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High Pressure Side Channel Blowers 2012-02-16

High pressure blowers are ideal for moving large volumes of air at low pressures or vacuums. Unlike positive displacement compressors & vacuum pumps, they pressurize air through a no positive displacement technique. Typical regenerative blower applications include sewage aeration, vacuum lifting, vacuum packaging, pneumatic conveying, concrete aeration, pond aeration, vacuum tables, drying, dust/smoke removal, air sparing, & chip removal.

High pressure blowers are oil less & have no complicated intake/exhaust valuing. Most can be mounted in any plane &, with dynamically balanced impellers, generate small vibration. Because they are no positive displacement compressor/vacuum pumps, they discharge air that is neat & pulsation free, which are important considerations for today's plant instruments & controls.

Regenerative blowers are sometimes called high pressure blowers or ring compressors, terms that refer to their physical construction. They can be direct or belt driven. In direct drives, the impeller is mounted on an electric motor shaft. The number, size, & angle of the blades on the impeller choose pneumatic performance as well as the relationship between the impeller & housing. Some blowers have flat performance curves while others have steep ones.

Of all air handling equipment, regenerative blowers are probably the least understood. However, when technique parameters fall within their range, they can be among the most cost-effective methods for moving air & producing pressure or vacuum.

Among the major benefits of a regenerative blower is its lack of maintenance & monitoring requirements. The impeller is the only moving part & is wear free & does not come in contact with the housing channels. Self-lubricated bearings are the only parts that wear.

The impeller spins within a housing with an inboard & outboard channel. It is from this configuration that the name side channel blower is drawn. As the impeller blades pass the inlet port, they draw air in. The impeller rotation pushes air outward & forward in to the channels. The air then returns to the base of the blade. As the impeller spins, the technique repeats. This regeneration gives the blower its pressure/vacuum capabilities.

The large majority of blower failures are caused by improper installation or operation. Regenerative Trans portable Blowers have close internal clearances between the impeller & housing. It is important to prevent foreign material from entering that space. Ingested debris wedging between the impeller & housing may cause the blower to lock up & lead to a catastrophic failure. A blower ought to always be equipped with an intake filter. A 10-micron size is usually adequate. Filters must be kept neat. A blocked filter will starve flow.

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