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ZJ/ZJP series roots vacuum pump
ZJ/ZJP series roots vacuum pump

Minimum Order: 0
Quality/Safety Certification: 0.00


The greatest advantage of roots vacuum pump is high exhaust speed under low inlet pressure.

    The greatest advantage of roots vacuum pump is high exhaust speed under low inlet pressure. However, the pump must be connected with a backing vacuum pump since the roots pump cannot work until the backing pump vaccumizes the pumped system to the allowed inlet pressure of the roots vacuum pump. Moreover, the roots vacuum pump cannot tolerate large pressure difference; otherwise, the pump will be damaged by overload and superheating. Therefore, a suitable backing pump and safety devices are indispensible for the roots vacuum pump.

    The backing pump can be vacuum pump like slide valve pump, rotary vane pump, water ring pump or oil ring pump. The water ring pump is ideal for gas with too much steam. The roots pump runs quietly owe to precision gears. The internal ZJP overflow valves allow the roots vacuum pump and backing pump to start synchronously in atmosphere, shortening exhaust time. The vibration is extremely low because of perfect dynamic balance generated by discharge flange and suction flange which meet international standards. High exhaust speed can be obtained in medium vacuum, thus running cost is lowered. The clearances between rotators and between the pump body and rotators are strictly controlled to avoid frictions between moving parts in the pump cavity. All the flange parts are sealed by O rings instead of flat organic silicon rubber, making maintenance more convenient. Service life of the pump is greatly prolonged by well-chosen bearings and satisfactory lubrication. No lubricant exists in the pump cavity to ensure the dryness.

Model

ZJ(P)-30

ZJ(P)-70

ZJ(P)-150

ZJ(P)-300

ZJ(P)-600

ZJ(P)-1200

ZJ(P)-2500

Suction rate (L/s)

39

70

150

300

600

1200

2500

Limited pressure (Pa)

5×10-2

5×10-2

5×10-2

5×10-2

5×10-2

5×10-2

5×10-2

Rotating speed (r/min)

1420

2840

2880

1440

2900

2940

2940

Caliber (mm)

Inlet

80

80

100

160

200

250

250

Outlet

50

50

100

100

160

200

200

Weight (kg)

75

100

200

490

500

1200

1300

Motor power (kW)

1.1

1.5

3

4

5.5

11

18.5

<dB Noise

78

78

81

82

84

85

87

Max. zero flow compression ratio

26

26

30

30

35

40

40

Max. tolerant differential pressure Pa

8000

6000

6000

5000

4000

3000

3000

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