Introduction To Pneumatics

Front 1

1. Explain the need for “pressure regulation” in a pneumatic system.

Back 1

A pressure regulator delivers a constant pressure air supply to its legs of a circuit and insures that the stored pressure energy of an air receiver is not unnecessarily wasted

Front 2

2. Identify the components of a pressure switch, safety relief valve, and pressure regulator.

Back 2

Pressure switch- consists of a spring, body, piston and inlet.

Safety relief valve - consists of a body, Inlet ,exhaust ,poppet , and spring

Pressure regulator - consists of a valve body, Inlet port, outlet port,piston, spring, and poppet

Front 3

3. Explain how a pressure switch, safety relief valve, and pressure regulator operate, within a pneumatic system, to control pressure.

Back 3

Pressure switch- a common way of sensing tank pressure and controlling actuation and deactuation in a small compressor

Safety relief valve - maximum pressure developed by a compressor is designed to be regulated by a control system which senses discharge or tank pressure

Pressure regulator - delivers a constant pressure air supply to its leg of a circuit and insures that the stored pressure energy of an air receiver is not unnecessarily wasted.

Front 4

4. Identify the pneumatic schematic symbols of a pressure switch, safety relief valve, and pressure regulator.

Back 4

Front 5

5. Describe the purpose and operation of a pneumatic double acting cylinder.

Back 5

Often used in a pneumatic system to achieve a reciprocating motion.

the double acting cylinder has a port at each end of the cylinder body by which air under pressure can enter or exhaust.this causes the piston rod to extend or retract.

Front 6

6. Identify the pneumatic schematic symbol of a double acting cylinder.

Back 6

Front 7

7. Identify the components of a directional control valve.

Back 7

Consists of a valve body with four internal flow passages and a moving part,a spool,which alternately connects a cylinder port to the supply pressure or to exhaust.

Front 8

8. Explain the need for “flow rate control” in a pneumatic system.

Back 8

8

Front 9

9. Identify the components of a needle valve.

Back 9

Consists of a valve body and an adjustable part, the adjustable part being a tapered nose rod.

Front 10

10. Explain how a needle valve affects air flow within a pneumatic system.

Back 10

Is positioned in a circuit so that it restricts air flow exhausting from an actuator port.the more the tapered nose rod is screwed towards it's seat in the valve body,the greater the restriction to free flow.

Front 11

11. Identify pneumatic schematic symbols relating to material covered in this unit . filter

Back 11

Front 12

11. Part 2

Identify pneumatic schematic symbols relating to material covered in this unit . Motor

Back 12

Front 13

11. Part 3

Identify pneumatic schematic symbols relating to material covered in this unit . Pressure gage

Back 13

Front 14

11. Part 4

Identify pneumatic schematic symbols relating to material covered in this unit . Flow control valve

Back 14

Front 15

11. Part 5

Identify pneumatic schematic symbols relating to material covered in this unit .compressor

Back 15

Front 16

11. Part 6

Identify pneumatic schematic symbols relating to material covered in this unit . Air receiver

Back 16

Front 17

11. Part 7

Identify pneumatic schematic symbols relating to material covered in this unit . Check valve

Back 17

Front 18

12. List the color code for the air pressures at various locations in a pneumatic system.

Back 18

Front 19

Secondary Port

Back 19

Located on a directional control valve

Front 20

Spring Bias

Back 20

increasing flow capacity.

Front 21

Manual Test Lever

Back 21

Found on an actuator and powered by hand

Front 22

Normally Non-passing (closed) Valve

Back 22

Normally Closed Valve: A valve that prevents the flow of air through it in the at-rest or unactuated condition.

Front 23

Outlet Port

Back 23

The air exits the filter through the outlet port

Front 24

Primary Port

Back 24

. Additionally the valve is used as a power valve for the supply of working air to the actuator.

Front 25

Safety Relief Valve

Back 25

A control system that senses discharge or tank pressure

Front 26

Inlet Port

Back 26

The air enters the filter through the inlet port

Front 27

Flow Rate

Back 27

The volume of air flowing through a pipe in a period of time is a rate of flow.

Front 28

Spool

Back 28

Is designed with "lands" that channel the flow through the valve to specific ports by shifting position the flow paths can be changed.

Front 29

Actuator Speed

Back 29

Is determined by how quickly the actuator can be filled and exhausted of air

Front 30

Directional Control Valve

Back 30

To change the direction of air flow to and from the cylinder.

Front 31

Cylinder Piston Rod

Back 31

. The element transmitting mechanical force and motion from the piston.

Front 32

Potential Energy

Back 32

is the energy that an object has due to its position in a force field or that a system has due to the configuration of its parts.

Front 33

Pressure Switch

Back 33

Pressure Switch: Controls the electric motor by sensing the pressure in the tank.

Front 34

Pressure Regulator

Back 34

Used to control the pressure of this stored energy to a leg of a circuit

Front 35

Flow Control Valve

Back 35

Operates by causing a restriction

Front 36

Prime Mover

Back 36

they are the primary source of mechanical energy or power. The mechanical energy produced by the prime mover is transmitted to another machine or mechanism, such as a pump or air compressor, to do some form of useful work.

Front 37

Needle Valve

Back 37

Affects the operation by causing a restriction.

Front 38

Exhaust

Back 38

Found on a valve body in a dcv

Front 39

CFM

Back 39

a measure of volumetric flow

Front 40

Poppet

Back 40

A component of a valve that seals or opens an internal passage across its full area to allow or prevent flow.

Front 41

Normally Passing (open) Valve

Back 41

permit flow from inlet port of valve to outlet port normally the flow will be cut by changing the position of the valve

Front 42

Double Acting Cylinder

Back 42

is a cylinder in which the working fluid acts alternately on both sides of the piston.