JZJS型羅茨水環真空機組 ，是以羅茨真空泵為主泵，以水環式真空泵為前級泵， 通過電接點真空表實現機組自動啟閉，自動保護及整套機組的安全保護的真空獲得設備。

它除了具有一般羅茨五空泵機組的某些特點外，由于采用水環式五空泵作為前級泵，所以它特別適用于抽除含有較多水蒸氣及有—定腐蝕性氣體的工業流程中。例如干燥、脫水、蒸發、蒸餾、結晶等工藝。

由于水環式真空泵的極限真空遠比油封機械泵低，所以用水環式真空泵作前級泵的羅茨水環機組的極限真空比用油封機械城泵作前級泵的羅茨機械泵機組的極限真空要低。本型號三級機組的極限真空25Pa , 二級機組的極限真空小于400Pa，但這樣的真空度對于上述工業流程要求已經完全可以滿足了。

JZJS Roots Water Ring vacuum Unit 1s a vacuum acqu1s1t1on equipment  with Roots vacuum Pump as the main  pump and Water Ring Vacuum Pump as the front pump. It realizesautomatic start -up  and  shut-down  of  the unit, automatic protection and  safety protection of the whole unit by means of electric contact vacuum meter.

In addition to some characteristics of genera l Roots vacuum pump units, the water ring vacuum pump is used as the front pump, so it is especially suitable for industrial processes that contain more water vapor and corrosive gases. For example, drying, dehydration, evaporation, distillation, crystallization and other processes.

Because the limit vacuum of water-ring vacuum pump is much lower than that of oil-seal mechanicl pump, the limit vacuum of Roots water-ring unit using water- ring vacuum pump as the front pump is lower than that of Roots mechanical pump unit using oil-seal mechanical pump as the front pump. The limit vacuum of this type of three-stage unit is 25Pa, and that of the second- stage unit is less than 400Pa. However, such a vacuum degree can fully meet the requirements of the above-mentioned industrial process.