Circulating water multipurpose vacuum pump is the device with circulating water as working fluid, and it adopts jet technology to create negative pressure. According to the appearance is divided into desktop type and vertical type ( vertical type has larger capacity relatively). Desktop type also is divided into anti-corrosion type and stainless steel type, according to motor material. Transparent tank vacuum pump is available.

The pump adopts one modeling shell, small size on the basis of multi-purpose vacuum pump. It has small volume, light weight, beautiful appearance etc characters. Double-meter, double-tap pump and four-meter four-tap, double-side multi-purpose pumps is easy to do visual experiment for teachers as well as to turn off and on for students at any side.