Double Acting Air Compressor

Double act ing recip compressor are similar to single acting but they have inlet and discharge valves on both sides of the cylinder.

Double acting air compressor.

The compressor runs at 160rpm with average piston speed of 150 m min. The air compressor technology used most prevalently for this application is the double acting oil free water cooled reciprocating air compressor. Bottle blowing market is a strong niche market for the double acting oil free reciprocating piston compressors. Double acting recips are some of the most efficient compressors ever built but they re not as common as they used to be.

A single stage double acting air compressor of 150kw power takes air in at 16 bar delivers at 6 bar. In order to connect the piston in a double acting cylinder to an external mechanism such as a crank shaft a hole must be provided in one end of the cylinder for the piston rod and this is fitted with a gland or stuffing box to prevent escape of the working fluid. The double acting compressor compresses the air on both the up stroke and the down stroke of the piston doubling the capacity of a given cylinder size. This gives you two compression cycles for every turn of the crankshaft.

Piston speed 2ln 150m min. While at same time discharge stroke is in process at another end of the piston. In double acting air compressor air is admitted alternatively to both sides of the piston. A double acting cylinder is a cylinder in which the working fluid acts alternately on both sides of the piston.

When one side is performing the suction stroke the other side will be performing compression delivery of compressed air. With the higher pressures and air flows that are required the p e t. Power p 150kw. The compression follows the law pv 1 35 c.

This double compression cycle is what makes this type of air compressor very efficient. In other words a shock load equivalent to the discharge pressure will be transmitted to any piping or machine connected to the discharge piping and located within twenty eight feet of the compressor. When it is a double acting reciprocating air compressor suction stroke is in process at one end of the piston. Speed n 160rpm 160 6 0.

Determine the size of the cylinder. For a double acting piston design a compressor running at 1 200 rpm will generate a standing wave of 28 4 feet.