation diaphragm has a process fluid side and an isolation fluid side. A weld ring is positioned around a periphery of the process fluid side of the isolation diaphragm. The weld ring is formed of a first material compatible with the isolation diaphragm and a second material compatible with the process device body. A weld secures the weld ring to the process device body.

主权项

1. A process device having process seal for coupling to an industrial process, comprising:
a process device body having an isolation cavity and an isolation passageway extending from the isolation cavity to a pressure sensor, the isolation cavity and isolation passageway filled with an isolation fluid; an isolation diaphragm positioned to isolate the isolation cavity from process fluid, the isolation diaphragm having a process fluid side and an isolation fluid side; a weld ring positioned around a periphery of the process fluid side of the isolation diaphragm, the weld ring being formed of a first material compatible with the isolation diaphragm and a second material compatible with the process device body; a foil washer having an inside diameter and an outside diameter, the inside diameter being attached to a portion of the weld ring formed of the first material and positioned on a surface of the weld ring opposite the isolation diaphragm; and a weld securing the weld ring to the process device body.