Unit 6 Pneumatic Circuits.pdf contain 12

Pneumatic circuits

1. Chapter 6
Pneumatic Circuits

2. Pneumaticcircuitshavethefollowingfunctions
•Tocontroltheentryandexitofcompressedairin
thecylinders.
•Touseonevalvetocontrolanothervalve•Touseonevalvetocontrolanothervalve
•Tocontrolactuatorsoranyotherpneumatic
devices

3. Direct control SAC

4. INDIRECT CONTROL OF SINGLE
ACTING CYLINDER

5. Direct Control DAC

7. Speed Control Circuit for double
acting cylinder

8. Speed Control of Bidirectional air motor

9. Position Based Sequencing

10. Time Delay Circuit

11. Shuttle Valve circuit

12. AND valve/Twin Pressure valve circuit

13. Hydro Pneumatics
•Ahydropneumatictankcontainspressurizedair
andwater.
•Itdoesnothaveabladderandairisindirect•Itdoesnothaveabladderandairisindirect
contactwiththewater.
•Thecompressedairactsasacushionexertingor
absorbingpressure

14. Air Oil Reservoir

15. Air Oil Reservoir Control System

17. Low cost Automation

18. Positional Diagram

19. Door Operation System

20. Pneumatic Circuit Diagram

21. MAINTENANCE OF FLUID POWER
SYSTEMS
Commoncausesofhydraulicsystembreakdown:
•Cloggedordirtyoilfilters.
•Inadequatesupplyofoilinthereservoir.
Leakingseals.•Leakingseals.
•Looseinletlinesthatcausethepumptotakeinair.
•Incorrecttypeofoil.
•Excessiveoiltemperature.
•Excessiveoilpressure.

22. Common Problems
•Excessivenoise
•Excessiveheat
•Incorrectflow
Excessive flow
Low flowLow flow
•Incorrectpressure
•Faultyoperation
No movement
Slow movement
Erratic movement

23. General Safety Rules for Electricity and
Electronics
•Useapprovedtools,equipmentandprotectivedevices.
•Avoidwearingrings,braceletsandsimilarmealitemswhenworking
aroundexposedelectriccircuits.aroundexposedelectriccircuits.
•NeverassumethatacircuitisOFF.
•Keeptoolsandtestequipmentcleanandingoodworkingcondition
•Useprotectiveclothingandsafetyglasseswhenhandlinghigh
vacuumdevices
•Donotworkonequipmentbeforeknowingproperprocedures

24. Indistrial Fliud Power (17608) 24