Our High Pressure Separator Level Control Valve is LCV 25, dump valve is LCV 26, pressure control valve is PCV 85. Are these industry standards or site specific. The first alph character pertains to the measured variable. A analysis, F flow, L level, P pressure, T temperature and others. Sometimes there is a modifier like PDT for pressure differential transmitter. Subsequent letters pertain to indication functions, output functions, etc. The V in LV pertains to valve, T for transmitter. Other examples include C for control, A for alarm, S for switch and a confusing on Y for relay or other computing elements or converters, etc. Additional letters often modify these letters such as LAHH for level alarm high-high at the shutdown setting that is set higher than the LAH that pre-alarms the high level. LC is for level controller; or LIC for level indicating controller. Many people use LIT for level indicating transmitter with a local indication.

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