Article about Air Compressor Manufacturer 1) Reciprocating In-line Compressors: These are most commonly used compressors with varying pressure ranges. These are simple in design with almost very little automation. The cylinders of various stages are found in a straight line when seen from top. These compressors are commonly direct driven by electric motors or diesel engines. These compressors can generate medium volumes of air and low pressure. These are mainly used in small industries, Cleaning purpose, 2-wheeler garages, Spray paint units etc. 2) â€Vâ€-Shaped Compressors: These are usually air cooled compressors with finger valves / concentric valves mounted on each cylinder head unit. The compressor has different units displaced usually by 90 degrees, may or may not be connected to same crank pin on the crank shaft. Higher capacity compressors are water cooled. Better torque and balancing is achieved by displacing the units by certain angle. Usually â€V†shaped compressors are two stage and also available in multi stage for higher capacities. These also ensure better cooling and reduced maintenance. 3) Single-Acting Compressors: These are usually reciprocating compressors, which has piston working on air only in one direction. The other end of the piston is often free or open which does not perform any work. The air is compressed only on the top part of the piston. The bottom of the piston is open to crankcase and not utilized for the compression of air. 4) Double-Acting Compressors: These compressors are having two sets of suction/intake and delivery valves on both sides of the piston. As the piston moves up and down, both sides of the piston is utilized in compressing the air. The intake and delivery valves operate corresponding to the stroke of the compressor. The compressed air delivery is comparatively continuous when compared to a single-acting air compressor. Thus both sides of the pistons are effectively used in compressing the air. 5) Rotary Compressors: These compressors are not of reciprocating nature, therefore does not have any pistons and crankshaft. Instead, these compressors have screws, vanes, scrolls, and other devices which rotate and thus compress air. The rotary compressors are classified into screw type, vane type-lobe type, scroll type and other types. The screw compressors are efficient in low air pressure requirements. Two screws rotate intermeshing with each other, thus trapping air between the screws and the compressor casing, forming pockets which progressively travel and gets squeezed and delivering it at a higher pressure which opens the delivery valve. The compressed air delivery is continuous and quiet in operation than a reciprocating compressor. Screw compressors are more energy efficient than reciprocating air compressors but at the same time, less efficient from the maintenance perspective. 6) Vane Compressors The Vane type Air Compressor is having a fixed casing and a rotary rotor disc which has slots for holding the sliding plates as shown in the figure. As the rotor rotates, the disc also rotates, thus allowing the sliding plates to slide as the inner surface of the casing is eccentric. Thus the sliding plates moves away from the canter, huge quantities of air will be trapped in, thus as the plates converge, the air gets compressed and thus results in compressed air. 7) Scroll Compressors The Scroll type compressors are having scrolls driven by the prime mover. The scrolls outer edges trap air and then as they rotate, the air travel from outwards to inwards thus getting compressed due to the reduction in the area. Thus the compressed air is delivered through the central space of the scroll to the delivery air line. 8) Lobe Compressors The Lobe type air compressor is very simpler type with no complicated moving parts. There are single or twin lobes attached to the drive shaft driven by the prime mover. The lobes are displaced by 90 degrees. Thus if one of the lobes is in horizontal position, the other at that particular instant will be in vertical position. Thus the air gets trapped in between these lobes and as they rotate they get compressed and delivered to the delivery line. They generally have high air flow and less operating pressure. CM-14, GIDC, Estate Naroda, Ahmedabad - 382 330 INDIA Phone No. : +91-79-22819821Telefax :+ +91-79-2281 9820 Web Site: www.zenairtech.com E-mail: info@zenairtech.com
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