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ZJ series Roots Vacuum Pumps

Download the brochure of ZJ series(pdf)

ZJ series Roots pump The Roots vacuum pump (i.e. Roots pump) is a kind of circumgyration and cubage transformable vacuum pump. Its working principle refers to the Roots pump's working principle.
The Roots vacuum pump's biggest advantage is having the higher suction capacity under the lower suction pressure. But it can't be used alone and must connect a fore pump together in series. While the pumped container's pressure that pumping by the fore pump firstly is close to the Roots pump's suction pressure, the Roots pump begins to work. In general, the high pressure difference is not permitted in Roots vacuum pump, or the pump will be damaged for over loading or over hot. So it is necessary to choose a suitable fore pump for Roots pump and connect the neseccary protected equipment.
The fore pumps are usually chosen the oil seal mechnical pump or liquid ring vacuum pump. Especially while pumping the gases that contains a great deal steam, the water ring vacuum pump is the ideal product being the fore pump.
The Technology Specifications
Model
ZJ-30
ZJ-70
ZJ-150
ZJ-300
ZJ-600
ZJ-1200
ZJ-2500
ZJ-5000
Suction Capacity(L/s)
30
70
150
300
600
1200
2500
5000

Limit vacuum(Pa)

5×10-2
5×10-2
5×10-2
5×10-2
5×10-2
5×10-2
5×10-2
<1×10-1
Rotary Speed(r/min)
2770
2870
2900
1450
2900
1450
2900
1800
DN(mm) Inlet
50
80
100
150
150
300
300
500
Outlet
40
50
100
150
150
300
300
350
Weight(kg)
75
100
215
480
503
1580
-
-
Motor Power(kW)
0.75
1.5
3
4
5.5
11
18.5
55

Appendix:
ZJ-30/70 Overall Dimensions
ZJ-150/300/600/1200 Overall Dimensions
ZJ-5000 Overall Dimensions


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