Self-actuated final control element symbol Moisture trap with equalizing line. Fusible plug or disk. Thermal safety element. Note required for other trap types. Steam trap. Generic moisture trap. Filled thermal system. Temperature regulator. Vacuum relief. …
Measurement symbols – secondary instruments Pressure Temperature Thermometer. Pressure gage. Multiple gages may be shown as one bubble or one bubble for each section. Gage glass externally mounted on vessel or standpipe. Sight glass. …
Measurement symbols – primary elements Bubble may be omitted if connected to another instrument. Strain gage or other electronic type sensor. May be through top of vessel. Insert probe. Guide wires may be omitted. Location …
Measurement symbols – measurement notations Weight, Force TRAN = Transistor SG = Strain gage P-V = Pressure-vacuum MAN = Manometer US = Ultrasonic TTS = Transit time sonic TAR = Target SON = Sonic PV …
Measurement symbols – auxiliary and accessory devices Bubble May Be Omitted If Connected To Another Instrument. Test Well, Flanged. Thermowell, Flanged. Diaphragm Chemical Seal, Welded. Diaphragm Pressure Seal, Welded. Diaphragm Chemical Seal, Flanged, Threaded, Socket …
Measurement symbols – primary elements and transmitters Insert Element In Or On Process Flow Line, Vessel, Or Equipment. Connecting Line Shall Be Equal To Or Greater Than 0.5 Inches (12 Millimeters). Transmitter With Remote Primary …
