ZJ Vacuum Pump

Vacuum Pump
    Overview:
  • 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.
      • Advantages:
  • 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.
    • 型号 ZJ(P)-30 ZJ(P)-70 ZJ(P)-150 ZJ(P)-300 ZJ(P)-600 ZJ(P)-1200 ZJ(P)-2500
    Model
    抽速(L/s) 39 70 150 300 600 1200 2500
    Suction rate
    极限压力(Pa) 5×10-2 5×10-2 5×10-2 5×10-2 5×10-2 5×10-2 5×10-2
    Limited pressure
    转速(r/min) 1420 2840 2880 1440 2900 2940 2940
    Rotating speed
    口径(mm) 进口Inlet 80 80 100 160 200 250 250
    Caliber 出口Outlet 50 50 100 100 160 200 200
    重量(kg)Weight 75 100 200 490 500 1200 1300
    配用电机功率(kW)Motor power 1.1 1.5 3 4 5.5 11 18.5
    噪音<dB Noise 78 78 81 82 84 85 87
    最大零流量压缩比 26 26 30 30 35 40 40
    Max. zero flow compression ratio
    最大允许压差Pa 8000 6000 6000 5000 4000 3000 3000
    Max. tolerant differential pressure