空气、氮气与氧气增压机

It takes gas that is already compressed and pushes it higher: typically from a 7 bar plant network to 25 or 40 bar for blow moulding, testing or cylinder filling.

Because boosting from 7 bar takes a fraction of the power of compressing from atmosphere. If you already have plant air, a booster is much cheaper to run.

In this range, yes. There is no lubricant in the gas path, which matters for PET blowing, food gas and anything analytical.

Yes, the same machine family handles compressed air or nitrogen from a generator or a cylinder bank, the selection depends on the gas and the outlet pressure.

Yes, these are built for constant running rather than intermittent top-up. A booster used as a production machine has to be specified as one.

PET bottle blowing by a wide margin, followed by leak and pressure testing rigs and nitrogen boosting for laser cutting.

Typically 7 bar, and the machine is sized around that. Feeding it lower inlet pressure than specified reduces output and makes it work harder.

Reciprocating where the pressure ratio is high and the flow moderate. It handles ratios a rotary machine cannot. We select from your outlet pressure and required flow.

Yes, whatever reaches the booster is compressed further, so filtration and drying upstream matter more, not less.

Fixed speed with unloading, or variable speed where demand is intermittent, a blow moulding line changing bottle format through the day is the classic case for variable speed.