Pneumatics Final Flashcards
To be determined a fluid, what 3 things need to happen?
1) Take shape of container
2) Exert a pressure
3) Flow
Pressure can be created what 3 ways?
1) Height of a column of fluid
2) Force on confined fluid
3) Resistance to flow
What is pressure?
Force per unit area
F=
PxA
The ____ and _____ of compressed air makes it kinetic energy
Flow and pressure
Pneumatic systems are measured in ____?
Cubic feet per minute
Mechanical device consisting of a body and a moving part which connects and disconnects passages within a body
Basic pneumatic valve
Valves control what 3 things:
1) System pressure
2) Direction of flow
3) Rate of flow
When air is compressed _____ and _____ increase.
Temperature and pressure
Air flowing through a pipe in a period of time is?
Rate of flow
4 ways to control a DCV
1) Mechanically
2) Manually
3) Selenoid
4) Pilot
Body that has internal flow passages that controls the direction of flow with moveable parts
Directional control valve
What 5 characteristics describe a particular DCV
1) Positions
2) Ways
3) Control Operation
4) Return
5) Normally passing/ Normally non passing
Senses and controls tank pressure
Pressure switch
A valve dedicated to regulate tank pressure in the case of a system failure
Safety relief valve
Controls pressure of stored energy to a leg of a circuit
Pressure regulator
3 common centering positions
1) Pressure
2) Exhaust
3) Blocked
3 ways to retract a single acting cylinder
1) Pressure
2) Exhaust
3) Working Port
Adjustable orifice with bypass check is used to ____ and _____
Meter in and meter out
Component which allows flow in only one direction
Check valve
A common way to control the rate of flow is by using a ____
Needle valve
Device that goes around adjustable orifice to allow flow in one direction
Bypass check valve
Powering a double acting cylinder require what 3 things
1) Minimum 4 ways
2) 3 positions
3) block center
