Solenoid Valves

Common Solenoid Valve and other Pneumatic symbols.

a detailed view of pneumatic circuit symbols and their meaning. Valve symbols including solenoid valve symbols are those that are in common use.

Solenoid Valve Symbols:

Solenoid Valve and other Pneumatic System Common Symbols

and how they relate to solenoid valves and pneumatic equipment.

Solenoid Valve 2/2 Symbol2/2 Valve

2 Ports 2 Positions

Solenoid Valve 3/2 Symbol3/2 Valve

3 Ports 2 Positions

Solenoid Valve 4/2 Symbol4/2 Valve

4 Ports 2 Positions


Solenoid Valve 4/3 Symbol4/3 Valve

4 Ports 3 Positions

Solenoid Valve 5/2 Symbol5/2 Valve

5 Ports 2 Positions

5/3 Solenoid Drawing5/3 Valve

5 Ports 3 Positions

Accumulator SymbolAccumulator

Air Dryer SymbolAir Dryer

Air Motor SymbolAir Motor

Flow One Direction

Valve Flow Two Directions SymbolAir Motor

Flow Two Directions

Check DrawingCheck Valve

Spring Closed


Compressor SymbolCompressor


Solenoid Valve Cylinder SymbolCylinder

Spring Return


Valve Cylinder SymbolCylinder

Double Acting Double Rod

Valve SymbolCylinder

Double Acting

Single Fixed Cushion

Valve Cylinder SymbolCylinder

Double Acting

Two Adjustable Cushions

Valve Differential Pressure SymbolDifferential Pressure


Valve Direction Of Flow SymbolDirection Of Flow


Exhaust Line  Control Line SymbolExhaust Line / Control Line


Filters SymbolFilters



Filter SymbolFilter

Automatic Drain

Solenoid Valve Filter SymbolFilter

Manual Drain

Fixed Restriction SymbolFixed Restriction


Flixible Hose Line SymbolFlixible Hose Line


Flow Control DrawingFlow Control Valve


Flow Gauge SymbolFlow Gauge

Lever SymbolLever


Lines Connected SymbolLines Connected


Lines Crossing SymbolLines Crossing


Lubricator SymbolLubricator


Muscular Control SymbolMuscular Control


One Bypass Flow Path SymbolOne Bypass Flow Path

and Two Closed Ports

Valve One Flow Path SymbolOne Flow Path


Pedal or Treadle SymbolPedal or Treadle


Solenoid Valve Pilot Pressure SymbolPilot Pressure


Valve Pilot Pressure SymbolPilot Pressure


Solenoid Valve Plugged Port SymbolPlugged Port


Solenoid Valve Plunger or Position Indicator SymbolPlunger or Position Indicator

Pneumatic SymbolPneumatic

Pressure SymbolPressure

Actuated Switch

Pressure Gauge SymbolPressure Gauge


Valve Pressure Regulator Adjustable SymbolPressure Regulator Adjustable

Non Relieving

Pressure Regulator Adjustable SymbolPressure Regulator Adjustable

Self Relieving

Push Button SymbolPush Button





Roller SymbolRoller

Roller One Way SymbolRoller One Way

Shuttle DrawingShuttle Valve

Silencer SymbolSilencer


Solenoid and Pilot Manual Over Ride and Pilot SymbolSolenoid and Pilot Manual Over Ride and Pilot


Solenoid Single Winding SymbolSolenoid Single Winding



Spring SymbolSpring


Solenoid Valve Two Closed Ports SymbolTwo Closed Ports


Valve Two Distinct Positions SymbolTwo Distinct Positions

and One Transitory Centre Position

Two Flow Paths SymbolTwo Flow Paths


Solenoid Valve Two Flow Paths SymbolTwo Flow Paths


One Closed Port


Valve Two Flow Paths SymbolTwo Flow Paths


Cross Connection


Solenoid Valve Vacuum SymbolVacuum



Variable restriction Symbol Variable restriction

Working Line SymbolWorking Line



Valve Drawing Symbol

The following symbols are generally in accordance with BS1553-1 and BS5070

Different Line Types.

Line Types Symbol

Pipe Support Symbols

Pipe Supports Symbol

Symbols for fitting and representations.

Line Fittings Symbol

Symbols for Valves


Symbols for Valve Actuators

Actuator Drawing

Symbols for Instruments

Valve Instrumentation

Symbols for Flow Instruments

Solenoid Valve Instruments

Instrument Indentifiers

Measured Variable

Type of Conditioner

Type of Component

F = Flow

R = Recorder

T = Transmitter

L = Level

I = Indicator

M = Modifier

P = Pressure

C = Controller

E = Element

Q = Quantity

A = Alarm


T = Temperature


Connexion Solenoid Valve symbols from the UK's premier solenoid valve suppliers

Symbols for Process Equipment

The levels of detail for process equipment relates to the schematic type produced. A process flow sheet will only show basic levels of technical information sufficient to highlight essential process flow paths. An engineering line diagram of P and ID will show a lot more detailed comprehensive information and technical detail.

Equipment Process Plant -1

 Stainless Steel Valve Symbol

Equipment Process Plant - 2

Water WRAS Drawing

Equipment Process Plant - 3

Brass Solenoid Drawing

Line tags and equipment identification.

Solenoid Symbol

Reading Pneumatic Schematic Symbols

 Valve Symbol
5/2 Valve has 5 ports and 2 possible conditions
1.) B is pressurized and A is exhausted.
2.) A is pressurized and B is exhausted.
When the solenoid is NOT energized the B port is pressurized. The spring symbol defines the valve position at rest.
The Block
Solenoid Drawing
The block symbolizes the possible valve functions or positions. Example: A 5/2 valve schematic will be illustrated with 2 blocks describing two valve functions or positions/ A 5/3 valve schematic will show three blocks describing 3 possible valve functions.
The Actuator.
Valve Drawing Symbol
(Solenoid) Symbol
Pneumatic valves can be operated in several ways. Hand operated (including levers and push and or push pull buttons) : Air piloted (operated remotely by pneumatic signals) : Solenoid (directly actuated with electronic signals)
Exhaust Port Symbol
Valve CAD Symbol
The inverted triangle symbol Denotes an exhaust port. The letters EA indicate this is the exhaust port for the A circuit. Ebin turn indicated the exhaust port for the B circuit.
The Arrows
SV Symbol
The arrow symbols illustrate the direction of gasses flowing into and out of the valve ports. Gas pressure is supplied from port P. Depending on which of the valve blocks is in function, the gas is directed to port A or B as shown by the arrows.
The return spring
Solenoid Drawing
The spring symbol defines the “at Rest” position of the solenoid valve. The spring “pushes” from the side it is drawn on and places the right side block diagram of the valve in function.
The T Symbol
Solenoid Drawing
This symbol indicates that a port is closed and is neither passing or exhausting gas.
Solenoid Drawing
Pressure of air supply symbol
This symbol indicates the air supply port, in addition to this the letter P or the number 1 also indicated the air supply port.
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