COMPRESSOR (TERMS) Flashcards
Compressor
machine used to increase the pressure of a gas by decreasing the volume
Reciprocating compressor
used in high pressure and low capacity
Centrifugal Compressor
used in low pressure and high capacity
Rotary Compressor
used in medium pressure and low capacity
Classification of air compressors
Reciprocating - has no. of stages for compression (single and multi stage) and no. of sides of piston in operation (single-acting or double acting)
Rotating - centrifugal
Types of compressors
- reciprocating compressors
- rotary compressors without liquid seals
- rotary compressors with liquid seal
- Centrifugal Compressors
- Axial Flow compressors
- Hydraulic Jet Compressors
- Vapor Jet Compressors
(definition)
Reciprocating compressor
Capacity: 5,000 to 10,000 ft3/min
piston displacement pressure: 1,000 atm
Vacuum down: 0.5 in. hg abs
(definition)
Rotary compressors without liquid seals
Capacity: 50,000 ft3/min
vacuum down: not less than15 in. hg
moderate pressure: 5 to 20 psi
(definition)
Rotary compressors with liquid seals
Capacity: 5,000 ft^3/min
Vacuum down: up to 28 in. hg
Positive pressure service: 75 psig
(definition)
Centrifugal compressors
Capacity: 500 to 10,000 ft3/min
delivery pressure: as high as 150 psi
10 to 15 stages are required
(definition)
Axial flow compressors
Capacity: 2,000 to 100,000 ft3/min
delivery pressure: 75 psi
20 or 25 stages
(definition)
Hydraulic Jet compressors
Capacity: 1,000 ft3/min at suction condition
vacuum pump service: 1 to 4 in. hg abs
(definition)
Vapor Jet Compressors
used for exhauster and blower service with steam as the usual actuating fluid
Applications
- use to run pneumatic machine such as pneumatic hammers, rock drills, air hoists, etc.
- internal/combustion engines
- use to supply air in mine tunnels
- industrial cleaning
- sand blasting
- use in the manufacture of plastics
