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Pneumatic Symbols
For system diagrams and component
identification
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Contents
Standards Actuators
Click the section to advance directly to it
Basic symbols
Functional elements
Flow lines
Connections Conditioners and plant
Pressure regulators
Relief valves
Valve symbol structure
Valve functions
Three position valves
Operators Port marking
Function components
Symbol Library
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Graphic Symbols Standards
Pneumatic symbols conform to and are devised from the
International Standard ISO 1219-1 1991
This covers graphical symbols for Fluid Power Systemsand Components
Port markings for fluid power valves are not covered by
the ISO standard. These are taken from the
recommendations of CETOP RP 68 P
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Basic Symbols
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Shapes These shapes and lines in the relative proportions shown,
make up a set of basic symbols from which fluid power
symbols and circuits are constructed
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Basic Symbols (shapes) Symbol sets can be drawn to any size but their scale and
relative proportions are determined by a basic dimensionof your choice l
Circles l energy conversion units
l3/4 measuring instrument
l1/3 mechanical link
l1/3 roller
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Basic Symbols (shapes)
Square at
45o
conditioning apparatus
connections to corners
Square control componentconnections
perpendicular to sides
Rectangle cylinders and valves
l
l
l
> l
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Basic Symbols (shapes)
certain controlmethods, length
between limits to
suit
Rectangles
cushion
continued
piston
max 2l
min 1l
1/2l
l
1/4l
1/4l
1/2
l
1/2l
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Basic Symbols
rotary actuator, motor
or pump with limited
angle of rotation
Semi-circle
mechanical connection
piston rod, lever, shaftDouble line
Capsule pressurised reservoirair receiver, auxiliary
gas bottle
l
1/5l
2
l
l
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Basic Symbols
Line Working line, pilot supply,return, electrical
Chain Enclosure of two or more
functions in one unit
Dashed Pilot control, bleed, filter
Line Electrical line
1
2
3
12 10
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Functional Elements
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Functional Elements
Long sloping indicates
adjustabilityArrow
1/3l
size to suitSpring
Triangle Direction and nature of fluid,open pneumatic or filled
hydraulic
1/4l1/2l
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Functional Elements
Straight or sloping
path and flow
direction, or motion
Arrows
Size to suitRestriction
Tee Closed path or port
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Functional Elements
90oangleSeating
rotary motionCurved arrows
clockwise from right hand endShaft rotation
anti-clockwise from right hand end
both
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Functional Elements
Indication or control
size to suitTemperature
Operator Opposed solenoidwindings
Prime mover M MElectric motor
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Flowlines and Connections
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Flowlines
not connectedCrossing
Junction Single
Hose usually connecting
parts with relative movementFlexible
line
JunctionFour way junction
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Connections
ContinuousAir bleed
Air exhaust No means ofconnection
Temporary by probe
With means of
connection
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Connections
Both to exhaustCoupling quick
release
Coupling quick
release self sealing
Source sealed
Coupling quickrelease self sealing
Both sealed
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Connections
Rotary connection one
line
Rotary connection two
lines
Rotary connectionthree lines
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Conditioners and PressureProducing Plant
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Conditioners Water separator with manual drain
Water separator with
automatic drain
Filter with manual drain
Filter with automatic drain
Lubricator
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Conditioners Dryer
Cooler with and withoutcoolant flow lines
Heater
Combined heater / cooler
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Plant Compressor and electric motor
Air receiver
Isolating valve
Air inlet filter
M
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Pressure Control
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Pressure regulators A pressure regulator symbol represents a normalstate with the spring holding the regulator valve
open to connect the supply to the outlet. The dotted line represents the feedback, this opposes thespring and can vary the flow through the valve from full
flow, through shut off, to exhaust. The symbol is usuallydrawn in only this one state. The flow path can be imagined
to hinge at the right hand end to first shut off the supply
then connect to the exhaust.
Adjustable Regulator with
pressure gauge simplified
Adjustable Regulator
simplified
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Filter Regulator Lubricator
FRL Combined unit
FRL Simplified symbol
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Pressure relief valves A pressure relief valve symbol represents a normal state
with the spring holding the valve closed.
Adjustable relief valve
simplified
The dotted line represents feed-forward, this opposes
the spring and can be imagined to lift the flow path.
When the pressure reaches an excess value the flowpath will line up with the ports and flow air to relief.
Preset relief valve
simplified
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Actuators
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Actuators Cylinders symbols can be
any length over l
The piston and rod can be
shown in the retracted,
extended or any intermediate
position
l
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Single acting Single acting sprung
instroked
Single acting sprung
outstroked
Single acting sprung
instroked magnetic*
Single acting sprungoutstroked magnetic *
* ISO 1219-1 provides no example for magnetic cylinders
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Single acting without spring
Single acting normally instroked
external force returns
Single acting normally outstroked
external force returns
Single acting normally instroked
magnetic external force returns
Single acting normally outstrokedmagnetic external force returns
Note: the hardware is usually double acting cylinders applied as single acting
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Double acting
Double acting adjustable
cushions
Double acting through
rod
Double acting magnetic *
Double acting rodless *
* ISO 1219-1 provides no example for magnetic or rodless cylinders
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Rotary actuators
Semi rotary double
acting
Rotary motor single
direction of rotation
Rotary motor bi-
directional
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Simplified cylinder symbols
Single acting load returns
Single acting spring
returns
Double acting non
cushioned
Double acting adjustable
cushions
Double acting
through rod
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Valve symbol structure
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Valve symbol structure The function of a valve is given by a pair of
numerals separated by a stroke, e.g. 3/2..
The first numeral indicates the number of
main ports. These are inlets, outlets and
exhausts but excludes signal ports and
external pilot feeds.
The second numeral indicates the number
of states the valve can achieve.
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Valve symbol structure A 3/2 valve therefore has 3 ports (normally
these are inlet, outlet and exhaust) and 2
states (the normal state and the operatedstate)
The boxes are two pictures of the same
valve
normaloperated
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Valve symbol structure A valve symbol shows the pictures for each
of the valve states joined end to end
normaloperated
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Valve symbol structure A valve symbol shows the pictures for each
of the valve states joined end to end
normaloperated
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Valve symbol structure The port connections are shown to only one
of the diagrams to indicate the prevailing
state
normal
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Valve symbol structure The operator for a particular state is
illustrated against that state
Operated state
produced by
pushing a button
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Valve symbol structure The operator for a particular state is
illustrated against that state
Operated state
produced by
pushing a button
Normal state
produced by
a spring
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Valve symbol structure The operator for a particular state is
illustrated against that state
Operated state
produced by
pushing a button
Normal state
produced by
a spring
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Valve symbol structure The valve symbol can be visualised as
moving to align one state or another with
the port connections
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Valve symbol structure The valve symbol can be visualised as
moving to align one state or another with
the port connections
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Valve symbol structure The valve symbol can be visualised as
moving to align one state or another with
the port connections
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Valve symbol structure A 5/2 valve symbol is constructed in a
similar way. A picture of the valve flow
paths for each of the two states is shown bythe two boxes. The 5 ports are normally an
inlet, 2 outlets and 2 exhausts
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Valve symbol structure The full symbol is then made by joining the
two boxes and adding operators. The
connections are shown against only theprevailing state
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Valve symbol structure The full symbol is then made by joining the
two boxes and adding operators. The
connections are shown against only theprevailing state
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Valve symbol structure The full symbol is then made by joining the
two boxes and adding operators. The
connections are shown against only theprevailing state
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Valve symbol structure The boxes can be joined at either end but
the operator must be drawn against the state
that it produces. The boxes can also beflipped
A variety of symbol patterns are possible
normallyclosed
normallyopen
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Valve symbol structure The boxes can be joined at either end but
the operator must be drawn against the state
that it produces. The boxes can also beflipped
A variety of symbol patterns can be
produced
Reverse connected
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Valve functions
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Valve functions
Function 2/2
Function 3/2
Normal position
Basic valves beforeoperators are added
Examples, push button operatedwith spring return
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Valve functions
Function 2/2
Function 3/2
Operated position
Basic valves beforeoperators are added
Examples, push button operatedwith spring return
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Valve functions
Function 5/2
Function 4/2
Normal position
Basic valves beforeoperators are added
Examples, push button operatedwith spring return
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Valve functions
Function 5/2
Function 4/2
Operated position
Basic valves beforeoperators are added
Examples, push button operatedwith spring return
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Valve functions 5/3 Three position valves have a normal central
position that is set by springs or with a
manual control such as a lever
The flow pattern in the centre position
varies with the type. Three types will be
considered 1, All ports sealed
2, Outlets to exhaust, supply sealed
3 Su l to both outlets exhausts sealed
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Valves 5/3
All valves types shown in the normal position
Type 1. All ports sealed
Type 2. Outlets to exhaust
Type 3. Supply to outlets
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Valves 5/3
All valves types shown in the first operated position
Type 1. All ports sealed
Type 2. Outlets to exhaust
Type 3. Supply to outlets
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Valves 5/3
All valves types shown in the normal position
Type 1. All ports sealed
Type 2. Outlets to exhaust
Type 3. Supply to outlets
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Valves 5/3
All valves types shown in the second operated position
Type 1. All ports sealed
Type 2. Outlets to exhaust
Type 3. Supply to outlets
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Operators
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OperatorsGeneral manual
Push button
Pull button
Push/pull button
Lever
Pedal
Treadle
Manual
Rotary knob
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OperatorsMechanicalPlunger
Spring normallyas a return
Roller
Uni-direction
or one way trip
Pressure
Pilot pressure
Differential pressure
Detent in 3 positions
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OperatorsSolenoid
direct
Solenoid pilot
Solenoid pilot
with manual override
and integral pilotsupply
Solenoid pilot
with manual
override and
external pilot
supply
Electrical
When no integral
or external pilot
supply is shown it
is assumed to beintegral
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Port markings
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Port Markings
1
212 10
1
24
5 3
14 12
1
2
3
12 10
To CETOP RP68P
1
2 4
3
14 12
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Port Markings
1
212 10
1
24
5 3
14 12
1
2
3
12 10
1
2 4
3
14 12
To CETOP RP68P
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Port Markings
1
212 10
1
24
5 3
14 12
1
2
3
12 10
1
2 4
3
14 12
To CETOP RP68P
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Port Markings
1
212 10
1
24
5 3
14 12
1
2
3
12 10
1
2 4
3
14 12
To CETOP RP68P
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Function components
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Function components Non-return valvesimplified Flow regulator uni-
directional
Flow regulator bi-
directional simplified
Note:The output can exhaust
back and is not trapped Two pressure AND
simplified
Shuttle valve OR
simplified
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Function components Quick exhaust valvewith silencersimplified Silencer
Pressure to electric
switch preset
Pressure to electric
switch adjustable
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Symbol Library Actuators
Solenoid Valves
Valves
Air Line
Click the section arrow to go to it
Function Components
Vacuum
Electrical and
electronic
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Symbol Library
Actuators
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Single acting cylinders
Sprung in
Sprung out
Magnetic
sprung in
Magnetic
sprung out
Magnetic
sprung in
non-rotating
rod
Magnetic
sprung out
non-rotating
rod
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Single acting cylinders
Sprung in
adjustable
cushion
Sprung out
adjustable cushion
Magnetic sprung in
adjustable cushion
Magnetic sprung out
adjustable cushion
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Single acting cylinders
Sprung in
adjustable
cushion non-
rotating rod
Sprung out
adjustable cushion
non-rotating rod
Magnetic sprung in
adjustable cushion
non-rotating rod
Magnetic sprung out
adjustable cushion
non-rotating rod
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Single acting bellows
Bellows single
convolution Bellows doubleconvolution
Bellows triple
convolution
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Double acting cylinders Non-magnetic
Non-magnetic
adjustable
cushioned
Non-magnetic
rod bellows
Magnetic
hydraulic
Magnetic
adjustable
cushioned
Magnetic
adjustable
cushionedrod bellows
Magnetic
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Double acting cylinders Non-rotating rod
Active
brake
Passive
brake
Magnetic
non-
rotating rod
Magnetic
active brake
Magnetic
passive
brake
Guided
rod
magnetic
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Double acting cylinders Non-magnetic throughrod
Non-magnetic adjustable
cushioned through rod
Magnetic
through rod
Magnetic adjustable
cushioned through rod
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Double acting cylinders Three position adjustablecushions (equal strokes)
Three position adjustable
cushions magnetic (equalstrokes)
Four position adjustable
cushions (unequal
strokes)
Four position adjustable
cushions magnetic
(unequal strokes)
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Other actuators With electronic analogueoutput of piston position
Slide unit
Semi-rotary actuator
Rotary motor bi-directional
and non-reversible
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Rodless cylinders Cushioned Cushioned
magnetic
Cushioned
passive
brake
Cushioned
magnetic
passive brake
Cushioned
active brake
Cushioned
magneticactive brake
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Rodless cylinders Twinstroke
cushioned
Twin stroke
cushioned
magnetic
Twin strokeair through
carriage
Twin stroke
air through
carriage
magnetic
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Shock absorbers Selfadjusting
Adjustable
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End
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Symbol Library
Air Line Equipment
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Combination units
FRL with shut off
valve and pressuregauge Lubro-control unit
Filter and lubricator
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Combination units
Breathing air set
Filter regulator
Filter regulator with
gauge
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Pressure regulators
Pre-set relieving
Adjustable relieving
Adjustable relieving withpressure gauge
Pre-set relieving with
pressure gauge
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Pressure regulators
Pilot operated
Pilot operated regulator
controlled from pilot
regulator
Pilot regulator with
independent feedback
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Pressure regulators
Precision dual stage
(11-818) Proportional pressure
valve1
2
3
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Lubricator
Lubricator
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Pressure relief valves
Preset, no means of
connection to exhaust
Adjustable, no means of
connection to exhaust
Preset, tapped exhaust
port
Pilot operated
Adjustable, tappedexhaust port
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Other components
Silencer
Water separator
automatic drain
Filter silencer
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End
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Symbol Library
Electrical and Electronic
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Sensors Reed switch 2 wire Reed switch changeover
Reed switch 3 wire with led indicator
(emulating current sinking npn device)
Reed switch 3 wire with led indicator(emulating current sourcing pnp device)
Reed switch 2 wire with led indicator
blue
brown +V
Load0V
brown +V
blue
black
0V
0VLoad
Load
brown +V
blue 0V
Load0Vblack
brown +V
blue 0V
Load+Vblack
brown +V
blueLoad
0V
Loads must be additionally suppressed
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Sensors Solid state magnetic sensor pnp
(current sourcing) Solid state magnetic sensor plug in cable
pnp (current sourcing)
Solid state magnetic sensor plug in
cable npn (current sinking)
Solid state magnetic sensor npn(current sinking)
Solid state magnetic sensor with pulseextension
brown +Vblue 0V
blackpnp
Load 0V
1
3
4pnp
brown +V
blue 0V
black Load 0V
1
brown +V
blacknpn
Load +V
blue 0V
3
4npn
brown +V
black Load +V
blue 0V
blackLoad 0V
brown +V
blue 0V
Loads must be additionally suppressed
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Sensors
Reed switch 2 wire with led
indicator and plug in cable Reed switch 2 wire with led indicator and
plug in cable
1
+ brown
blue
1
4
brown +V
blackLoad 0V
Load 0V
Loads must be additionally suppressed
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Electrical Symbols
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Electrical symbols Direct
current
( DC )
Alternating
current ( AC )
AC or DC
Positive and
negative polarity
Line to earth
Line to chassis
Cell
Battery 12 Vor
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Electrical Components
Supply andreturn
Proximity switch
Touch sensitive
switch
Pressure switch
Bell
Buzzer
Microphone
Loudspeaker
P
24V
0V
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Electronic Components Opto-isolator Windings
inductor
inductor with core
variable inductor
transformer
Capacitors
capacitor
polarisedcapacitor
variable capacitor
pre-set capacitor
Diodes
diode
zener diode light emitting diode
or
V
Resistors
Resistor
Variable
Potentiometer
Pre-set pot
Voltage
dependent Light
dependent
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Electronic Components Thyristor
Photo-
transistor
Triac
NPN Transistor
PNP Transistor
Fuse
Wires connected
Wires crossing
Double junction
or
or
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Electronic Components Conductors
in a cable
Meters for
amps, volts,
ohms & watts
Conductors
twisted
Plug and socket
Coaxial plug and
socket
Motors dc & ac
Generator
Lamp steady
& flashing
Operational
amplifier
MM
A
W
V
G
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End
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Symbol Library
Function Fittings and Components
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Function fittings Blocking fitting
1
212
1
2
1
2
Pressure reducingfitting
Pneumatic sensorfitting
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Function components Air fuse
Non return valve
Non return valve
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Function components bi-directional flow
regulator Exhaust flow
regulator with and
without silencer
Shuttle valve OR
Silencers
Two pressure valve
AND (will exhaust
either signal back)
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Function components Uni-directionalflow regulator
Rotating joint
Quick exhaust
valve with and
without silencer
Pressure indicator
Pressure drop
indicator
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Quick release couplings
Both sealed
Source sealed
Both to exhaust
made released
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Symbol Library
Solenoid Valves
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Solenoid valves
Direct solenoid
actuated spring return2/2 NC
Direct solenoid actuated
spring return 3/2 NC
Direct solenoid actuatedspring return 3/2 NO
with man override
on the solenoid
2
12 210
21012
21012
13
1
2
3
1012
1
2
3
12 10
13
12 10
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Solenoid valves1
24
5 3
14 12
Pilot solenoid
actuated spring return,
5/2
Pilot solenoid actuated
spring return and manualoverride, 5/2
Pilot solenoid actuated
pilot solenoid return, 5/2
Pilot solenoid actuatedpilot solenoid return and
manual override, 5/2
1
24
5 3
14 12
1
24
5 3
14 12
1
24
5 3
14 12
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Solenoid valves24
Pilot solenoid
actuated spring return,
5/2
Pilot solenoid actuated
spring return and manualoverride, 5/2
Pilot solenoid actuated
and returned, 5/2
Pilot solenoid actuatedand returned with manual
overrides, 5/2
15 3
14 12
1
24
5 3
14 12
24
15 3
14 12
1
24
5 3
14 12
Reverse piped
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Solenoid valves Double pilot solenoid
actuated spring to
centre all ports sealed
reverse piped 1
2
3
1012
1
24
5 3
14 12
Priority pilot solenoidactuated differential air
return, 3/2
Priority pilot solenoid
actuated differential air
return, 5/2
1
24
5 3
14 12
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Solenoid valves Pilot solenoid
actuated spring return,
manual override, 5/2with integral flow
regulators
Double pilot solenoidactuated, manual
override, 5/2 with integral
flow regulators
1
24
5 3
14 12
1
24
5 3
14 12
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Solenoid valves Double pilot solenoid
actuated, spring to
centre all ports sealed,
5/3 with integral flow
regulators
Double pilot solenoidactuated, spring to centre
supply port sealed, 5/3 with
integral flow regulators
Double pilot solenoid
actuated, spring to centresupply to outlets, 5/3 with
integral flow regulators
1
24
5 3
14 12
1
24
5 3
14 12
1
24
5 3
14 12
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Proportional solenoid valves Proportional flow to
electrical signal
Proportional pressure toelectrical signal
24
15 3
1
2
3
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Safety related valves Monitored dump
valve
1
2
3
1012
Soft start valve
1
2
3
12
10
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End
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Symbol Library
Valves
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Valves un-tapped exhaust Plunger actuated
spring return 3/2
Rotary knob actuated
detented 3/2
Key actuated
detented 3/2
1
2
3
12 10
1
2
3
12 10
1
2
3
12 10
1
2
3
12 10
1
2
3
12 10
Push button actuated
spring return 3/2
Roller actuated spring
return 3/2
Toggle actuated
detented 3/2
1
2
3
12 10
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Valves external bleed supply Plunger / bleed
actuated air return 3/2
Antenna / bleed actuated
air return 3/2
2
One way trip / bleed
actuated air return 3/2
Roller / bleed actuated air
return 3/2
Low pressure / bleed
actuated air return 3/2
2
12 10
3
1
212 10
3
1
12 10
3
1
212 10
3
1
212 10
3
1
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Pilot actuated valves Pilot actuated spring
return 2/2 Pilot actuated springreturn 3/2
Differential pilot actuated3/2
1
2
3
12 10
21012
1
12 210
1
NC NO
2
13
12 10
1
2
3
12 102
13
12 10 Double pilot actuated 3/2
2
13
12 10
1
2
3
12 10
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Pilot actuated valves Pressure or vacuum
actuated spring
return 2/2(diaphragm valve)
Low pressure pilot
actuated spring
return 3/2
Low pressure pilotactuated and
returned, 3/2
NC NO
Low pressure pilot
actuated pilot
return, 3/2
1
2
3
1210
2
13
1210
2
13
12 10
1
2
3
12 10
2
13
12 10
1
2
3
12 102
13
12 10
1
2
3
12 10
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Pilot actuated valves Remote pressure
bleed actuated
spring return, NC,3/2
Remote pressure
bleed actuated spring
return, NO, 3/2
Remote pressure
bleed actuated spring
return, 5/2
1
2
3
12 10
12 2
10
1
12 210
1 1
24
5 3
14 12
2
13
12 1012 2
10
1
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Pilot actuated valves Pilot actuated spring
return, 4/2 Pilot actuated spring
return, 5/2
Double pilot actuated 5/2
24 Differential pilot actuated
5/2
1
2 4
3
14 12
15 3
14 12
1
24
5 3
14 12
1
24
5 3
14 12
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Pilot actuated valves Double pilot actuated
spring to centre all
ports sealed
Double pilot actuatedspring to centre supply
port sealed
Double pilot actuated
spring to centre supply tooutlets
1
24
5 3
1
24
5 3
1
24
5 3
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Mechanically actuated valves
Plunger actuated
spring return 2/2 Plunger actuated springreturn 3/2
Plunger actuated air reset
3/2
NC NO
2
13
12 10
12 210
1
1
2
3
12 10
21012
1
1
2
3
12 102
13
12 10
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Mechanically actuated valves Plunger actuated
spring return, 4/2
Plunger actuated springreturn, 5/2
Plunger actuated air reset
5/2
1
24
5 3
14 12
1
2 4
3
14 12
1
24
5 3
14 12
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Mechanically actuated valves
Roller actuated spring
return 2/2 Roller actuated springreturn 3/2
Roller actuated air reset
3/2
2
NC NO
2
13
12 10
13
12 10
2
13
12 10
1
2
3
12 10
12 210
1
21012
1
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Mechanically actuated valves Roller actuated spring
return, 4/2
Roller actuated springreturn, 5/2
Roller actuated air reset
5/2
1
24
5 3
14 12
1
2 4
3
14 12
1
24
5 3
14 12
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Mechanically actuated valves
One way trip actuated
spring return 2/2 One way trip actuatedspring return 3/2
One way trip actuated air
reset 3/2
NC NO
1
2
3
12 102
13
12 10
12 210
1
21012
1
1
2
3
12 102
13
12 10
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Mechanically actuated valves One way trip actuated
spring return, 4/2
One way trip actuatedspring return, 5/2
One way trip actuated air
reset 5/2
1
24
5 3
14 12
1
2 4
3
14 12
1
24
5 3
14 12
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Manually actuated valves
Push button actuated
spring return 2/2 Push button actuatedspring return 3/2
Push button actuated air
reset 3/2
NC NO
21012
1
12 210
1
2
13
12 10
1
2
3
12 10
1
2
3
12 102
13
12 10
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Manually actuated valves Push button actuated
spring return, 4/2
Push button actuatedspring return, 5/2
Push button actuated air
reset 5/2
1
24
5 3
14 12
1
2 4
3
14 12
1
24
5 3
14 12
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Manually actuated valves
Lever actuated spring
return 2/2 Lever actuated springreturn 3/2
Lever actuated air reset
3/2
NC NO
12
210
1
2
1312
10
1
2
312
10
210
12
1
1
2
312
10
12
2
13
10
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Manually actuated valves Lever actuated spring
return, 4/2
Lever actuated springreturn, 5/2
Lever actuated air reset
5/2 1
24
5 3
14
12
1
24
5 314
12
1
2 4
314
12
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Manually actuated valves Lever actuated lever
return, variable
throttling, 4/2
Lever actuated leverreturn, variable throttling,
detented, 4/2
Rotary knob actuated and
returned, variablethrottling, 4/2
14
2 4
1 3
12
14
2 4
1 3
12
2 4
12
1 3
14
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Manually actuated valves Lever actuated spring
to centre all ports
sealed
Lever actuated spring tocentre supply port sealed
Lever actuated spring to
centre supply to outlets
1
24
5 3
1
24
5 3
1
24
5 3
14 12
14 12
14 12
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Manually actuated valves
Lever actuated,
detented, all ports
sealed centre
Lever actuated, detented,supply port sealed centre
Lever actuated, detented,
supply to outlets centre 1
24
5 3
14
12
1
24
5 3
14
12
1
24
5 3
14
12
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Manually actuated valvesNC NO Pedal actuated spring
return 3/2
Treadle actuated detented3/2
1
2
3
12
10
2
13
12
10
1
2
3
12 10
2
13
12 10
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Manually actuated valves
Pedal actuated spring
return, 4/2
Pedal actuated springreturn, 5/2
Treadle actuated detented
5/2
1
2 4
3
14 12
1
24
5 3
1412
1
24
5 3
1412
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Manually actuated valves
Treadle actuated
spring to centre all
ports sealed Treadle actuated spring to
centre supply port sealed1
24
5 3
14 12
1
24
5 3
14 12
ll d l
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Manually actuated valves
Treadle actuated,
detented, all ports
sealed centre Treadle actuated,
detented, supply port
sealed centre1
24
5 3
1
24
5 3
14
12
14
12
ll d l
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Manually actuated valves
Push button actuated
rotary manual return
3/2
Push button actuated key
return 3/2
Push actuated pull or air
returned 3/21
2
3
12 10
1
2
3
12 10 Push actuated pull
returned 3/2
1
2
3
12 10
1
2
3
12 10
S f l d l
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Safety related valves
Monitored dump
valve
1
2
3
1012
Emergency stop valve
Soft start valve
1
2
3
12
10
1
2
3
12 10
S i l l
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Special purpose valves Impulse generator
1
2
3
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End
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Symbol Library
Vacuum Equipment
V i t
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Vacuum equipment
Vacuum generator
Vacuum cups
Vacuum switch
pneumatic1
2
3
2
13
NONC
V i t
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Vacuum equipment
Vacuum switch
electric, normally
open and normally
closed
Vacuum transducer withanalog and switched
outputs npn
Vacuum transducer with
analog and switched
outputs pnp
V dc
Analog out
Switch out
0 V
+V dc supply (brown)
Analog out (white)
Switch out (black)
0 V (blue)Load
+V dc supply (brown)
Analog out (white)
Switch out (black)
0 V (blue)Load
V dc
Analog out
Switch out
0 V
V i t
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Vacuum equipment
Vacuum filter
Vacuum silencer
Vacuum gauge
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End
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End