Review and summary

REVIEW AND SUMMARY

• A pneumatic circuit is defined as the graphic representation of the pneumatic components in a pneumatically operated machine.

• In this chapter, the design, operation, and purpose of the following pneumatic circuits have been presented:

I. Single-Actuator Circuits

1. Control of a single-acting pneumatic cylinder,

2. Control of a double-acting pneumatic cylinder,

(a) Direct control of a double-acting pneumatic cylinder,

(b) Air pilot control of a double-acting pneumatic cylinder, and

(c) Control of a double-acting pneumatic cylinder using shuttle valve.

3. Semi-automatic control of a double-acting pneumatic cylinder,

4. Automatic pneumatic cylinder reciprocating system,

5. Pneumatic cylinder sequencing circuit,

6. Speed control circuits (or throttling circuits),

(a) Meter-in speed control of pneumatic cylinder,

(b) Meter-out speed control of pneumatic cylinder, and

(c) Speed control of double-acting pneumatic cylinder with two flow control valves.

7. Actuation of pneumatic motor, and

8. Time delay circuit.

II. Multi-Actuator Circuits

Multi-cylinder pneumatic sequencing circuits for various industrial applications using cascade method.

• The cascade method is the simplest and easiest method of designing multi-cylinder pneumatic circuits.

KEY TERMS ONE SHOULD REMEMBER

Pneumatic circuits

Single-actuator circuits

Harris formula

Memory valve

Shuttle valve

Semi-automatic material handling circuit

Sequencing circuits

Speed control circuits

Throttling circuits

Meter-in circuit

Meter-out circuit

Time delay circuit

Automatic material handling circuit

Continuous reciprocation system

Multi-actuator circuits 

Cascade method