Flashcards in Module 7 Deck (30):
a valve that controls system pressure by closing to reduce pressure to a safe operating level
A valve that opens at a preset pressure to exhaust air until pressure drops below the set level
a valve that gradually opens to discharge excess air as pressure increases above set level
pneumatic circuits that allow an actuator to operate only after a certain sequence of operations takes place
The pressure controls in a pneumatic system are used to _____ the air pressure.
The air pressure can be limited by starting and stopping the compressor, or by _____ either the intake or discharge valves.
During the time a compressor is being unloaded, it will not compress air because the valves are held _____.
Pressure-regulating valves are usually located at _____.
Outlet points or Air stations
Pressure-regulating valves regulate air at the _____ port.
The maximum pressure in a pneumatic system is controlled by a(n) _____ valve.
Pressure-relief valves are usually set to open at a point just _____ the system pressure setting.
A pressure-relief valve must be able to relieve more air that the _____ can supply.
Precision regulators were first "special" regulators, but now they are _____ with some manufactures.
The constant air bleed in a precision regulator prevents the diaphragm from _____.
The best way to regulate air pressure in an inaccessible location is with a(n) _____ regulator.
Pilot-controlled regulators require _____ pilot air.
The air pressure in a high-volume line can be regulated by the use of a(n) _____.
Pilot-controlled regulator or Booster relay
Regulating valves with relief capabilities are usually made to handle only _____ quantities of air.
Vented regulating valves have relief ports in either the valve body or the _____.
On air lines used to blow away dirt and chips, a special regulator that vents at a nozzle pressure of _____ psi is required.
The primary purpose of all of the pressure controls in a pneumatic system is to _____.
Limit air pressure
Which of the following types of relief valves provide the smoothest relief control?
a. Ball poppet
d. Spool poppet
What is the best location for a pressure-regulating valve in a pneumatic system?
At an air station
When diaphragm pressure-regulating valves operate, they _____.
Which of the following types of valves limit the compressed air to a safe maximum pressure in a pneumatic system?
Pilot-controlled regulators will not function without _____.
Regulated pilot air
Pressure-relief valves are usually adjusted to open at what pressure level?
Above the control valve setting
Which of the following types of valves is used to regulate a high-volume air line?
Initially, at what pressure does a relief valve open?