Pneumatic Symbols

Pneumatic Symbols
For system diagrams and component
identification
Contents
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Standards
B i symbols
Basic
b l
Functional elements
Flowlines
Connections
Conditioners and plant
Pressure regulators
Relief valves
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Actuators
V l symbol
Valve
b l structure
t
t
Valve functions
Three position valves
Operators
Port marking
Function components
Symbol Library
Click the section to advance directly to it
Graphic Symbols Standards
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Pneumatic symbols conform to and are devised
f
from
th International
the
I t
ti
l Standard
St d d ISO 1219
1219-1
1 1991
This covers graphical symbols for Fluid Power
Systems and Components
Port markings for fluid power valves are not
covered by the ISO standard. These are taken
f
from
th recommendations
the
d ti
off CETOP RP 68 P
CETOP
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Who is CETOP? CETOP is the abbreviation of Comité Européen des
Transmissions Oléohydrauliques
y
q
et Pneumatiques.
q
CETOP is the
European Fluid Power Committee.
Thus, it is:
· The communication platform for fluid power in Europe.
· The international umbrella organisation for national fluid power
associations in Europe.
Through the 18 national associations which are member of CETOP, all
well known companies in Europe belong to the European Committee.
Many of these companies are leading fluid power manufacturers and
major players in the international markets.
CETOP represents more than 1,000 companies - mainly manufacturers,
but also some dealers - with almost 70,000 employees and a market value
of abo
aboutt 13 billion EURO.
EURO These account
acco nt for a very
er high proportion of
companies active in these fields - 80-90% in most countries.
Basic Symbols
Shapes
z
These shapes and lines in the relative
proportions
ti
shown,
h
make
k up a sett off basic
b i
symbols from which fluid power symbols and
circuits are constructed
Basic Symbols (shapes)
z
Symbol sets can be drawn to any size but their
scale
l and
d relative
l ti proportions
ti
are determined
d t
i d by
b
a basic dimension of your choice “l”
Circles
l
energy conversion units
3/4
l
measuring instrument
1/3
l
mechanical link
1/3
l
roller
Basic Symbols (shapes)
l
Square
control component
connections
perpendicular to sides
l
Square at
45o
Rectangle
conditioning apparatus
connections to corners
>l
l
cylinders and valves
Basic Symbols (shapes)
1/4
l
l
Rectangles
continued
1/4
l
1/2
min 1
max 2
piston
l
cushion
l
l
1/2
l
1/2
l
certain control
methods, length
between limits to
suit
Basic Symbols
l
rotary actuator
actuator, motor
or pump with limited
angle of rotation
Semi circle
Semi-circle
2 l
Capsule
Double line
l
1/5 l
pressurised reservoir
air receiver, auxiliary
gas bottle
b ttl
mechanical connection
piston rod, lever, shaft
Basic Symbols
2
10
12
Line
Working line, pilot supply,
return, electrical
Dashed
Pilot control, bleed, filter
Chain
Enclosure of two or more
functions in one unit
Line
Electrical line
3
1
Functional Elements
Functional Elements
1/2 l
1/4 l
Triangle
Direction and nature of fluid,
open pneumatic or filled
hydraulic
Spring
size to suit
Arrow
1/3 l
Long
g sloping
p g indicates
adjustability
Functional Elements
Arrows
Straight or sloping
path and flow
direction, or motion
Tee
Closed path or port
Restriction
Size to suit
Functional Elements
Curved arrows
rotary motion
Shaft rotation
clockwise from right hand end
anti-clockwise from right hand end
both
Seating
g
90o angle
g
Functional Elements
Temperature
Indication or control
size to suit
Operator
Opposed solenoid
windings
g
Prime mover
M
Electric motor
M
Flowlines and Connections
Flowlines
Junction
Single
Junction
Four way junction
Crossing
not connected
Flexible
Fl
ibl
line
Hose usually connecting
parts with relative movement
Connections
Air bleed
Continuous
Temporary by probe
Air exhaust
No means of
connection
With means of
connection
Connections
Coupling quick
release
Both to exhaust
Coupling quick
release self sealing
Source sealed
Coupling
p g quick
q
release self sealing
Both sealed
Connections
Rotary connection one
line
Rotary connection two
lines
Rotary
y connection
three lines
Conditioners and Pressure
Producing Plant
Conditioners
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Water separator with
manual drain
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Water separator with
automatic drain
z
Filter with manual drain
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Filter with automatic drain
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Lubricator
Conditioners
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Dryer
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Cooler with and without
coolant flow lines
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Heater
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Combined heater / cooler
Plant
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Compressor and
electric motor
z
Air receiver
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Isolating valve
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Air inlet filter
M
Pressure Control
Pressure regulators
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A pressure regulator symbol represents a normal state with
the spring holding the regulator valve open to connect the
supply to the outlet.
The dotted line represents the feedback, this opposes the
spring and can vary the flow through the valve from full
flow, through shut off, to exhaust. The symbol is usually
drawn in only this one state. The flow path can be imagined
to hinge
g at the right
g hand end to first shut off the supply
pp y
then connect to the exhaust.
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Adjustable Regulator
simplified
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Adjustable Regulator with
pressure gauge
p
g g simplified
p
Filter Regulator Lubricator
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FRL Combined unit
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FRL Simplified symbol
Pressure relief valves
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A pressure relief valve symbol represents a normal state
with the spring holding the valve closed
closed.
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The dotted line represents feed-forward, this opposes the
spring and can be imagined to lift the flow path
path. When the
pressure reaches an excess value the flow path will line up
with the ports and flow air to relief.
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Adjustable relief valve
simplified
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Preset relief valve
p
simplified
Actuators
Actuators
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Cylinders symbols can be
any length over “l”
l
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The piston and rod can be
shown in the retracted,
extended or any
intermediate position
“l”
Single acting
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Single acting sprung
instroked
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Single acting sprung
outstroked
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Single acting sprung
instroked magnetic *
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Single acting sprung
outstroked magnetic *
* ISO 1219-1 provides no example for magnetic cylinders
Single acting without spring
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Single acting normally instroked
external force returns
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Single acting normally outstroked
external force returns
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Single acting normally instroked
magnetic external force returns
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Single acting normally outstroked
magnetic external force returns
Note: the hardware is usually double acting cylinders applied as single acting
Double acting
z
Double acting adjustable
cushions
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Double acting through
rod
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Double acting magnetic *
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Double acting rodless *
*
ISO 1219-1 provides no example for magnetic or rodless cylinders
Rotary actuators
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Semi rotary double
acting
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Rotary motor single
direction of rotation
z
Rotary motor bidirectional
Simplified cylinder symbols
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Single acting load returns
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Single acting spring
returns
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Double acting non
cushioned
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Double acting adjustable
cushions
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Double acting
g rod
through
Valve symbol structure
Valve symbol structure
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The function of a valve is given by a pair of
numerals
l separated
t d by
b a stroke,
t k e.g. 3/2..
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
t t the
th valve
l can achieve.
hi
Valve symbol structure
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A 3/2 valve therefore has 3 ports (normally these
are inlet,
i l t outlet
tl t and
d exhaust)
h
t) and
d 2 states
t t (the
(th
normal state and the operated state)
The boxes are two pictures of the same valve
operated
normal
Valve symbol structure
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A valve symbol shows the pictures for each of
th valve
the
l states
t t joined
j i d end
d to
t end
d
operated
normal
Valve symbol structure
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A valve symbol shows the pictures for each of
th valve
the
l states
t t joined
j i d end
d to
t end
d
operated
normal
Valve symbol structure
z
The port connections are shown to only one of
th diagrams
the
di
to
t indicate
i di t the
th prevailing
ili state
t t
normal
Valve symbol structure
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The operator for a particular state is illustrated
against
i t that
th t state
t t
Operated
p
state
produced by
pushing a button
Valve symbol structure
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The operator for a particular state is illustrated
against
i t that
th t state
t t
Operated
p
state
produced by
pushing a button
Normal state
produced by
a spring
Valve symbol structure
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The operator for a particular state is illustrated
against
i t that
th t state
t t
Operated
p
state
produced by
pushing a button
Normal state
produced by
a spring
Valve symbol structure
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The valve symbol can be visualised as moving to
align
li one state
t t or another
th with
ith the
th portt
connections
Valve symbol structure
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The valve symbol can be visualised as moving to
align
li one state
t t or another
th with
ith the
th portt
connections
Valve symbol structure
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The valve symbol can be visualised as moving to
align
li one state
t t or another
th with
ith the
th portt
connections
Valve symbol structure
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A 5/2 valve symbol is constructed in a similar
way. A picture
i t
off the
th valve
l flow
fl
paths
th for
f each
h off
the two states is shown by the two boxes. The 5
ports are normally
p
y an inlet, 2 outlets and 2
exhausts
Valve symbol structure
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The full symbol is then made by joining the two
b
boxes
and
d adding
ddi operators.
t
The
Th connections
ti
are shown against only the prevailing state
Valve symbol structure
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The full symbol is then made by joining the two
b
boxes
and
d adding
ddi operators.
t
The
Th connections
ti
are shown against only the prevailing state
Valve symbol structure
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The full symbol is then made by joining the two
b
boxes
and
d adding
ddi operators.
t
The
Th connections
ti
are shown against only the prevailing state
Valve symbol structure
z
The recommended spacing of the connections
1/4
1 /4
l
l 1/4 l
1
1/2
1/4
l
l
1/4
l
1/2
1/2
1/4
l
l
l 1/2 l
l
Valve symbol structure
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The boxes can be joined at either end but the
operator
t mustt be
b drawn
d
against
i t the
th state
t t that
th t it
produces. The boxes can also be flipped
A variety of symbol patterns are possible
normally
closed
normally
open
Valve symbol structure
z
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The boxes can be joined at either end but the
operator
t mustt be
b drawn
d
against
i t the
th state
t t that
th t it
produces. The boxes can also be flipped
A variety of symbol patterns can be produced
Reverse connected
Valve functions
Valve functions
Basic valves before
operators are added
Examples, push button operated
with spring return
Normal position
Function 2/2
Function 3/2
Valve functions
Basic valves before
operators are added
Examples, push button operated
with spring return
Operated position
Function 2/2
Function 3/2
Valve functions
Basic valves before
operators are added
Examples, push button operated
with spring return
Normal position
Function 4/2
Function 5/2
Valve functions
Basic valves before
operators are added
Examples, push button operated
with spring return
Operated position
Function 4/2
Function 5/2
Valve functions 5/3
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Three position valves have a normal central
position
iti that
th t is
i sett by
b springs
i
or with
ith a manuall
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, Supply to both outlets, exhausts sealed
Valves 5/3
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All valves types shown in the normal position
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Type 1. All ports sealed
z
Type 2. Outlets to exhaust
z
T
Type
3.
3 Supply
S
l to
t outlets
tl t
Valves 5/3
z
All valves types shown in the first operated position
z
Type 1. All ports sealed
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Type 2. Outlets to exhaust
z
T
Type
3.
3 Supply
S
l to
t outlets
tl t
Valves 5/3
z
All valves types shown in the normal position
z
Type 1. All ports sealed
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Type 2. Outlets to exhaust
z
T
Type
3.
3 Supply
S
l to
t outlets
tl t
Valves 5/3
z
All valves types shown in the second operated position
z
Type 1. All ports sealed
z
Type 2. Outlets to exhaust
z
T
Type
3.
3 Supply
S
l to
t outlets
tl t
Valves 5/3
z
All valves types shown in the normal position
z
Type 1. All ports sealed
z
Type 2. Outlets to exhaust
z
T
Type
3.
3 Supply
S
l to
t outlets
tl t
Operators
Operators
Manual
General manual
Lever
Push button
Pedal
Pull button
Treadle
Push/pull button
Rotary knob
Operators
Mechanical
Plunger
Pressure
Spring normally
as a return
Pilot pressure
Roller
Differential pressure
Uni-direction
or one way trip
Detent in 3 positions
Operators
Electrical
Solenoid
direct
Solenoid pilot
Solenoid pilot
with manual
override and
external pilot
supply
Solenoid pilot
with manual override
and integral pilot
supply
When no integral
or external pilot
supply is shown it
is assumed to be
integral
Port markings
Port Markings
To CETOP RP68P
2
12
10
3
1
2
4
14
10
1
4
12
1
2
12
2
14
12
3
1
5
3
Port Markings
To CETOP RP68P
2
12
10
3
1
2
4
14
10
1
4
12
1
2
12
2
14
12
3
1
5
3
Port Markings
To CETOP RP68P
2
12
10
3
1
2
4
14
10
1
4
12
1
2
12
2
14
12
3
1
5
3
Port Markings
To CETOP RP68P
2
12
10
3
1
2
4
14
10
1
4
12
1
2
12
2
14
12
3
1
5
3
Port Markings
To CETOP RP68P
2
12
10
3
1
2
10
1
4
14
4
12
1
2
12
2
14
3
12
1
5
3
Function components
Function components
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Non-return valve
simplified
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Flow regulator unidirectional
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Flow regulator bidirectional simplified
z
Two pressure ‘AND’
simplified
z
Shuttle valve ‘OR’
p
simplified
Note: The output can exhaust
back and is not trapped
Function components
z
Quick exhaust valve with
silencer simplified
z
Silencer
z
Pressure to electric
switch preset
z
Pressure to electric
switch adjustable
Symbol Library
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Actuators
z
Function Components
z
Solenoid Valves
z
Vacuum
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V l
Valves
z
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Air Line
Electrical and
electronic
Click the section arrow to go to it
Symbol Library
Actuators
Single acting cylinders
z
S
Sprung
in
i
z
Sprung out
z
Magnetic
sprung in
z
Magnetic
p
g out
sprung
z
Magnetic
M
ti
sprung in
non-rotating
rod
z
Magnetic
g
sprung out
non-rotating
rod
Single acting cylinders
z
Sprung in
S
i
adjustable cushion
z
Sprung out
adjustable cushion
z
Magnetic sprung in
adjustable cushion
z
Magnetic sprung out
j
cushion
adjustable
Single acting cylinders
z
Sprung in
S
i
adjustable cushion
non-rotating rod
z
Sprung out
adjustable cushion
non-rotating
g rod
z
Magnetic sprung in
adjustable cushion
non-rotating
t ti
rod
d
z
Magnetic sprung out
j
cushion
adjustable
non-rotating rod
Single acting bellows
z
Bellows
B
ll
single
i l
convolution
z
Bellows double
convolution
z
Bellows triple
convolution
Double acting cylinders
z
N
Non-magnetic
ti
z
Magnetic
M
ti
hydraulic
z
Non-magnetic
adjustable
cushioned
z
Magnetic
adjustable
cushioned
z
Non-magnetic
rod bellows
z
z
Magnetic
Magnetic
adjustable
cushioned
hi
d
rod bellows
Double acting cylinders
z
NonN
rotating rod
z
Magnetic
M
ti
nonrotating rod
z
Active
brake
z
Magnetic
active brake
z
Passive
brake
z
Magnetic
passive
b k
brake
z
Guided
rod
magnetic
Double acting cylinders
z
Non-magnetic
N
ti through
th
h
rod
z
Non-magnetic adjustable
cushioned through rod
z
Magnetic
through rod
z
Magnetic adjustable
cushioned through rod
Double acting cylinders
z
Three position
Th
iti
adjustable
dj t bl
cushions (equal strokes)
z
Three position adjustable
cushions magnetic (equal
strokes)
z
Four position adjustable
cushions (unequal
strokes))
z
Four position adjustable
cushions magnetic
(unequal strokes)
Other actuators
z
With electronic
l t
i analogue
l
output of piston position
z
Slide unit
z
Semi-rotary actuator
z
Rotary motor bi-directional
and non-reversible
Rodless cylinders
z
Cushioned
z
Cushioned
magnetic
z
Cushioned
passive
brake
z
Cushioned
magnetic
passive brake
p
z
Cushioned
active brake
z
Cushioned
magnetic
active brake
Rodless cylinders
z
Twin stroke
cushioned
z
Twin stroke
air through
carriage
z
Twin stroke
cushioned
magnetic
g
z
Twin stroke
air through
carriage
g
magnetic
Shock absorbers
z
Self
adjusting
z
Adjustable
End
Symbol Library
Air Line Equipment
Combination units
z
FRL with shut off valve
and pressure gauge
z
Lubro-control unit
z
Filter and lubricator
Combination units
z
Breathing air set
z
Filter regulator
z
Filter regulator with
gauge
Filters
z
Filter with manual drain
z
Filter with automatic drain
z
Filter with automatic drain
and pressure drop
indicator
Pressure regulators
z
Pre-set relieving
z
Pre-set relieving with
pressure gauge
z
Adjustable relieving
z
Adjustable relieving with
pressure gauge
Pressure regulators
z
Pilot operated
z
Pilot regulator with
independent feedback
z
Pilot operated regulator
controlled from pilot
regulator
g
Pressure regulators
z
Precision dual stage
(11-818)
2
z
Proportional pressure
valve
3
1
Lubricator
z
Lubricator
Pressure relief valves
z
Preset, no means of
connection to exhaust
z
Preset, tapped exhaust
port
z
Adjustable, no means of
connection to exhaust
z
Adjustable, tapped
exhaust port
z
Pil t operated
Pilot
t d
Other components
z
Silencer
z
Filter silencer
z
Water separator
automatic drain
End
Symbol Library
Electrical and Electronic
Sensors
Loads must be additionally suppressed
z
z
Reed switch 2 wire
Reed switch changeover
brown +V
blue
black
blue
Load
Load
Load
0V
0V
0V
brown +V
z
Reed switch 3 wire with led indicator
(emulating current sourcing pnp device)
z
Reed switch 3 wire with led indicator
(emulating current sinking npn device)
z
Reed switch 2 wire with led indicator
brown +V
blue 0V
Load
black
0V
blue 0V
brown +V
Load
black
+V
brown +V
blue
Load
0V
Sensors
Loads must be additionally suppressed
z
z
z
z
z
Solid state magnetic sensor pnp (current
sourcing)
pnp
Solid state magnetic sensor plug in
cable npn (current sinking)
Solid
S
lid state
t t magnetic
ti sensor with
ith pulse
l
extension
black
1
3
Solid state magnetic sensor plug in cable
pnp (current sourcing)
Solid state magnetic sensor npn
(current sinking)
brown +V
blue 0V
pnp
4
0V
brown +V
blue 0V
bl k
black
Load
0V
blue 0V
brown +V
npn
black
1
4
Load
+V
blue 0V
brown +V
3
npn
Load
black
Load
+V
brown +V
blue 0V
black
Load
0V
Sensors
Loads must be additionally suppressed
z
z
Reed switch 2 wire with led indicator and
plug in cable
Reed switch 2 wire with led indicator and
plug in cable
1
brown +V
4
black
Load
0V
1
+ brown
blue
Load
0V
Electrical Symbols
Electrical symbols
z
Direct current
( DC )
z
Line to earth
z
Alternating
current ( AC )
z
Line to chassis
z
AC or DC
z
Cell
z
Positive and
negative polarity
z
Battery
or
12 V
Electrical Components
Normally Normally
open
closed
Normally Normally
open
closed
z
Relay contact
z
General manual
switch contact
z
Push button
contact
z
Roller switch
contact
z
Pull button
contact
z
Delay to operate
z
Twist switch
contact
z
Delay to reset
Electrical Components
z
Relay coil
z
Relay coil delay to
operate contacts
z
Relay coil delay to
reset contacts
z
Solenoid valve
coil
Electrical Components
z
Proximity switch
z
Bell
z
Touch sensitive
switch
z
Buzzer
z
Pressure switch
z
Microphone
z
Supply and
return
z
Loudspeaker
P
24V
0V
Electronic Component Symbols
Electronic Components
z
z
Opto-isolator
Resistors
z
z
Windings
z
z
z
z
inductor
inductor with core
variable inductor
transformer
z
z
z
z
or
z
z
Capacitors
z
z
z
z
capacitor
polarised
capacitor
variable capacitor
pre-set capacitor
z
Resistor
Variable
Potentiometer
Pre set pot
Pre-set
Voltage
dependent
Light dependent
Diodes
z
z
z
diode
zener diode
light emitting diode
V
Electronic Components
z
Thyristor
z
Fuse
z
Triac
z
Wires connected
z
NPN Transistor
z
Wires crossing
z
PNP Transistor
z
Double junction
z
Photo-transistor
or
or
Electronic Components
z
Conductors
in a cable
z
Motors dc & ac
z
Conductors
twisted
z
Generator
z
Plug and socket
z
Lamp steady
& flashing
z
Coaxial plug and
socket
z
Operational
amplifier
z
Meters for
p , volts,,
amps,
ohms & watts
A
V
W
M
M
G
End
Symbol Library
Function Fittings and Components
Function fittings
2
z
Bl ki
Blocking
fitting
fitti
12
1
2
z
z
Pressure reducing
fitting
g
Pneumatic
P
ti sensor
fitting
1
1
2
Function components
z
Ai fuse
Air
f
z
Non return valve
z
Non return valve
Function components
z
bi-directional
bi
di
ti
l flow
fl
regulator
z
Exhaust flow
regulator with and
without silencer
z
Sil
Silencers
z
Shuttle valve ‘OR’
z
Two pressure valve
‘AND’ (will exhaust
either signal back)
Function components
z
Uni-directional
Uni
directional
flow regulator
z
Quick exhaust
valve with and
without silencer
z
Rotating joint
z
Pressure indicator
z
Pressure drop
indicator
Quick release couplings
made
z
Both to exhaust
z
Source sealed
z
Both sealed
released
End
Symbol Library
Solenoid Valves
Solenoid valves
with man override
on the solenoid
z
z
Direct solenoid actuated
spring return 2/2 NC
Direct solenoid actuated
spring return 3/2 NC
12
12
3
Directt solenoid
Di
l
id actuated
t t d
spring return 3/2 NO
12
2
10
2
10
12
2
10
1
2
10
12
z
2
10
3
1
3
12
1
2
10
3
1
Solenoid valves
with man override
on the solenoid
z
z
z
Pilot solenoid actuated
spring return 3/2 NC
Pilot solenoid actuated
spring return 3/2 NO
Pilott solenoid
Pil
l
id actuated
t t d
pilot solenoid return
2
10
12
3
12
3
3
1
1
2
10
12
1
2
10
3
12
1
2
10
12
2
10
3
1
2
10
12
3
1
Solenoid valves
4
z
Pilott solenoid
Pil
l
id actuated
t t d
spring return, 5/2
2
14
12
5
1 3
4
z
z
14
Pilot solenoid actuated
spring return and manual
override, 5/2
Pilot solenoid actuated
pilot solenoid return, 5/2
12
5
4
Pilot solenoid actuated
pilot solenoid return and
manual override, 5/2
1 3
2
14
12
5
1 3
4
z
2
14
5
2
12
1 3
Solenoid valves
Reverse piped
4
z
Pilott solenoid
Pil
l
id actuated
t t d
spring return, 5/2
2
14
12
5
1 3
4
z
z
14
Pilot solenoid actuated
spring return and manual
override, 5/2
Pilot solenoid actuated
and returned, 5/2
12
5
4
Pilot solenoid actuated
and returned with manual
overrides, 5/2
1 3
2
14
12
5
1 3
4
z
2
14
5
2
12
1 3
Solenoid valves
z
z
z
Double pilot solenoid
actuated spring to centre
all ports sealed reverse
piped
Priority pilot solenoid
actuated differential air
return, 3/2
Priority pilot solenoid
actuated differential air
return, 5/2
14
12
4 2
5
1 3
2
10
12
3
1
4
2
14
12
5
1 3
Solenoid valves
z
z
z
z
Priority pilot solenoid
actuated differential air
return, 3/2
2
10
12
3
1
4
Priority pilot solenoid
actuated
t t d differential
diff
ti l air
i
return, 5/2
Priority
yp
pilot solenoid
actuated air spring return,
3/2
Priority pilot solenoid
actuated air spring return,
5/2
2
14
12
5
1 3
4
2
2
10
12
3
1
14
12
5 1
3
Solenoid valves
4
z
z
Pilott solenoid
Pil
l
id actuated
t t d
spring return, manual
override, 5/2 with integral
flow regulators
14
Double pilot solenoid
actuated, manual
override,
id 5/2 with
ith integral
i t
l
flow regulators
14
2
12
5
4
5
1 3
2
12
1 3
Solenoid valves
14
z
z
z
Double pilot solenoid
actuated, spring to centre
all ports sealed, 5/3 with
integral flow
flo regulators
reg lators
Double pilot solenoid
actuated, spring to centre
supply
l port sealed,
l d 5/3
/3 with
ih
integral flow regulators
Double pilot solenoid
actuated, spring to centre
supply to outlets, 5/3 with
integral flow regulators
14
14
4
2
5
1 3
4
2
5
1 3
4
2
5
1 3
12
12
12
Proportional solenoid valves
z
z
4
2
5
1 3
Proportional flow to
electrical signal
Proportional pressure to
electrical signal
2
3
1
Safety related valves
12
z
2 10
Monitored dump valve
3
z
Soft start valve
1
2
12
10
3
1
End
Symbol Library
Valves
Valves un
un-tapped
tapped exhaust
z
z
z
z
z
z
Plunger actuated spring
return 3/2
Roller actuated spring
return 3/2
3
12
3
1
2
10
12
3
1
2
10
12
3
1
Rotary knob actuated
detented 3/2
Key actuated
detented 3/2
1
2
10
Push button actuated
spring return 3/2
Toggle actuated
detented 3/2
2
10
12
2
10
12
2
10
12
3
1
3
1
Valves integral bleed supply
z
z
z
z
z
Plunger / bleed actuated
air return 3/2
Roller / bleed actuated air
return 3/2
Antenna / bleed actuated
air return 3/2
3
2
10
12
1
3
1
One way trip / bleed
actuated air return 3/2
Low pressure / bleed
actuated air return 3/2
2
10
12
2
10
12
3
1
2
10
12
3
1
2
10
12
3
1
Valves external bleed supply
z
z
z
z
z
Plunger / bleed actuated
air return 3/2
Roller / bleed actuated air
return 3/2
Antenna / bleed actuated
air return 3/2
3
2
10
12
1
3
1
One way trip / bleed
actuated air return 3/2
Low pressure / bleed
actuated air return 3/2
2
10
12
2
10
12
3
2
10
12
1
3
1
2
10
12
3
1
Pilot actuated valves
NC
z
z
z
Pilot actuated spring
return 2/2
12
Pilot actuated spring
return 3/2
12
Double pilot actuated 3/2
12
2
10
Differential pilot actuated
3/2
12
2
10
1
1
2
10
3
3
3
1
3
10
1
2
10
12
1
2
12
2
10
12
1
2
10
3
z
NO
1
2
12
3
1
10
Pilot actuated valves
NC
z
z
z
z
Pressure or vacuum
actuated spring return
2/2 (diaphragm valve)
12
Low pressure pilot
actuated spring
return 3/2
12
Low pressure pilot
actuated pilot
return, 3/2
12
Low pressure pilot
actuated and
returned, 3/2
12
2
10
3
3
1
1
2
10
12
3
1
2
10
12
1
2
10
2
10
3
1
2
10
3
12
1
2
10
3
NO
3
1
2
10
12
3
1
Pilot actuated valves
z
z
z
Remote pressure
bleed actuated spring
return, NC, 3/2
12
Remote pressure
press re
bleed actuated spring
return, NO, 3/2
12
Remote pressure
bleed actuated spring
return,, 5/2
12
2
10
3
1
2
10
1
1
2
10
12
3
1
2
10
2
10
12
1
4
2
14
12
5
1 3
Pilot actuated valves
z
z
z
Pilot act
actuated
ated spring
return, 4/2
14
2
4
1
3
4
Pilot actuated spring
return, 5/2
Double pilot actuated 5/2
Differential pilot actuated
5/2
2
14
4
12
5
1 3
4
2
2
14
12
5
z
12
1 3
14
12
5
1 3
Pilot actuated valves
14
z
z
z
z
Pressure or vacuum
actuated spring return,
5/2 (diaphragm valve)
Low pressure pilot
actuated and
returned, 5/2
2
12
5
1 3
4
2
14
Low pressure pilot
actuated spring
return, 5/2
Low pressure pilot
actuated pilot
return, 5/2
4
12
5
4
14
1 3
2
12
5
1 3
4
14
2
12
5
1 3
Pilot actuated valves
z
z
z
Double pilot actuated
spring to centre all ports
sealed
Double pilot actuated
spring to centre supply
port sealed
l d
Double pilot actuated
spring to centre supply to
outlets
4
2
5
1 3
4
2
5
1 3
4
2
5
1 3
Mechanically actuated valves
NC
z
Plunger actuated spring
return 2/2
NO
2
10
12
12
2
10
1
z
z
Plunger actuated spring
return 3/2
12
Plunger actuated
Pl
t t d air
i resett
3/2
12
2
10
3
1
2
10
12
1
2
10
3
1
3
1
2
10
12
3
1
Mechanically actuated valves
z
Plunger actuated
Pl
t t d spring
i
return, 4/2
14
2
4
1
3
4
z
z
Plunger actuated spring
return, 5/2
Plunger
g actuated air reset
5/2
12
2
14
12
5
1 3
4
2
14
12
5
1 3
Mechanically actuated valves
NC
z
Roller actuated spring
return 2/2
NO
2
10
12
12
2
10
1
z
z
Roller actuated spring
return 3/2
12
Roller
R
ll actuated
t t d air
i resett
3/2
12
2
10
3
1
2
10
12
1
2
10
3
1
3
1
2
10
12
3
1
Mechanically actuated valves
z
Roller
R
ll actuated
t t d spring
i
return, 4/2
14
2
4
1
3
4
z
z
Roller actuated spring
return, 5/2
Roller actuated air reset
5/2
12
2
14
12
5
1 3
4
2
14
12
5
1 3
Mechanically actuated valves
NC
z
z
z
One way trip actuated
spring return 2/2
12
One way trip actuated
spring return 3/2
12
One way trip
O
t i actuated
t t d air
i
reset 3/2
12
NO
2
10
12
2
10
1
2
10
3
1
2
10
12
1
2
10
3
1
3
1
2
10
12
3
1
Mechanically actuated valves
z
One way trip
O
t i actuated
t t d
spring return, 4/2
14
2
4
1
3
4
z
z
One way trip actuated
spring return, 5/2
One way
y trip
p actuated air
reset 5/2
12
2
14
12
5
1 3
4
2
14
12
5
1 3
Manually actuated valves
NC
z
z
z
Push button actuated
spring return 2/2
12
Push button actuated
spring return 3/2
12
Push
P
h button
b tt
actuated
t t d air
i
reset 3/2
12
NO
2
10
12
2
10
1
2
10
3
1
2
10
12
1
2
10
3
1
3
1
2
10
12
3
1
Manually actuated valves
z
Push
P
h button
b tt
actuated
t t d
spring return, 4/2
14
2
4
1
3
4
z
z
Push button actuated
spring return, 5/2
Push button actuated air
reset 5/2
12
2
14
12
5
1 3
4
2
14
12
5
1 3
Manually actuated valves
NC
z
z
z
Lever actuated spring
return 2/2
Lever actuated spring
return 3/2
Lever actuated
L
t t d air
i resett
3/2
NO
2
10
2
10
12
12
1
1
2
10
2
10
12
12
3
1
3
2
10
12
1
2
10
12
3
1
3
1
Manually actuated valves
z
Lever actuated
L
t t d spring
i
return, 4/2
14
2
4
1
3
4
z
z
Lever actuated spring
return, 5/2
Lever actuated air reset
5/2
12
2
12
14
5
1 3
4
2
12
14
5
1 3
Manually actuated valves
2
z
z
z
Lever actuated
L
t t d lever
l
return, variable throttling,
4/2
Lever actuated lever
return, variable throttling,
d
detented,
d 4/2
Rotary
y knob actuated and
returned, variable
throttling, 4/2
4
12
14
1
3
2
4
12
14
1
3
2
4
14
12
1
3
Manually actuated valves
14
z
Lever actuated spring to
centre all ports sealed
4 2
5
14
z
Lever actuated spring to
centre supply port sealed
14
z
Lever actuated spring to
centre supply to outlets
1 3
4 2
5
12
1 3
4 2
5
12
1 3
12
Manually actuated valves
14
z
Lever actuated, detented,
all ports sealed centre
4 2
12
5
14
z
Lever actuated, detented,
supply port sealed centre
4 2
12
5
14
z
Lever actuated, detented,
supply to outlets centre
1 3
1 3
4 2
12
5
1 3
Manually actuated valves
NC
z
z
Pedal actuated spring
return 3/2
Treadle actuated detented
3/2
NO
2
12
3
10
1
2
12
10
3
1
2
12
3
10
1
2
10
12
3
1
Manually actuated valves
z
Pedal
P
d l actuated
t t d spring
i
return, 4/2
14
14
z
Pedal actuated spring
return, 5/2
14
z
Treadle actuated detented
5/2
2
4
1
3
4
12
2
12
5
1 3
4
2
12
5
1 3
Manually actuated valves
14
z
Treadle actuated spring
to centre all ports sealed
4 2
5
14
z
Treadle actuated spring to
centre supply port sealed
1 3
4 2
5
12
1 3
12
Manually actuated valves
4 2
14
z
Treadle actuated,
detented, all ports sealed
centre
12
5
4 2
14
z
Treadle actuated,
detented, supply port
sealed
l d centre
1 3
12
5
1 3
Manually actuated valves
z
z
z
z
Push
P
h button
b tt
actuated
t t d
rotary manual return 3/2
2
12
3
10
1
Push
P
h button
b tt
actuated
t t d key
k
return 3/2
Push
P
h actuated
t t d pull
ll
returned 3/2
Push actuated pull or air
returned 3/2
2
12
3
10
1
2
10
12
3
1
2
10
12
3
1
Safety related valves
12
z
2 10
Monitored dump valve
3
z
2
12
Emergency stop valve
3
z
Soft start valve
1
10
1
2
12
10
3
1
Special purpose valves
2
z
Impulse generator
3
1
End
Symbol Library
Vacuum Equipment
Vacuum equipment
z
Vacuum generator
z
Vacuum cups
NC
z
Vacuum switch
pneumatic
2
3
1
NO
3
2
1
Vacuum equipment
z
z
z
Vacuum switch electric,
normally open and
normally closed
Vacuum transducer with
analog and switched
outputs npn
Vacuum transducer with
analog and switched
outputs pnp
V dc
Analog out
Switch out
0V
+V dc supply (brown)
Analog out (white)
Switch out (black)
Load
0 V (blue)
V dc
Analog out
Switch out
0V
+V dc supply (brown)
Analog out (white)
Switch out (black)
Load
0 V (blue)
Vacuum equipment
z
Vacuum filter
z
Vacuum silencer
z
Vacuum gauge
End