ISA Symbols
3-way solenoid 4-way solenoid valve with reset valve
Adsorption column
Adsorption dryer
Agitated batch crystallizer
Agitator blade
Agitator
Angle blowdown valve
Angle valve
Atmospheric tank
Autogenous grinder
Averaging pitot tube
Bag filter
Ball valve
Batch dryer
Belt conveyor
Belt dryer
Bin
Blowdown valve
Blower
Butterfly valve or damper
Capillary tube Capillary tube (long) (short)
Check valve Circuit breaker
Compressor
Computer Function, Auxiliary Location
Computer Function, Field Mounted
Computer Function, Primary Location
Cone roof tank
Control valve with hand actuator
Conveyor
Cooling tower
Cyclone separator
Cyclone
Cylinder actuated valve (double acting)
Delta connection
Diaphragm actuated valve with positioner
Diaphragm valve
Discrete Instrument, Auxiliary Location
Discrete Instrument, Field Mounted
Discrete Instrument, Primary Location
Distillation column with trays
Distillation tower
Distillation, packed column
Drum dryer
Drum mixer
Electric binary signal (long)
Electric Electromagnetic Electric signal Electric signal binary signal or sonic signal (long) (short) (short) (guided) (long)
Electromagnetic Electromagnetic Electromagnetic or sonic signal or sonic signal Electrostatic or sonic signal (not guided) (not guided) precipitator (guided) (short) (long) (short)
Elevator
Evaporator 1
Evaporator forced circulation
Evaporator natural convection
Evaporator
Finned exchanger
Floating roof tank
Floating roof vessel
Flow nozzle
ISA Symbols
Flow regulator, self-contained
Flow straightening vane
Flume
Forced air exchanger
Four way valve
Furnace
Fuse
Gas holder 1
Gas holder 2
Gate valve
Gyratory crusher
Hand control valve
Helical mixer
Hopper
Horizontal vessel
Hydraulic signal (long)
Hydraulic signal (short)
Internal system link Hydroscreen Inline mixer 1 Inline mixer 2 (software or data link) (long)
Internal system link (software or data link) (short)
Jacketed kettle
Jacketed vessel
Jaw crusher
Kettle
Liquid filter
Manual Manual contactor closed contactor open
Mechanical link (long)
Mechanical link (short)
Mill
Mixing tee
Motor
Open storage pile
Open tank
Orifice plate in quickchange fitting
Pachuca crystallizer
Packed adsorption column
Plate and frame Packed column filter press
Plug valve
Pneumatic binary signal (long)
Pneumatic binary signal (short)
Pneumatic signal (long)
PositivedisplacementPneumatic type flow signal (short) totalizing indicator
Precipitator
Pressure safety valve
Pressurebalanced diaphragm actuated
Programmable Programmable Logic Control, Logic Control, Auxiliary Field Mounted Location
Programmable Logic Control, Primary Location
Pump
Rack classifier
Reactor
Regulator Restriction Reciprocating Regulator, with external orifice drilled compressor self-contained pressure tap in valve
Restriction orifice
Ribbon blender
Rod ball mill
Roll blender
Roll crusher
ISA Symbols
Roll stand
Rotary actuated Rotary calciner
Rotary dryer Rotary feeder
Rotary filter
Rotary kiln
Rotary plug valve
Rotary separator
Rotary shelf dryer
Rupture disc (pressure)
Rupture disc (vacuum)
Screw conveyor 1
Screw conveyor 2
Scrubber 1
Scrubber
Settler thickener
Shared Display, Shared Control, Auxiliary Location
Shared Display, Shared Control, Field Mounted
Shared Display, Shared Control, Primary Location
Single port pitot tube or pitot-venturi tube
Solid bowl centrifuge
Sphere
Spray dryer 1 Spray dryer 2
Static mixer
Stop check valve
Target type sensor
Three way valve Transformer
Trap
Turbine- or propellertype primary element
Turbine
Undefined signal (long)
Undefined signal (short)
Vacuum crystallizer
Vacuum filter
Vacuum safety valve
Valve with actuator
Valve with bleed or purge Valve with long connection shaft under disc
Valve, fail indeterminate
Valve, fail locked
Valve
Variable area Venturi tube flow indicator
Vertical centrifuge
Vessel
Vibrating screen
Vortex sensor Weigh hopper
Weir
WYE connection
