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Series ZJ Roots Vacuum Pumps
   
The series ZJ Roots vacuum pump is without overflow valve. The figure-of-eight rotors are counter-rotating at a constant speed inside the pump housing for suction and exhaust of gas. Two rotors are supported by two bearings and synchronized by a pair of gears, which ensure these two root ors in certain relative positions. They are near to one another and to the housing without actual contacting, so lubrication is unnecessary in the working housing. The carefully balance operating parts and high precision bevel wheels ensure the pump be operated stably and continuously under the condition of high-pressure difference. Dynamic seal parts use our patent technology and imported oil seals. The vibration of shaft at the shaft seals is controlled to less than 0.02mm against oil leaking. The series ZJ Roots vacuum pump is machined by CNC manufacturing center. "O" rings are used for sealing the pump body, two side covers and two end covers. All parts of pump have good compatibility, so the overhaul is very easy. One-inlet and three-outlet structural design of pump is convenient for users to install and use. The pump can't be operated in dividually and should be used in connection with backing vacuum pump. The screw pump, oil seal pump and water ring pump are all suitable as backing pump for Roots pump. The Roots pump can be used to pump a mass of condensable gases when it connected with screw pump or water ring pump.
 
Construction Scheme :

        1Pump housing
        2Rotor
        345Gas outlet
        6Gas inlet

 
 
Performance parameter:
   
Model
Ultimate Partial Pressure
(Pa)
Pumping Speed
(L/S)

maximum allowable pressure
(HPa)
Inlet Diam.
(mm)
Outlet Diam.(mm)
Motor Power
(kw)
Speed
(r/min)
Recommended Backing Pump
Cooling Water Consumptoin
(L/min)
Weight
(KG)
ZJ70
ZJC70
3x10-2
70 100 80 50 1.1 2825 2XZ-18
2H-15
4
-
75
80
ZJ150
ZJC150
150 80 100 100 2.2 2840 2X-30
2H-30B
5
-
175
180
ZJ300
ZJC300
300 60 150 150 4 2890 2H-70B 6
-
230
245
ZJ600
ZJC600
600 58 200 200 7.5 2900 2H-70B
2H-150
8 560
575
ZJ1200
ZJC1200
1200 53 250 200 11 2930 2H-150 10 750
800
ZJ1800
ZJC1800
1800 44 250 250 15 2930 2H150+2H150 12 1100
1150
ZJ2500
ZJC2500
2500 44 320 320 18.5 2930 ZJ600/H300 12 1350
1400
עC-Magnetic Drive Roots pump.
 

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