There are many types of vacuum pumps we produce, the most common ones are circulating water vacuum pump and rotary vane vacuum pump.The vacuum of these two pumps is different.Many customers don't know which one to choose when choosing a vacuum pump.Next, I will take a detailed comparison of these two products with SHZ-D circulating water vacuum pump and 2xz-2 rotary vane vacuum pump as examples.
The 2xz-2 rotary vane vacuum pump is generally an oil-sealed mechanical vacuum pump, and usually the gap between the rotary vane and the pump chamber is sealed with oil.The working principle is that the eccentrically mounted rotor in the pump is tangent to the stator fixing surface, and two or more rotating blades slide in the rotor slot and are in contact with the inner wall of the stator;The working medium of the SHZ-D circulating water vacuum pump is water, and the working water is discharged together with the compressed gas.At the same time, the water ring in the tank needs to be continuously replenished with new cold water to ensure the thickness and temperature of the water ring. The working speed of the pump plays a decisive role in the pumping amount, working efficiency and compression ratio.

It can be seen from the working principle that the rotary vane vacuum pump is an oil pump and the water circulating vacuum pump is a water pump. The rotational speeds of the two are different, which will affect the degree of vacuum.