Pneumatic Circuits

Basics

1. Industrial Pneumatic Circuits
Dr. S.N.Teli
Professor, Mechanical Engineering,
BharatiVidyapeethCollege of Engineering, NaviMumbai
Email: [email protected]
1

2. Industrial Pneumatic Circuit
Que1: Draw working of single acting cylinder pneumatic circuit.
OR
ASingleactingcylinderistoclampacomponent,whenthepushbuttonis
activatedthecylinderistoremainintheclampedposition.Ifthepushbuttonis
released,theclampistoretract.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
Que2: 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.
OR4 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
Que3: 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
Que4: Draw Pneumatic flow control circuits.
Solution:
Dr. S.N.Teli
5

6. Fig: Pneumatic AND Logic Circuit
Industrial Pneumatic Circuit
Que5: Draw Pneumatic AND logic circuit
Solution:
Dr. S.N.Teli4 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
Que6: Draw Pneumatic OR logic circuit
Solution:
Dr. S.N.Teli4 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
Que7: Draw quick exhaust pneumatic circuit.
Solution:
Dr. S.N.Teli
Quick-exhaustvalvesareusedto
increasethepistonspeedof
cylinders.Thisenableslengthy
returntimestobeavoided,
particularlywithsingleacting
cylinders.Theprincipleofoperation
istoallowthecylindertoretractat
itsnearmaximumspeedbyreducing
theresistancetoflowofthe
exhaustingairduringmotionofthe
cylinder.Toreduceresistance,the
airisexpelledtoatmosphereclose
tothecylinderviaalargeorifice
opening.
8

9. Fig: A+A-Pneumatic Circuit
Industrial Pneumatic Circuit
Que8: 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
Que9: 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
.
Que10: 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
.
Que11: 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
.
Que12: 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
.
Que13: 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
S1
S2
2
1 3
S3
14

15. Industrial Pneumatic Circuit
Dr. S.N.Teli
.
Que14: 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)
154 2
5
1
3
2
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
.
Que15: 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
.
Que16: 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 Circuit4 2
5
1
3
4 2
5
1
3
1 1
2
1 1
2
2
1 3
2
1 3
2
1 3
Que17: 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
.
Que18: 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
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