鼓风机

Pressure. A blower moves a large volume at under about one bar. A compressor moves a smaller volume at seven or more. Using a compressor for a blower duty is one of the more expensive mistakes in industrial utilities.

If you need volume rather than pressure (aeration, conveying, drying, bottle blow-off), it is a blower duty. If you need to drive a cylinder or a tool, it is compressed air.

Blowing and cooling with compressed air costs roughly eight times what a blower costs to do the same job. On a continuous drying line that difference is very large.

Typically 0.3 to 1.0 bar. Above that you are into low-pressure compressor territory and the selection changes.

Because they run continuously and aeration is usually the largest single consumer on a wastewater plant: often more than half the site total.

On aeration, yes. Demand changes hour by hour with the incoming load, and throttling a fixed-speed blower wastes most of the potential saving.

Very little on air-foil or magnetic bearing machines, no contact bearings, no gearbox on direct drive, no oil changes. Bearings are the only scheduled item.

On magnetic and air-foil bearing designs, yes. There is no lubricant anywhere in the air stream, which matters on food and packaging duties.

In most retrofits yes, on the same footprint and duct connections, and usually with a substantial energy reduction.

Typically under 80 dB(A) at one metre in a standard enclosure, which is considerably quieter than the lobe blowers they usually replace.