Zj-70 Roots Vacuum Pump for Chemical Industry

Zj-70 Roots Vacuum Pump for Chemical Industry

Pump description:

Model ZJ CZPT Booster Pump, also identified as a Roots pump, is a volumetric pump.
It employs a pair of rotors, equivalent and in 8-figure with specified clearance among them
in the pump housing, rotating at the same pace in reverse directions to execute
purpose of suction and discharge of gasoline. The two rotors are supported by rolling bearings
in the conclude covers of the pump, rotating at high speed and are retained at a
mounted relative situation by a pair of timing gears. The conclude clearance in between rotors and
finish addresses are fastened by adjustable metal shims among the bearing housings and the
stop include at the mounted conclude, which makes certain one particular-path expansion of the rotor when
temperature rises for the duration of its procedure.

4 sets of internal seals (also identified as piston ring) in the two finish addresses avoid lube oil
coming into into the pump housing. The shaft seal at the front-stop protect, also named as
framework oil seal or shaft seal, helps prevent leakage of air into the pump housing.

In get to decrease temperature of the pump, all versions of pumps (expect the two
smallest types) are outfitted with a gearbox cooler and entrance-finish go over cooler.

Electricity is transmitted through a coupling or V-belt from the motor to the driving shaft of
the pump and then through synchronizing gears to the driven shaft

Technical specs:


   Model Suction ability         (L/S)

Limit vacuum




Motor Electricity


Inlet Dia.


Outlet Dia.


Excess weight


Advisable backing pump(design)
   ZJ-70          70      6×10-two   2780         1.five     eighty      50      87       2X-eight
  ZJB-70      5×10-2      100
  ZJ-150A          150      6×10-2   2900          3     one hundred      100      198       2X-15
  ZJB-a hundred and fifty      5×10-2      215
  ZJ-300          300      6×10-2   1450          4     a hundred and fifty       one hundred fifty      490       2X-30A
  ZJB-three hundred      5×10-2      480
  ZJ-600          600      6×10-two   2900         five.5     a hundred and fifty       a hundred and fifty      490       2X-70A
  ZJB-600      5×10-2      503
  ZJ-1200A         1200      6×10-two    1450          11      300       300     1550       2X-70A            (2sets)
  ZJB-1200      5×10-2      250       250     1580

The main  advantage  of Roots  vacuum pump  is that  it can  operate  with high  pumping speed under  reduce suction  pressures, nevertheless,  has to  be backed by  a backing  pump.Under  typical functioning circumstances, it is  permissible to not add  by-go pipes.Roots vacuum pump must not function with a larger-pressure  distinction than allowable,otherwise  overheating   and   overload  will   cause  damage   of  Roots   vacuum  pump.
Therefore, correct backing pump and needed safety units need to be deemed.Oil sealed mechanical  pump is usually  chosen as   the fore   vacuum   pump.  Other   types   of backing   pumps   may   be   used   where    their requirement for greatest vacuum is not too  rigid. Particularly, when gas  pumped made up of large amount of  vapor, water-ring vacuum pump  maybe   an  ideal   option  though   ultimate  vacuum achieved is on the lower facet.

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Zj-70 Roots Vacuum Pump for Chemical Industry

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