Water ring vacuum unit

Water ring pump unit can be widely used in vacuum distillation, vacuum evaporation, dehydration and crystallization in chemical industry; freeze-drying in food industry; vacuum drying in pharmaceutical industry; polyester chips in light textile industry; vacuum system in high altitude simulation test and so on.

The water ring vacuum unit is made up of roots pump and the water ring pump is connected to the front pump in series. It is more advantageous than other vacuum pumps to choose the water ring pump as the front stage pump for the water ring vacuum unit, because it not only overcomes the limit pressure difference (the limit pressure of the unit is much higher than the limit pressure of the water ring pump), but also has the disadvantage of low pumping rate under certain pressure, and at the same time retains it. The roots pump can work quickly and has the advantage of larger pumping rate. It can be adapted to remove a large number of condensable steam, especially when the gas-filled oil seal mechanical vacuum pump is not enough to remove condensable steam, or the use of solvents can deteriorate the performance of the pump oil, or the vacuum system does not allow oil pollution is more obvious. If equipped with explosion-proof motor and electrical appliances and comply with the corresponding safety rules, can also be able to extract flammable and explosive gases.

JZPS Roots-Liquid Ring Vacuum System

Technical parameters:

Water ring vacuum unit classification:

Water ring pump: the main function of water ring pump in the unit is to create the reserve vacuum needed by Roots pump. Generally speaking, the limit vacuum degree of single-stage water ring pump is not high. At present, the pre-vacuum required by Roots pump produced in our country is relatively high, so in fact, we do not use single-stage water ring pump as the front-stage pump of Roots pump. Instead, the two-stage water ring pump with lower limit pressure is used as the front-stage pump, which can also reduce the unit’s limit pressure.

The limit pressure of a pump and a water ring pump is 400 Pa, which can meet the general vacuum demand, but the range of its use will be limited. If two Roots pumps are connected in series with the water ring pump, the limit pressure of the unit can be greatly increased (up to 25 Pa). Therefore, in this type of pump is usually seen in series with two Roots pumps and then two-stage pump as the front pump unit. If a higher limit pressure is required, a combination of three Roots pumps and a water ring pump can be used, and the limit pressure can reach 1Pa.

If the three-stage water ring unit still can not meet the limit pressure, we can use water ring pump parallel mechanical vacuum pump. This unit is mainly used for a large amount of water vapor need to deal with a long time and extreme vacuum requirements are very high vacuum system, such as vacuum drying.

If a large amount of water vapor in the vacuum system, the use of water ring pump is more appropriate, but because its limit vacuum is not high, resulting in a lower limit vacuum of the entire unit. Although the mechanical vacuum pump with higher limit vacuum is needed as the front-stage pump in the vacuum system with higher vacuum requirement. The pneumatic mechanical vacuum pump and the water ring pump can be connected in parallel as the front pump of the pump. In vacuum drying, the water ring pump is pre-pumped until its water vapor is greatly reduced, then the pneumatic mechanical vacuum pump is started to cut off the water ring pump. If it takes a long time to complete the drying process, the required cooling water and power are relatively small.