Basics

1. Industrial Pneumatic Circuits
Dr. S.N.Teli
Professor, Mechanical Engineering,
Bharati Vidyapeeth College of Engineering, NaviMumbai
Email: shivanandteli75@gmail.com
1

2. Industrial Pneumatic Circuit
Que 1: Draw working of single acting cylinder pneumatic circuit.
OR
A Single acting cylinder is to clamp a component, when the push button is
activated the cylinder is to remain in the clamped position. If the push button is
released, the clamp is to retract.
2
1 3
3/2 Spring Return
Valve
Fig: Single acting cylinder using 3/2 DCV
Solution:
Dr. S.N.Teli 2

3. Industrial Pneumatic Circuit
Que 2: Draw working of double acting cylinder pneumatic circuit using 5/2DCV.
Fig: Double acting cylinder using 5/2 DCV
A double acting cylinder is to extend when a push button is operated. Upon
release of the push button the cylinder is to retract.
OR
4 2
5
1
3
5/2 Spring Return
Valve
Solution:
Dr. S.N.Teli
3

4. 4 2
5
1
3
2
1 3
2
1 3
5/2 Pilot operated Valve
3/2 Push button
3/2 Push button
Fig: Double acting cylinder using 5/2 Pilot operated DCV
Industrial Pneumatic Circuit
Que 3: Draw working of double acting cylinder pneumatic circuit using 5/2
DCV pilot operated valve.
Solution:
Dr. S.N.Teli 4

5. Fig: Meter-In Circuit and Meter Out Circuit
Industrial Pneumatic Circuit
Que 4: Draw Pneumatic flow control circuits.
Solution:
Dr. S.N.Teli 5

6. Fig: Pneumatic AND Logic Circuit
Industrial Pneumatic Circuit
Que 5: Draw Pneumatic AND logic circuit
Solution:
Dr. S.N.Teli
4 2
5
1
3
2
1 3
S1
2
1 3
S2
2
1 3
S3
Dual Pressure Valve
5/2 Pilot Operted Valve
3/2 Push Button
3/2 Push Button 3/2 Push Button
1 1
2
6

7. Fig: Pneumatic OR Logic Circuit
Industrial Pneumatic Circuit
Que 6: Draw Pneumatic OR logic circuit
Solution:
Dr. S.N.Teli
4 2
5
1
3
1 1
2
2
1 3
S1
2
1 3
S2
2
1 3
S3
Shuttle Valve
5/2 Pilot Operted Valve
3/2 Push Button
3/2 Push Button 3/2 Push Button
7

8. Fig: Quick exhaust pneumatic circuit
Industrial Pneumatic Circuit
Que 7: Draw quick exhaust pneumatic circuit.
Solution:
Dr. S.N.Teli
Quick-exhaust valves are used to
increase the piston speed of
cylinders. This enables lengthy
return times to be avoided,
particularly with single acting
cylinders. The principle of operation
is to allow the cylinder to retract at
its near maximum speed by reducing
the resistance to flow of the
exhausting air during motion of the
cylinder. To reduce resistance, the
air is expelled to atmosphere close
to the cylinder via a large orifice
opening.
8

9. Fig: A+A- Pneumatic Circuit
Industrial Pneumatic Circuit
Que 8: Draw pneumatic circuit for A+A-
Solution: S1 and S2 are pneumatic limit switches (Sensors)
Dr. S.N.Teli 9

10. Fig: A+(delay)A- Pneumatic Circuit
Industrial Pneumatic Circuit
Que 9: Draw pneumatic circuit for A+(delay)A-
Solution: S1 and S2 are pneumatic limit switches (Sensors)
Dr. S.N.Teli
On-delay
Timer
10

11. Industrial Pneumatic Circuit
Solution: S1,S2,S3 and S4 are pneumatic limit switches (Sensors)
Dr. S.N.Teli
.
Que 10: Draw a Pneumatic circuit for A+ B+ A-B- .
Fig: Pneumatic circuit for A+ B+ A-B-
11

12. Industrial Pneumatic Circuit
Dr. S.N.Teli
.
Que 11: Draw a Pneumatic circuit for B+A+B-A-
Fig: Pneumatic circuit for B+ A+ B-A-
Solution: S1,S2,S3 and S4 are pneumatic limit switches (Sensors)
4 2
5
1
3
S1 S2
4 2
5
1
32
1 3
S1
2
1 3
S2
4 2
5
1
3
S3 S4
2
1 3
S4
2
1 3
S3
12

13. Industrial Pneumatic Circuit
Dr. S.N.Teli
.
Que 12: Draw a Pneumatic circuit for A+B+B-A-
Fig: Pneumatic circuit for A+ B+ B-A-
Solution: S1,S2,S3 and S4 are pneumatic limit switches (Sensors)
4 2
5
1
3
4 2
5
1
3
S1 S2
S3 S4
4 2
5
1
32
1 3
S1
2
1 3
S4
2
1 3
S3
2
1 3
S2
13

14. Industrial Pneumatic Circuit
Dr. S.N.Teli
.
Que 13: Draw a Pneumatic circuit for (AB)+B-A-
Fig: Pneumatic circuit for (AB)+B-A-
Solution: S1,S2,S3 and S4 are pneumatic limit switches (Sensors)
4 2
5
1
3
4 2
5
1
3
S1 S2
S3 S4
4 2
5
1
32
1 3
S1
2
1 3
S4
S 1
S 2
2
1 3
S3
14

15. Industrial Pneumatic Circuit
Dr. S.N.Teli
.
Que 14: Draw a Pneumatic circuit for (AB)+C+C-(AB)-
Fig: Pneumatic circuit for (AB)+C+C-(AB)-
Solution: S1,S2,S3 and S4 are pneumatic limit switches (Sensors)
15
4 2
5
1
32
1 3
S1
2
1 3
S6
4 2
5
1
3
4 2
5
1
3
4 2
5
1
3
2
1 3
S4
S1 S2
S3 S4
S5 S6
2
1 3
S5

16. Industrial Pneumatic Circuit
Dr. S.N.Teli
.
Que 15: Draw a Pneumatic circuit for A+B+C+B-A-(delay)C-
Fig: Pneumatic circuit for A+B+C+B-A-(delay)C-
Solution: S1,S2,S3 and S4 are pneumatic limit switches (Sensors)
4 2
5
1
3
4 2
5
1
3
4 2
5
1
3
S1 S2
S3 S4 S5 S6
4 2
5
1
3
2
1 3
S2
2
1 3
S4
2
1 3
S5
2
1 3
S6
2
1 3
S3
2
1 3
S1
A + A - B + B -
On-Delay Timer
C + C -
16

17. Industrial Pneumatic Circuit
Dr. S.N.Teli
.
Que 16: Draw a Pneumatic circuit for 4(A+A-).
Fig: Pneumatic circuit 4(A+A-)
Solution: S1and S2 are pneumatic limit switches (Sensors)
4 2
5
1
3
2
1 3
S2
2
1 3
2
1 3
S1
2
1 3
4
12
10
2
1
S1 S2
Start push button &
Output of Counter
Resetting for Counter
Reset of Counter
Pulse to Counter
Air supply to Counter
A + A -
17

18. Industrial Pneumatic Circuit
Dr. S.N.Teli
.
Fig: Pneumatic Circuit
4 2
5
1
3
4 2
5
1
3
1 1
2
1 1
2
2
1 3
2
1 3
2
1 3
Que 17: Draw a Pneumatic circuit for
•When S1 push button is press ,then first cylinder piston should extend
•When S2 push button is press, then both cylinders piston should be extend
•When S3 push button is press, both cylinder piston should retract
Solution:
18

19. Industrial Pneumatic Circuit
Dr. S.N.Teli
.
Que 18: Draw a Pneumatic circuit for A+B+C+A-B-C-
Fig: Pneumatic circuit for A+B+C+A-B-C-
Solution:
4 2
5
1
3
S5 S6
4 2
5
1
3
S2 S1
4 2
5
1
3
S4 S3
S1 S2 S3 S4
S5 S6
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20. Dr. S.N.Teli 20