A vacuum pump works like a compressor that exchanges the role of the input side of the suction with the output side. Rather than using the output side for blowing, you use it to blow out air, creating a vacuum. Vacuum compressor pump systems use a simple operation principle to create build pressure differences in or der to achieve a certain purpose. It is possible to make a good vacuum pump out of an air compressor if you simply enclose the air intake and attach it to an appropriate fitting or hose.
Vacuum compressor pump systems are broadly categorized into three groups:
- Positive displacement vacuum pumps
- Momentum Transfer pumps
- Entrapment pumps
Positive displacement vacuum compressor pump systems use a mechanism that repeatedly expands a cavity, allowing gas to flow in y from the chamber, after which the cavity is sealed and the gas is exhausted to the atmosphere. Entrapment pumps aim at capturing gases in absorbed state or solid, while momentum transfer pumps use high speed rotating blades or speedy jets of dense fluids to knock out gas molecules off the chamber.
For low vacuum compressor pump systems, the positive displacement principle is highly efficient. However, when you want to achieve high vacuums, it would be best to combine momentum transfer pump with one or two positive displacement pumps. This is a special configuration where the positive displacement pump obtains a rough volume, before the momentum transfer pump creates a high vacuum. Ideally, momentum transfer pumps cannot start pumping at atmospheric pressure. The positive displacement pimp plays a critical role in backing up the momentum transfer pump by creating a low vacuum. If you want to achieve ultrahigh vacuums, you can add entrapment pumps into the configuration, although they need periodic regeneration of surfaces used for trapping vacuums
Global Vac offers vacuum compressor pump systems in a wide range of manufacturing tolerances, pressure, sealing material, admission or none admission of oil vapour, flow, reliability, service intervals, dust tolerance and resistance to vibration.