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Pneumatic Schematics

Using Graphic Symbols to

Illustrate Basic Circuit Designs

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3/2 Solenoid

Valve

Regulator

Pneumatic Components

Single Acting Pull Type Cylinder

and Speed Valve

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Pneumatic Component

Symbols

3/2 Solenoid

Valve

Regulator

Single Acting Pull Type

Cylinder and Speed Valve

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The Symbols Can Be Arranged to

Illustrate Complete Circuits

Double Acting

Cylinder

HPA

Storage

Bottle

Regulator4/2 Valve

HP Gage

LP Gage

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A B

PEA EB

5/2 Solenoid Valve

Note: The center portwith the brass One

Touch Fitting is the

supply or pressure

port.

5/2 Solenoid ValveSymbol

Solenoid

Valve Body

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5/3 Solenoid ValveUsed on Double Acting Cylinders

The Solenoid Operates Like a Linear Pneumatic Motor

1.) Wire coil (red) is energized

2.) The electromagnetic field,

draws the iron armature (blue)

into the solenoid

3.) The valve spool (green)

moves with the iron

armatureSolenoid

Valve Spool

Springs return

valve spool to

rest position

AB

PEB EA

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A B

PEA EB

5/2 Solenoid ValveUsed on Double Acting Cylinders

5 Ports, 2 Positions

The 2 Dark Blocks Represent the

Two Possible Valve Positions

Solenoid

At Rest

Position

Solenoid

Energized

Position

B Pressurized : A Exhausted (rest)

A Pressurized : B Exhausted (energized)

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A B

PEA EB

5/2 Solenoid ValveUsed on Double Acting Cylinders

5 Ports, 2 Positions

Return Spring Symbol

Indicates the At Rest Position

Actuator Symbol with a

Diagonal Line Indicates

Solenoid Operation

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A B

PEA EB

5/2 Solenoid ValveUsed on Double Acting Cylinders

5 Ports, 2 Positions

Letters A and B Indicate the

Output Port Connections for

the Pneumatic Actuators

(Cylinders)

The Arrow Symbols

Indicate the Direction of

Gas Flow Through the

Valve

EA and EB

are ExhaustPorts. P is the

Gas Supply

Port

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Hopefully the Hieroglyphics of

Pneumatics are More Understandable

Double Acting

Cylinder

HPA

Storage

Bottle

Regulator4/2 Valve

HP Gage

LP Gage

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Watch the 2 Position Valve and

Double Acting Cylinder

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EAEB P

AB

A B

PEA EB

5/2 Valve

5 Ports 2 Positions

5/3 Valve5 Ports 3 Positions

Can You Explain the Difference?

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Pictorial Drawing of a 5/3 Valve and

Double Acting Cylinder

PEB EA

ABNote: At Rest, Ports A and

B are Exhausted P is

Closed

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Mini Pneumatic CircuitsPressurized Storage Bottle

Regulator

3/2

Valves

Pneumatic Cylinders

with Speed Valves

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Pneumatic Schematics

The Best Way to Learn Them, Is

to Draw Them.Try It.