Advantages of water ring vacuum pump:
1) The structure is simple, the manufacturing requirements are not high, there is no need for suction and exhaust valves, and the work is stable and the air volume is uniform.
2) The compression of the gas is close to isothermal compression, the temperature change during compression is small, there is no metal contact surface that rubs against each other in the pump, and combustion and explosion accidents are not easy to occur. outstanding superiority.
3) If the liquid ring adopts non-oil working medium, the pumped gas will not be polluted by oil. Also suitable for gases containing vapour, moisture or solid particles.
4) The rotating parts in the pump cavity and the fixed parts are sealed by liquid, and no lubrication is required, so the maintenance is simple, the operation is easy, and the work is reliable.

The main disadvantages of water ring vacuum pump:
1) Low efficiency. The efficiency of this kind of pump is generally 30-50%, the highest is only 55%, and the energy consumption is large.
2) The noise is large. The noise of larger water ring vacuum pumps is more than 95dB, exceeding the regulations of environmental protection regulations, and some even as high as 105dB, causing serious noise pollution.

These shortcomings of the water ring vacuum pump are more prominent today when energy is scarce and environmental protection requirements are strict, so it is necessary to seriously study the new vacuum pump that can be replaced.