Roots water ring vacuum unit type

1. Roots pump + water ring pump:

The function of the water ring pump in the unit is to create the reserve vacuum needed by the Roots pump. Generally speaking, the limit vacuum of the single-stage water ring pump is not high, but the pre-vacuum required by the roots pump produced in our country is high, so the single-stage water ring pump is not actually used as the front-stage pump of the Roots pump, and the two-stage water ring pump which can improve the limit vacuum is used. As a front stage pump, the double stage water ring pump can also improve the limit vacuum of the unit.

2. Roots pump + roots pump + water ring pump:

The limit vacuum degree of a Roots pump is lower, especially when it is combined with a water ring pump, the use range is limited, and the limit vacuum degree of the whole unit may be lower. But if two Roots pumps are connected in series with a water ring pump, the limit vacuum degree of the unit can be greatly improved.

3. Roots pump + roots pump + roots pump + water ring pump:

If two Roots pump and water ring pump can not meet the vacuum requirement, one Roots pump can be added. This kind of Roots water ring vacuum unit has been widely used in vacuum freeze-drying and other high vacuum technology.dry-screw-vacuum-pump-vacuum-distillation-process