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Allows the compressor to continuously run eliminating the constant starting and stopping of the compressor. Cycles open as the pressure reaches the upper limits set for the discharge of the air compressor and cycles closed as the discharge or receiver pressure decrease.
Unloader or Unloader Valve
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State the three common types of air compressors
Three types of designs include reciprocating, rotary, and centrifugal air compressors.
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A system of connecting rods, crossheads, and a crankshaft and flywheel for transmitting the power developed by the driving unit to the air cylinder piston.
Reciprocating Compressors
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Adaptable to direct drive by induction motors or multicylinder gasoline or diesel engines.
The units are compact, relatively inexpensive, and require a minimum of operating attention and maintenance.
Rotary Compressor
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Originally built to handle only large volumes of low pressure gas and air (maximum of 40 psig), has been developed to enable it to move large volumes of gas with discharge pressures up to 3,500 psig
Centrifugal Compressor
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State the reason for using cooling systems in air compressors
Coolers are used to minimize the problems caused by heat and moisture in compressed air systems.
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State three hazards associated with pressurized air systems
- Small leaks or breaks in the compressed air system can cause minute particles to be
- blown at extremely high speeds
Compressors can make an exceptional amount of noise while running
Pressurized air can do the same type of damage as pressurized water
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Most common type of Air compressor at PTN
Screw Type
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