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25 Cards in this Set
- Front
- Back
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Single acting compress on _______ side of the piston. |
One |
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Trunk style Pistons are used in what type of compressor. |
Single acting compressor |
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Definition for Rod runout. |
Rod run out means the piston rod is not running totally straight through the packing |
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Rod reversal is necessary for what reason? |
This allows the oil to flood all around the pin. |
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Uncut writer rings are used in applications where they ___________ valve ports. |
Pass over |
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Why do we trammel the position of the piston rod relative to the crosshead? |
For reference of reassembly. |
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Rule of thumb for setting Pistons to head clearance. |
A. 2/3 Head end clearance B. 1/3 @ crank head clearance |
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On large reciprocating industrial compressors, this is by far the most common type of cooling |
Water |
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Keep the cooling water temperature at least ________ above The incoming gas temperature. |
5 to 10°C |
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What are three types of cylinder bores used in large compressors? |
A. Cast integral B. Dry liners C. What liners |
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What type of special rings would you need for oil free? |
Teflon |
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Why do we have clearance pockets on the compressors, and what and of the cylinder are they found? |
- it is necessary to provide some means of controlling the output to match demand.
- they are found in the head end head of the compressor cylinder. |
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Define VVCP |
Variable volume Clarence pocket |
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Top, middle, and bottom 90° to the crank and parallel to the crank. What are we doing? |
Measuring the bore diameter of the cylinder. |
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New cylinders are Hydro tested to what pressure? |
1 1/2 Times their working pressure. |
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When ever the cylinder has been honed or Deglazed, It should be washed with___________________. |
Hot soapy water |
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To ensure that the mainframe and distance piece is not supporting all of the cylinder and piping, the cylinder support is________________ to take some of the weight. |
Preload |
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Primary reason for keeping rod run out within limits? |
To keep the rod running true through the piston rod packing to Maximize seal and minimize wear. |
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What are some of the main cause of Rod runout ( 3 or more ) |
A . Worn crossheads or CrossHead guides
B. A twisted or settled mean frame
C. Improperly shimmed crossheads shimmed to high. |
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Which packing ring is used by itself, and where is it located? |
The pressure breaker is a single, radial cut, segmental ring found in the first cup on the cylinder side. |
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Which packing ring does the main sealing in a two ring set? |
Tangential cut ring |
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In a two ring set, which packing ring faces the pressure ? |
Radial cut. |
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Dots or letters on the the packing ring face forwards or away from the pressure ? |
Towards the pressure |
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Why are dowels used in packing ? |
To prevent joints from aligning. |
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Why do we use double acting ring combinations, and the arrangement would be ? |
The double acting combination seals pressure from either direction.
Two tangential |
