Compressed Air Systems
Card Set Information
Compressed Air Systems
Plumber 4th Period
The most common compressor is the ________ compressor.
The most common compressor is the _
belt driven type
Compressors that have diaphragms are ________ and are used ________.
Compressors that have diaphragms are _reciprocating_ and are used _in clean air applications_.
The tank used to store air is called a/an ________.
The tank used to store air is called a/an _
receiver or receiving tank
Compressed air may have impurities in it such as ________ , ________, and ________ .
Compressed air may have impurities in it such as _
_ , _
_, and _
Another name for a compressed air system is ________.
Another name for a compressed air system is _
a pneumatic system
What cools the air between stages of a two-stage compressor?
What does relative humidity tell us?
the water content of air
Multi-stage compressors usually have ________.
more than one cylinder
When air reaches 100% humidity, it is usually know as ________.
When air reaches 100% humidity, it is usually know as _
the dew point
Where are the air dryers installed?
downstream of the receiver tank
Pressure drop in a compressed air system should not exceed ________ psi.
Pressure drop in a compressed air system should not exceed _
What component is an air outlet installed with?
dirt pockets for automatic drains
Air receiver tanks should be equipped with _________.
Air receiver tanks should be equipped with _
a pressure switch, relief valve, drain, and pressure gauge
What are unloaders for compressors used for?
to decrease pressure in the cylinders prior to start up. (compressors are usually unloaded on start-up to reduce starting torque)
Most compressors are _________.
Most compressors are _
Materials used for compressed air systems are generally ________.
Materials used for compressed air systems are generally _
black iron and sometimes copper (types K and L)
Horizontal pipes downstream of the receiver should be ________.
Horizontal pipes downstream of the receiver should be _
graded to drain moisture away from the receiver
Pressure switches usually have a differential pressure of _________.
Pressure switches usually have a differential pressure of _
Pre-filters are installed at the ________.
Pre-filters are installed at the _
Piston-type compressors are also know as ________.
Piston-type compressors are also know as _
Aftercoolers are installed ________.
Aftercoolers are installed _
between the compressor and receiver
_. (aftercoolers bring the compressed air down to ambient temperatures before entering the receiver)