JZJ2B series of roots liquid ring vacuum unit

First, product overview

The JZJ2B series Roots liquid ring vacuum unit is a pumping unit composed of ZJ type roots pump as the main pump, 2BV/2BE1 series water ring pump or roots water ring unit as the front stage pump. In addition to pumping out general gases, it can also suck gas containing water, organic solvents or a small amount of dust. Compared with the general mechanical vacuum pump, it is not afraid of oil pollution, not afraid of water gas and micro dust, but compared with the ordinary water ring vacuum pump, it has the characteristics of high vacuum and high pumping speed in high vacuum condition.

Due to the use of high efficiency and energy saving 2BV series water ring pump for the front stage pump, the JZJ2B series vacuum unit has higher efficiency, compact structure and no leakage than JZJ2S series (2BV pump is a mechanical seal design, different from 2SK series plate seal), corrosion resistance (2BV with stainless steel or aluminum bronze impeller), high protection grade Point.

The working liquid of the front stage pump of roots water ring vacuum unit uses water and organic solvents (such as methanol, ethanol, xylene, acetone and other organic solvents) or other liquids. The front pump is used as a closed circuit system, which greatly reduces the pollution to the environment and greatly improves the recovery of organic solvents. The ultimate vacuum degree is determined by the saturated vapor pressure of the working fluid.

two. Attention to the selection of roots unit

Understand that the gas is extracted, and the gas contains no condensable vapor, whether there is particle dust, whether it is corrosive or not. When selecting a vacuum pump, it is necessary to know the composition of the gas and select the corresponding pump for the selected gas. If gas contains steam, particles and corrosive gases, auxiliary equipment such as condenser and dust collector should be installed on the intake pipe of the pump.

The working pressure of Roots vacuum unit should meet the limit vacuum and working pressure requirements of vacuum equipment. For example, a vacuum drying process requires the working pressure of 10mmHg (absolute pressure). The ultimate pressure of the vacuum pump should be at least 2mmHg, preferably less than 1mmHg. Usually, the limit pressure of the pump is higher than that of the vacuum equipment.

The working point of the roots vacuum unit is chosen correctly. The normal working range of Roots vacuum unit is the maximum suction pressure limit pressure 5. Example: the normal operating range of JZJ2B150-2.1 roots water ring vacuum unit is: 6000Pa~125Pa, the working range is the main range of normal working pressure after the pump is opened, and the unit has the best efficiency within this working range.

Under the working pressure, the vacuum unit should be able to drain all the amount of gas generated in the process of vacuum equipment.