Differences among various interlock valves in the SIS system

2018-05-21 View Original

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As shown in the figure, are there any differences in the interlocking between HSV, USV, and MSV? Please share your thoughts; extra points for that

Reply #2 2018-05-22

According to \"HG_T 20505-2014 Functional Indicators and Graphic Symbols for Process Measurement and Control Instruments\", HSV generally refers to a manually operated remote control valve, USV is commonly known as a switch (shutting off) valve, while the others are not explicitly defined.

Reply #3 2018-06-08

SIS refers to the Safety Instrumented System

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Differences among various interlock valves in the SIS system

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