PNEUMATIC COMPONENTS
Pneumatic symbols
A
PNEUMATIC ACTUATORS
single-acting cylinder
rod returned at rest
(SER)
double-acting cylinder
non cushioned
doubled-ended
piston rod cylinder
single-acting cylinder
rod out at rest (SES)
Double-acting cylinder
with adjustable
pneumatic cushioning
double-acting
rotatable cylinder
SOLENOID VALVES, CONTROL VALVES, PILOT VALVES
Direction of flow:
The arrow “
“ in the square shows
the direction of flow of the fluid.
Ports/positions:
The function of a valve (3/2, 4/2, 5/3 etc.)
is indicated by two figures:
- the first shows the number of ports,
(NB: pilot ports do not count)
- the second shows the number of valve
positions.
ex. : 3/2 =
: 5/3 =
Normally the pipework is shown connected to the square representing the
valve in its non-actuated position.
3 ports - 2 positions
5 ports - 3 positions
Connection of supply and exhaust ports:
The symbol for the solenoid or the pressureoperated valve has the same number of
squares as the valve has positions.
The right-hand square shows the valve
in its non-actuated (rest) position, the
left-hand square corresponds to a valve
in its actuated (work) position.
2 positions
3 positions
- connected to pressure supply
Pilot and return :
The method of valve actuation is indicated
by symbols added to the squares.
The pilot control is shown on the left-hand
sideand the return on the right-hand side.
Exemple:
pilot/control
direct
solenoid
valve
return
spring
Internal or external pressure supply
internal
external
- exhaust wich can be piped
- exhaust wich cannot be piped
Function:
- NC = normally closed (rest position)
- NO = normally open (rest position)
- U = universal (pressure supply to any
one of the ports)
PILOT/CONTROL AND RETURN SYMBOLS
00482GB-2009/R01
Availability, design and specifications are subject to change without notice. All rights reserved.
air
operated
solenoid pilot
operated
direct
solenoid
valve
solenoid
pneumatic
differential
+
+
+
+
manual operator
on control valve
(or position testor)
auxiliary
manual operator
on solenoid valve
manual operator
auxiliary
manual operator
on solenoid valve
spring
return
air operated
and spring
return (5/3)
solenoid
air operated and
spring return (5/3)
+
symbol for
manual operator
auxiliary
manual operator
on solenoid valve
- Ports numbers comply with standard ISO 5599 as follows
. Main ports:
2/2 - 3/2
1-2-3
1: Supply pressure (NC)
2: Outlet
3: Exhaust
4/2 - 5/2 - 5/3
1-2-3-4-5
1 : Supply pressure
2 - 4: Outlets
3 - 5: Exhausts
In solenoid valves 3/2 NO, pressure is usually in port 3, exhaust in port 1.
. A functional symbol of two figures describes pilot ports (12 - 14 or 10). It indicates which ports are activated by signal:
- signal 12: activates ports 1 and 2
- signal 14: activates ports 1 and 4
- signal 10: deactivates ports 1 and 2 (2/2 and 3/2 valves)
All leaflets are available on: www.asconumatics.eu
P025-1
Pneumatic symbols - PNEUMATIC COMPONENTS
EXAMPLES OF SYMBOLS IN THIS CATALOGUE ARE AS FOLLOWS
function
air operated
control
symbol
return
symbol
NF
-
-
Solenoid operated (1)
control
return
solenoid
spring
solenoid
spring
solenoid
spring
solenoid / air
spring
solenoid / air
solenoid / air
solenoid / air
spring
solenoid / air
spring
solenoid / air
spring
solenoid / air
air
differential
solenoid / air
air
solenoid / air
solenoid / air
differential
solenoid / air
solenoid / air
2 10
12
Direct operated
ports/positions
3 1
2 12
10
NO
-
-
3 1
2 10
12
U
-
-
3 1
3/2
2 10
Pilot operated
air
12
3 1
2
3 1
3 1
2 12
2
10
air
3 1
4 2 12
4 2 12
14
air
14
spring
3 1
3 1
4
2 12
4
14
air
14
4
2
5 1 3
4
14
12
air
2
5 1 3
12
5 1 3
4
14
air
14
2
differential
5 1 3
4
2 12
spring
5 1 3
14
12
spring
3 1
4/2
10
air
10
NO
10
2
12
air
12
10
spring
3 1
NF
5/2
2
12
NF
2
air
12
5 1 3
4
14
-
-
12
2
12
5 1 3
4
14
-
-
2
12
5 1 3
4
closed position (W1)
air operated
14
12
open position to pressure (W2)
air operated
14
12
14
12
open positon to exhaust (W3)
air operated
2
W1
14
5 1 3
4
5/3
2
W2
14
5 1 3
4
2
W3
14
5 1 3
4
2
12
closed position (W1)
solenoid operated
12
open position to pressure (W2)
solenoid operated
12
open position to exhaust (W3)
solenoid operated
5 1 3
4
2
5 1 3
4
2
5 1 3
(1) With manual operator on solenoid pilots.
MANUAL AND MECHANICAL OPERATED SOLENOID VALVES
function
symbol
commande musculaire
control
return
symbol
2
NF
pedal
4
plunger
spring
plunger
spring
2
manual
spring
3 1
4
2
-
spring
3 1
3 1
5/2 - 5/3
roller
spring
2
NO
return
2
3 1
3/2
mechanical control
control
lever
2
spring
5 1 3
5 1 3
AIR SERVICE EQUIPMENT
filter
regulator
lubricator
FRL unit
(simplified
diagram)
PNEUMATIC ACCESSORIES
one way
ajustable
restrictor valve
silencer
ajustable
restrictor valve
bi-directional
Quick
exhaust
valve
non-return
valve
3
1
1
3
shuttle valve
Adjustable
pressure
switch
2
3
P
1
indicator
2
PNEUMATIC LOGIC (following standard ISO 5784)
OR element
(sum)
1
2
1
AND element
(product)
1
2
&
3
3
YES element
(identity)
NOT element
(negation)
2
1
1
&
2
All leaflets are available on: www.asconumatics.eu
P025-2
1
3
program
sequencer
module
3
memory
relay
3
1
1
14
12
4 (X)
2
(X)
timer
3
1
single
pulse
generator
3
1
0,4
00482GB-2009/R01
Availability, design and specifications are subject to change without notice. All rights reserved.
ports/positions