它除了具有一般羅茨真空泵機組的一些特點外，由于采用水環式真空泵作前級泵，因此，它特別適用于抽除含較多蒸氣及有一定腐蝕性氣體的工業流程中。例如：For example:制藥業的真空蒸餾、真空蒸發、脫水結晶；輕紡工業的滌綸切片干燥；食品工業的冷凍、干燥等工藝均可采用。

Besides having some features of general Roots vacuum pump, this unit treats two-stage water-ring vacuum pump as prepump, so it is specially suitable for industrial-process with a large quantity of vapor and some corrosive gases.The process such as vacuum distillation, vacuum evaporation, dehydration and crystallization in pharmacy, polyester chips drying in textile industry, freezing and drying in food industry could be adopted.

該機組是以普通羅茨真空泵為主泵，以雙級水環式真空泵為前級泵的自動啟閉，自動過載保護的成套真空獲得設備。

This unit is complete vacuum equipment which treats general Roots vacuum pump as the main pump, two-stage water-ring vacuum pump as prepump to achieve automatic open, close and overload protection.

常用真空泵bao括干式螺桿真空泵、水環泵、往復泵、滑閥泵、旋片泵、羅茨泵和擴散泵等，這些泵是我國國民經濟各行業應用真空工藝過程中必不可少的主力泵種。近年來，

伴隨著我國經濟持續高速發展，真空泵相關下游應用行業保持快速增長勢頭，同時在真空泵應用領域不斷拓展等因素的共同拉動下，我國真空泵行業實現了持續穩定地快速的發展。