Piping And Instrumentation Diagram Symbols
coalescer filter , flow element (vortex)
cartridge filter , flow element (quick change orifice plate)
turbine driven equipment , rotameter
motor driven compressor , local pickup psv pressure-vacuum
turbo expander/booster compressor , positive displacement meter
electric heater , modular double
compressor , gas detector
casings , flame detector
optional if multiple , restriction orifice
horizontal end suction , flow element (magnetic)
air driven , rupture disk (safety head)
pipe in pipe exchanger , flow element (turbine)
gas turbine , flow element (orifice plate)
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