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JZJS Roots-Liquid Ring Vacuum Pump Package

JZJS roots vacuum set is made up of the series connected roots pump and liquid ring pump, where the roots pump is the main pump and the water ring pump is used as the backing pump.

JZJS roots vacuum set is made up of the series connected roots pump and liquid ring pump, where the roots pump is the main pump and the water ring pump is used as the backing pump.

It overcomes the ultimate pressure difference when using a single liquid ring pump (compared with the liquid ring pump, the ultimate pressure of the unit is greatly improved), and the low pumping rate under a certain pressure, at the same time, retaining the advantage of the fast work and higher pumping rate of the roots pump. In particular, it is adapt to pump a great amount of condensable vapors.

Roots water ring vacuum system includes the following types:

(1) Roots pump-water ring pump: The liquid ring pump in this unit is used to produce the fore vacuum required for the roots pump. Generally, the ultimate vacuum degree of the single-stage water ring vacuum pump is not high, and the roots pumps require higher ultimate vacuum degree, thus, the single-stage liquid ring pump is not usually used as the backing pump of the roots pump. The two-stage water ring pump with lower ultimate pressure can be applied as the backing pump, to reduce the ultimate pressure of the unit.
The ultimate pressure of one roots pump and one water ring pump is 400PA, which can meet the general needs of vacuum. If combine two series connected roots pumps and the water ring pump, the ultimate pressure can be greatly increased (up to 25PA). Therefore, for this type, the combination of two series connected roots pumps with a two-stage pump as the backing pump is common to compose the unit. If need a higher ultimate pressure, a combination of three roots pumps with a liquid ring pump can be used, which ultimate pressure can be up to t 1PA.

(2) If the three-stage roots liquid ring unit can not meet the ultimate pressure, the roots pump-water ring pump parallel mechanical vacuum pump can be adopted; This unit is mainly for a vacuumizing system which is used to treat a great amount of water vapor, and requires a long time and a very high ultimate vacuum degree, e. G, in the vacuum drying area.
In the vacuum system which is used to treat a great amount of water vapor, liquid ring pump is more appropriate choice. However, its ultimate vacuum degree is not high, as a result, the ultimate vacuum degree of the entire unit is lower (relatively).

Although in the vacuumizing system requiring higher vacuum degree, the mechanical vacuum pump of higher ultimate vacuum shall be used as the backing pump, the gas ballast mechanical vacuum pump and water-ring pump can be connected in series to act as the fore pump of the roots pump. In vacuum drying, first use the liquid ring pump for backing pumping until there is a significant reduction in water vapor, and then switch on the gas ballast mechanical vacuum pump, and switch off the water ring pump.

Roots pump-water ring pump system is widely used for the vacuum distillation, vacuum evaporation, dehydration and crystallization in the chemical industry; Freeze drying in the food industry; The vacuum drying in the pharmaceutical industry; The terylene section cutting in the light textile industry; The vacuumizing system in high-altitude simulation test, and so on.

Model Capacity
Pump System Total Power
Inlet (mm) Outlet
Main Pump  2nd Pump 1st Pump Backing
JZJS30-1 30 400 ZJ30

2SK-1.5 4.75 Φ50 Φ40 300
JZJS70-2 70 400 ZJ70

2SK-1.5 5.5 Φ80 Φ40 325
JZJS70-1 70 400 ZJ70

2SK-3 9 Φ80 Φ40 420
JZJS150-2 150 400 ZJ150A

2SK-3 10.5 Φ100 Φ40 525
JZJS150-2A 150 400 ZJ150A

SZ-250 14 Φ100 Φ100 610
JZJS150-1 150 400 ZJ150A

2SK-6 18 Φ100 Φ50 650
JZJS300-2 300 400 ZJ300

2SK-6 19 Φ150 Φ50 985
JZJS300-2A 300 400 ZJ300

SZ-360 19 Φ150 Φ100 1015
JZJS300-1 300 400 ZJ300

2SK-12 26 Φ150 Φ100 1485
JZJS600-2 600 400 ZJ600

2SK-12 29.5 Φ150 Φ100 1520
JZJS600-2A 600 400 ZJ600

2SK-20 44.5 Φ150 Φ125 2630
JZJS1200-2 1200 400 ZJ1200

2SK-30 66 Φ300 Φ125 4070
JZJS30-11 30 25 ZJ30
ZJ30 2SK-1.5 5.5 Φ50 Φ40 380
JZJS70-21 70 25 ZJ70
ZJ30 2SK-1.5 6.25 Φ80 Φ40 420
JZJS70-12 70 25 ZJ70
ZJ70 2SK-1.5 7 Φ80 Φ40 440
JZJS70-11 70 25 ZJ70
ZJ70 2SK-3 10.5 Φ80 Φ40 535
JZJS150-21 150 25 ZJ150A
ZJ70 2SK-3 12 Φ100 Φ40 600
JZJS150-12 150 25 ZJ150A
ZJ150A 2SK-3 13.5 Φ100 Φ40 710
JZJS150-11 150 25 ZJ150A
ZJ150A 2SK-6 21 Φ100 Φ50 920
JZJS300-22 300 25 ZJ300
ZJ150A  2SK-3 14.5 Φ150 Φ40 1150
JZJS300-21 300 25 ZJ300
ZJ150A 2SK-6 22 Φ150 Φ50 1350
JZJS300-12 300 25 ZJ300
ZJ150A 2SK-6 23 Φ150 Φ50 1510
JZJS300-11 300 25 ZJ300
ZJ300 2SK-12 30 Φ150 Φ100 1880
JZJS600-22 600 25 ZJ600
ZJ300 2SK-6 26.5 Φ150 Φ50 1665
JZJS600-21 600 25 ZJ600
ZJ300 2SK-12 33.5 Φ150 Φ100 1980
JZJS1200-22 1200 25 ZJ1200
ZJ300 2SK-12 40.5 Φ300 Φ100 3200
JZJS1200-22A 1200 25 ZJ1200
ZJ600 2SK-20 55.5 Φ300 Φ125 4270
JZJS1200-21 1200 25 ZJ1200
ZJ600 2SK-30 73.5 Φ300 Φ125 4670
JZJS30-111 30 1 ZJ30 ZJ30 ZJ30 2SK-1.5 6.25 Φ50 Φ40
JZJS70-211 70 1 ZJ70 ZJ30 ZJ30 2SK-1.5 7 Φ80 Φ40
JZJS150-211 150 1 ZJ150A ZJ70 ZJ70 2SK-3 13.5 Φ100 Φ40
JZJS300-411 300 1 ZJ300 ZJ70 ZJ70 2SK-3 14.5 Φ150 Φ40
JZJS300-221 300 1 ZJ300 ZJ150A ZJ70 2SK-3 16 Φ150 Φ40
JZJS300-211 300 1 ZJ300 ZJ150A ZJ150A 2SK-6 25 Φ150 Φ50
JZJS600-411 600 1 ZJ600 ZJ150A ZJ150A 2SK-6 28.5 Φ150 Φ50
JZJS600-221 600 1 ZJ600 ZJ300 ZJ150A 2SK-6 29.5 Φ150 Φ50
JZJS1200-221 1200 1 ZJ1200 ZJ600 ZJ300 2SK-12 44.5 Φ300 Φ100
JZJS2500-222 2500 1 ZJ2500 ZJ600 ZJ600 2SK-20 74 Φ300 Φ125

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