Assignment - Compressor #2 Flashcards

1
Q

4 components of a compressor valve are?

A
  • Seat
  • Guard
  • Sealing Element
  • Assembly Elements
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2
Q

Valve lift refers to:

A

Valve lift is defined as the distance the valve sealing elements move from closed to fully open.

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3
Q

Too much valve lift refers to:

A

Too high a lift will cause premature valve failure due to impact fatigue. Too low a lift will result in excessive gas velocity through the valve, high losses, and consequently inefficiency.

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4
Q

3 advantages to synthetic sealing elements:

A
  • lighter weight to reduce impact and ring and seat wear
  • limited damage to other compressor components in the event of a ring breakage
  • reduced noise level
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5
Q

Added advantages of a V shaped sealing element:

A
  • better flow
  • smoother flow path
  • less turbulence, does not get as dirty with its smoother surface
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6
Q

Wich valve has the least restriction to flow?

A

The ring valve allows for the least restriction to flow. Since there are no flow reducing webs, as found in the plate style valve.

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7
Q

Of the two valve, intake and exhaust. Which one generally needs to be replaced more often?

A

Exhaust valve due to high pressure @ discharge.

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8
Q

Dampened disc valves are suitable for _______ applications?

A

high speed

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9
Q

What are poppet valves a good choice?

A

Well suited to applications where there is condensate or other liquids in the gas stream.

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10
Q

What is a good practice when one spring in a set shows wear?

A

Replace the set

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11
Q

3 measurements on a channel valve

A
  • lift check
  • side clearance
  • end clearance
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12
Q

What is a common way in the field to check if a valve is sealing?

A

Field testing of valves often involves performing a simple liquid leak test of the valve. Fill the valve with WW fluid and observe the rate of flow.

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13
Q

1 cause of excessive rod load? (pertaining to valves)

A

Installing a discharge valve backwards or mixing up suction and discharge valves could cause excessive rod loading.

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