7.5. INSTRUMENT AND PROCESS EQUIPMENT SYMBOLS
7.5.5Valve actuator types
Diaphragm |
Electric motor |
Solenoid |
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Electric motor Diaphragm w/ hand jack w/ hand jack
M |
Hand (manual) |
Piston Diaphragm w/ positioner w/ positioner
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P |
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P |
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547
Piston
Electro-hydraulic
E/H
548 |
CHAPTER 7. INSTRUMENTATION DOCUMENTS |
7.5.6Valve failure mode
Fail open
(or)
FO
Fail locked
(or)
FL
Fail last/drift open
(or)
FL/DO
Fail closed
(or)
FC
Fail indeterminate
Fail last/drift closed
(or)
FL/DC
7.5. INSTRUMENT AND PROCESS EQUIPMENT SYMBOLS |
549 |
7.5.7Liquid level measurement devices
Bubbler (dip tube) |
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Capacitive |
Tape-and-float |
LT |
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LT |
LT |
XFI |
Air |
CA |
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(vessel) |
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(vessel) |
(vessel) |
Hydrostatic |
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Hydrostatic (w/ seals) |
Displacer |
(vessel) |
(vessel) |
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(vessel) |
LT |
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LT |
LT |
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Radar (guided) |
Radar (non-contact) |
Ultrasonic |
Laser |
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LT |
LT |
LT |
LT |
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Radar |
Radar |
US |
Laser |
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(vessel) |
(vessel) |
(vessel) |
(vessel) |
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550 |
CHAPTER 7. INSTRUMENTATION DOCUMENTS |
7.5.8Flow measurement devices (flowing left-to-right)
Orifice plate |
Pitot tube |
Averging pitot tubes |
(or)
Flume |
Weir |
Turbine |
Target |
Positive displacement |
Vortex |
Coriolis |
Rotameter
7.5. INSTRUMENT AND PROCESS EQUIPMENT SYMBOLS |
551 |
Ultrasonic |
Magnetic |
Wedge |
V-cone |
M
Flow nozzle |
Venturi |
Generic
FE