Monday, March 18, 2013

Air Blowers - Operation & Maintenance Manual

Everest Twin Lobe Rotary Compressors/Blowers are positive displacement units, whose pumping capacity is determined by size, operating speed and pressure conditions. It employs two Twin Lobe impellers mounted on parallel shafts, rotating in opposite direction within a casing closed at the ends by side plates. As the impellers rotate, air is drawn into one side of the casing and forced out of the opposite side against the existing pressures. The differential pressure developed, therefore, depends upon the resistance of the connected system. The Blowers, being positive displacement type, do not develop pressure within the casing but the discharge pressure depends upon the system resistance / back pressure. Effective sealing of the compressor inlet area from the discharge area is accomplished by use of very small operational clearance, eliminating the need of any internal lubrication of the lobes. A pair of accurately machined alloy steel, hardened and ground timing gears maintain clearances between the impellers, during rotation. The air, thus delivered, is 100% OIL FREE

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Monday, March 4, 2013

Understanding lobe blowers - Root blowers

This Range covers various types of Centrifugal and Axial Flow Fans, which have relatively high air displacement but low compression ratios. They are either of Centrifugal type, Axial flow types or Regenerative types. As their internal clearances are relatively high, the discharge pressures are limited to few inches of water only. These types are generally used for applications requiring high volumes but low pressures such as in Air-conditioning, in furnaces, Low pressure Cooling, Dust or Fume extraction systems, lean phase pneumatic conveying etc.

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