该机组是以普通罗茨coinglass指数为主泵，以双级水环式coinglass指数为前级泵的自动启闭，自动过载保护的成套真空获得设备。
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. 

   它除了具有一般罗茨coinglass指数机组的一些特点外，由于采用水环式coinglass指数作前级泵，因此，它特别适用于抽除含较多蒸气

及有一定腐蚀性气体的工业流程中。例如：制药业的真空蒸馏、真空蒸发、脱水结晶；轻纺工业的涤纶切片干燥；食品工业

的冷冻、干燥等工艺均可采用。

Besides having some features of general Roots vacuum pump, this unit treats two-satege 

water-ring vacuum pump as prepump, so it is specially suitable for industrial-process 

with a large quantity of vapor and some corrosive gases.For example:The process such as

vacuum distillization, vacuum evaporation, dehydration and crystallization in pharmacy, 

polyester chips drying in textile industry, freezing and drying in food industry could be adpoted

主要性能指标：
型号
抽速
(L/S)
极限真空（Pa）
机组组成泵型号
配用功率（Kw）
进气口径（mm）
排气口径（mm）
主泵
中间泵
前级泵
JZJS-70·35
70
500
ZJ-70
 
2S-185A
7
80
50
JZJS-70·70·35
70
25
ZJ-70
ZJ-70
2S-185A
8.5
80
50
JZJS-150·70·35
150
25
ZJ-150A
ZJ-70
2S-185A
10
100
50
JZJS-150·70z·35
150
25
ZJ-150A
ZJ-70z
2S-185A
10.7
100
50
JZJS-300·200
300
500
ZJ-300
 
2SK-12
34
150
65
JZJS-300·150·70
300
25
ZJ-300
ZJ-150A
2S-230
18
150
50
JZJS-600·150·70
600
25
ZJ-600
ZJ-150A
2S-230
19.5
150
50
JZJS-600·300·200
600
25
ZJ-600
ZJ-300
2SK-12
39.5
150
65