Reciprocating compressor Introduction to Compressor to deliver gas
- Slides: 13
Reciprocating compressor
Introduction to Compressor • "to deliver gas at a pressure higher than that originally existing". • The inlet pressure level can be any value from a deep vacuum to a high positive pressure. • The discharge pressure can range from sub atmospheric levels to high values in the tens of thousands of pounds per square inch.
COMPRESSORS
Mechanical Piston Reciprocating Compressor They are the oldest type of compressors. They have cylinders which are equipped with suction and delivery valves The displacing action of the piston & inlet valve. Discharge valve prevents the backflow of gas into the compressor from the discharge line during the next intake cycle. • They have higher maintainance costs and lower capacity than dynamic compressors • Single-stage compressors are generally used for pressures in the range of 70 psig to 100 psig. • Two-stage compressors are generally used for higher pressures in the range of 100 psig to 250 psig. • •
The Advantages and Disadvantages of Reciprocating compressors Advantages - Applicable for low flow rate of high pressure ratio Disadvantages -Maintenance cost is higher -Needs more space -Can’t used for dirty gasses.
Types of Mechanical Piston Compressor • Single acting • Double acting • Single stage • Multistage
Cylinder • Cylinders for compressors used in the process industries are separable from the frame.
Pistons and Piston Rods • It translate the energy from the crankshaft to the gas in the cylinder.
Valves • The compressor cylinder valves are of the spring-loaded and gasactuated.
Crankshaft • The crankshaft is drilled with passages to allow for pressure lubrication of the bearings and crosshead.
The References • Videos links: https: //www. youtube. com/watch? v=v. BF-Bobr 7 U 4 https: //www. youtube. com/watch? v=f. TDk. G 1 y 5 R 34 • The Readings : http: //apvgn. pt/wpcontent/uploads/compressor_handbook_hanlon. pdf http: //www. tech. plym. ac. uk/sme/THER 205 -web/recips. pdf
Thank you for your attention Any Question ? ? ?
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