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UM – P&ID Ancillaries Symbols Meaning
LV
Level Valve
M
Motor
TI
Temperature Indicator
LI
Level Indicator
PAH
Pressure Alarm High
TAH
Temperature Alarm High
PI
Pressure Indicator
PAHH
Pressure Alarm High Above PAH
TAHH
Temperature Alarm High Above TAH
FQ
Flow Indicator Totaliser
PSH
Pressure Switch High
TSH
Temperature Switch High
FAL
Flow Alarm Low
PSHH
Pressure Switch High Above PSH
TSHH
Temperature Switch High Above TSH
FSL
Minimum Flow Switch
PSV
Pressure Safety Valve
SUPPLY LIMIT
CANNON BONO
CUSTOMER