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Roots vacuum pumps model

Min.Order Quantity: 1 Set/Sets Roots vacuum pumps model

Supply Ability: 400~700 Set/Sets per Month Roots vacuum pumps model

Payment Terms: L/C,T/T,


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Construction features and working principle of the pump:

Model ZJ Mechanical Booster Pump, also known as a Roots pump, is a volumetric pump.

Roots vacuum pump employs a pair of rotors, identical and in 8-figure with certain clearance between them in the pump housing, rotating at the same speed in opposite directions to perform function of suction and discharge of gas. The two rotors are supported by rolling bearings in the end covers of the pump, rotating at high speed and are kept at a fixed relative position by a pair of timing gears. The end clearance between rotors and end covers are fixed by adjustable metal shims between the bearing housings and the end cover at the fixed end, which ensures one-direction expansion of the rotor when temperature rises during its operation.

Four sets of inner seals (also known as piston ring) in the two end covers prevent lube oil entering into the pump housing. The shaft seal at the front-end cover, also called as framework oil seal or shaft seal, prevents leakage of air into the pump housing.

In order to reduce temperature of the pump, all models of pumps (expect the two smallest models) are equipped with a gearbox cooler and front-end cover cooler.

ZJ roots pump EVP (3) e.png

Model Suction capacity         (L/S)

Limit vacuum

    (≤Pa) 

 Speed

  (rpm)

Motor Power

      (kw)

Inlet Dia.

   (mm)

Outlet Dia.

    (mm)

Weight

    (Kg)

Recommended backing pump       model
   ZJ-70          70      6x10-2   2780         1.5     80       50     87       2X-8
  ZJB-70      5x10-2     100
  ZJ-150A          150      6x10-2   2900          3     100      100     198       2X-15
  ZJB-150      5x10-2     215
  ZJ-300          300      6x10-2   1450          4     150      150     490       2X-30A
  ZJB-300      5x10-2     480
  ZJ-600          600      6x10-2   2900         5.5     150      150     490       2X-70A
  ZJB-600      5x10-2     503
  ZJ-1200A         1200      6x10-2   1450          11     300      300    1550       2X-70A           (2sets)
  ZJB-1200      5x10-2     250      250    1580

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