Roots water ring vacuum pump package unit

Summary:

JZJ2B series Roots water ring vacuum unit is composed of ZJ Roots vacuum pump as the main pump and 2BV or 2BE water ring vacuum pump or Roots water ring unit as the fore pump, It not only can suction the general gases, but also can suction the other gases that contain moisture or a small quantity of dust. Compared with the general mechanical vacuum pump, it is not easy to be polluted by oil, moisture and dust. And compared with general water ring vacuum pump, it has higher vacuum and bigger pumping speed when it works in the high vacuum.

Several types of the package units:

◆Roots pump+water ring vacuum pump:The function of the water ring vacuum pump is to form the pre-vacuum for the Roots pump. Presently, water ring vacuum pump 2BV,2BE1 with higher ultimate vacuum  degree are mostly used as fore pump.

◆Roots pump+Roots pump+water ring vacuum pump:When use one set of the Roots pump, especially connecting with the water ring vacuum pump, the limited vacuum of the whole unit is much lower with the restricted scope . But to use two sets of the Roots pumps in series and connect them with the water ring vacuum pump can improve the whole limited vacuum effectively.

◆Roots pump+Roots pump+Roots pump+water ring vacuum pump:If the two Roots pumps and the water ring vacuum pump unit still dose not satisfie the requirements of the vacuum , another Roots pump can be added. These series Roots units are used extensively in some high vacuum technics of the vacuum freezing or dry process.

Normally, to choose the water ring vacuum pump as the fore pump is better than to choose the others because the following reasons:

First, the water ring vacuum pump can pump plentiful coagulable steam. And this advantage is more obviously when use the gas-down and oil seal mechanical vacuum pump as the fore pump because it is poor in pumping the coagulable steam.

Secondly, to use the solvent as the operating liquid will make the oil bad. Sometimes, the system is not allowed the pollution.

Furthermore, to choose the package units, it is necessary to make the working vacuum five or ten times of the limited vacuum in order to achieve the best performance of the package units. i.e. working vacuum>=limited vacuum *(5~10).