Water ring vacuum pump prominent characteristics are widely used

Water ring vacuum pumps, water ring pumps for short, is a rough vacuum pump, vacuum pump is a kind, variable capacity pump. Initially used as a self-priming pump, then gradually used in petroleum, chemicals, machinery, mining, light industry, medicine and food, and many other industrial sectors. In many industrial production processes, such as the vacuum filtration, vacuum water, vacuum feeding, vacuum evaporation, concentrated in vacuo, the resurgence of vacuum and vacuum degassing, etc., the water ring pump is widely used. Due to the rapid development of application technology of vacuum, water ring vacuum pumps in the rough areas has been known to get attention. As the water ring pump gas is isothermal compression, it can be exhausting flammable, explosive gas, but can also dust extraction, water gas, therefore, increasing the water ring pump applications.
Water pump also has its drawbacks:
Inefficient, generally about 30%, preferably up to 50%.
Vacuum is low, not only because of restrictions on the structure, the more important is to limit the saturated vapor pressure of the working fluid by. Water as the working fluid, ultimate pressure can reach 2000 ~ 4000Pa. Oil is used as working fluid, up to 130Pa.
In short, the water ring pump gas is isothermal compression, it can be exhausting flammable and explosive gases. Since there is no exhaust valve and the friction surface, it can be pumped gas except with dust, gas condensate and gas-water mixture. With these outstanding features, despite its low efficiency, is still widely used.

Water ring pumps and other types of mechanical  vacuum pump has the following advantages:

Simple structure, less precision, easy to process.
Compact, high number of revolutions of the pump, and can be directly connected with the motor, no deceleration devices. Therefore, the structure of small size, you can obtain a large displacement, the area is also small.
The compressed gas is substantially isothermal, i.e. the compressed gas process temperature changes very little.
As the pump chamber no metal friction surface, unnecessary to lubricate the pump, and wear small. Seal between the rotating and stationary parts can be done directly from the seal.
Breathing evenly, smooth and reliable, simple operation, easy maintenance.