ChE 521 Notes Control Signs and Symbols 1
Prepared: rfringor, che
General Equipment Symbols
Breaker Cyclone Electric Motor
Crusher
Tank Truck
Roll Crusher Centrifuge
Hammer Crusher Dryer Tank Car
Ball Mill Conveyor
Mixer Boom Loader
Scraper Conveyor
Kneader
Blender Screw Scraper
Fluid Separators Elevator
Filter
Skip Hoist
Rotary Filter
Screen Overhead Conveyor
Electromagnetic Hoists
Equipment – Heat Exchangers
Heat Exchanger Evaporation Condenser
Shell and Tube Condenser (Air Cooled)
Tube Bundle
Oil Separator
Kettle Reboiler
Chilling Evaporator
Air-blown cooler
Air Cooling Evaporator
Plate Type
Finned Tube Extractor Hood
Double pipe type
Oil Burner Autoclave
Boiler Fan Blades
Fired Heater
Triple Fan Blades
Coolinng Tower
Condenser
Automatic stoker
Refrigerators
ChE 521 Notes Control Signs and Symbols 2
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General Intrument Symbols
Analog Instrument, Pressure Gauges Propeller Meter
I-1
accesible board-mounted P
Computer-based Thermometer Generic Utility
I-2 algorithmn T
A
Flow Meters Operator Box
B
I-3 PLC F
AND Gate
I-4 Computer Indicator / Recorder
0-100
deg
OR Gate
I-5 Lights mV Converter
10-50
Analog Instrument,
I-6 Mounted behind board Venturi NOT Gate
Stream Trace Flowmeter Connecting Element
I-7
FI
I-8 I-9 Double Rotameter Diamond
I-10
Level Meter Vortex Sensor
Signal and Process Lines
Signal Heat Trace
Data Link Mechanical Link
Pneumatic Mechanical Link 1
Pneumatic 1
Pneumatic Binary
Electric
Electric 1
Electric Binary
Electric Binary 1
Capillary Tube
Hydraulic
Hydraulic 1
Electromagnetic
Heated / Cooled
ChE 521 Notes Control Signs and Symbols 3
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Pipelines
Major Pipeline
Major PipelineR
Major PipelinesL
Minor Pipeline
Minor PipelineR
Minor PipelineL
Valves and Fittings
Gate Valve Reducing Valve End Caps
Plug Valve
Globe Valve Electrically
Bonded
Screw-double Valve 3- way Plug Valve Electrically Insulated
Check Valve Mixing Valve Bursting Disc
Stop check Valve
Flame Arrestor
Character, Port
Diaphragm Valve
strainer
Powered Valve Valve Manifold
Separator
Needle Valve Reducer
Exhaust Silencer
Butt Weld
Relief Valve
Turdish
Angle Valve Flanged/Bolted Bell Mouth
Exhaust Head
Soldered / Solvent
Float Operated
Open Vent
Flanged Valve
Screwed joints
Syphon drain
Butterfly Valve Socket with Spigot Hydrant
Wedge / Parallel Drain silencer
Sleeve joint
Ball Valve
Socket Weld
Y strainer
Relief (angle)
Swivel joint Liquid Seal Open
/ Closed
ChE 521 Notes Control Signs and Symbols 4
Prepared: rfringor, che
Equipment - Pumps
In-line Pump Reciprocating Pump
Positive Displacement Reciprocating Pump 1
Centrifugal Pump Selectable Fan
Rotary 1 Centrifugal Pump
Rotary 2 Axial flow Fan
Proportionating Pump Ejector / Injector
Selectable Pump Spray
Selectable Compressor
Rotary Compressor
Motor Drive
Compressor / Turbine
Equipment – Vessels
Vessel Storage Tank Flanged Access Point
Column Barrel
Tray Column Gas Cylinder
Contacting Liquid Bag
Reaction Vessel Carrying Vessel
Open Tank Tank
Liquid Level
Clarifier
Closed Tank Branch Fitting
Covered Tank Access Point
Gas Holder
ChE 521 Notes Control Signs and Symbols 5
Prepared: rfringor, che
PROCESS AND INSTRUMENT SYMBOLS
Process Variable Symbol Type of Instrument Symbol
Analyses A Alarm A
Burner B Users Choice B
Combustion B Controller C
Users Choice C Control valve CV
Users Choice D Trap CV
Voltage V Sensor (primary element) E
Flow Rate F Rupture disc E
Users Choice G Sight or gage glass G
Current (electric) I Monitor G
Power J Indicator I
Time K Control Station K
Level L Light (pilot/operation) L
Users Choice M Users Choice N
Users Choice N Flow Resistance Orifice O
Users Choice O Test point (sample point) P
Pressure / Vacuum P Recorder R
Radiation R Switch S
Speed (or Frequency) S Transmitter T
Temperature T Multifunction U
Multivariable U Valve/Damper V
Vibration V Well W
Weight (force) W Unclassified X
Unclassified X Relay Y
Event Y Driver Z
Position, dimension Z Actuator Z
ChE 521 Notes Control Signs and Symbols 6
Prepared: rfringor, che
Letter Codes and Balloon Symbols
FC Locally Mounted FC Control Room
117 Mounted Behind Board
117
FC Control Room FC Instruments Locally
Board Mounted Panel Mounted
117 117
