There are various types of vacuum pumps. Among them, water ring vacuum pump and rotary vane vacuum pump are used more frequently. Many people are very complicated in their choice. If they mix the two, what is the difference between water ring vacuum pump and rotary vane vacuum pump?

The water ring vacuum pump is a kind of crude vacuum pump, which can obtain the limit vacuum of 2000 ~ 4000Pa. If the atmospheric radiation device is connected in series, it can reach 270 ~ 670pa. Water ring vacuum pump is widely used in industrial production, such as: vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum dilution, vacuum moisture regain and vacuum degassing. Since the gas contraction in the water ring pump is isothermal, flammable and explosive gas can be pumped out. In addition, the gas containing dust and water can also be removed. In general, excessive water is required to be filled in the pump body as the working fluid.

Rotary vane vacuum pump is a kind of mechanical vacuum pump with oil seal. Its working pressure scale is 101325 ~ 1.33 × 10-2 (PA), which belongs to low vacuum pump. Rotary vane vacuum pump can be used alone or as the front stage pump of other high vacuum pump or ultra-high vacuum pump. It is mainly used in metallurgy, machinery, electronics, chemical industry, light industry, petroleum and other production and scientific research departments. The rotary vane vacuum pump can be used to pump out the monotonous gas in the sealed container. If there is a gas ballast device, it can also be used to remove a certain amount of condensable gas. However, it should be noted that the rotary vane vacuum pump can not be used to remove the gases with high oxygen content, corrosive to metal, chemical reaction to pump oil and dust particles. Rotary vane pump is mostly small and medium-sized pump. Rotary vane pump has single-stage and double-stage.

After the introduction of the above contents, we can see that there are many differences between water ring vacuum pump and rotary vane vacuum pump. The most important thing is that the vacuum degree is different and the application scope is different. Before using, the wide range of users can choose the suitable vacuum pump products according to the practical needs.