compressor valves Flashcards
List 4 main components of a compressor valve?
Stop plate, valve seat, plate ring, spring
What does valve lift mean?
The amount of lift that a sealing element has directly affects compressor operation.
What happens if there is to much valve lift?
Too much valve lift wears the valves out prematurely.
What are 3advantage of synthetic sealing elements?
Lighter weight reducing wear, limited damage to other compressor components, reduce noise level.
What are the advantage of V shape sealing elements?
They provide an added advantage of better flow characteristics.
Which valve has the least restriction of flow?
The V shape.
What application are dampened disc valves suitable for?
For high speed
What are poppet valves a good choice?
When there is condensation or other liquids in the gas stream
What is one valve related cause of excessive rod loading?
Installing a discharge valve backwards our mixing up suction and discharge valves
Compressor valves are opened by the reciprocating action of the poison. True or false?
False.the pressure differential operates the valve.
List the 3 measurements that must be made on an overhauled channel valve?
End clearance, side clearance and lift.
The concentric ring valve has the lowest capacity of any of the valves because of the restricted passage true or false?
False. It is one of the most efficient
It is a common mistake to clean the valve before inspection of it? True or false?
True.
It is not necessary to loosen the locking cap nut and set screw on a vale cover prior to disassembly?True or false?
False. It must be loosen
List 3 methods to leak test a compressor valve?
Liquid leak test,pressure drop test, flow meter test
It is important to remove the valve cover bolts before loosening the centre screw? True or false?
False. Loosen the centre screw first.
Why is it good idea to bar over the compressor over at least 3 times prior to start up?
Too check for protruding valves assembly and clearances.
What is valve lift?
The distance between the sealing element moves from open to choose position.
What one way to distinguish between.suction and discharge valves before installing?
Suction valves always open away from the nut.and discharge valves always open towards the nut.
