• Roots Vacuum Pump
  • Roots Vacuum Pump
  • Roots Vacuum Pump

Roots Vacuum Pump


Main USES: Widely used in metallurgy, chemical industry, food electronics coating and other industries.

Payment Terms : L/C,T/T,

Product characteristics:
1. ZJP series Roots vacuum pumps are characterized by overload automatic protection, and their pumping performance is the same as ZJ type Roots vacuum pumps, i.e. they have higher pumping rate at lower inlet pressure, but because Roots vacuum pump is a dry gap sealing structure, in order to obtain some pumping rate and vacuum, it is also necessary to reduce the pressure of the front stage and reduce reflux, so there must be one in use. The front-stage vacuum pump is in series, and the Roots vacuum pump starts to work after the front-stage vacuum pump reaches the pressure.
2. The front stage vacuum pump of ZJP series Roots vacuum pump is generally oil seal mechanical pump, but if the vacuum requirement is not high, other forms of crude vacuum pump can be chosen as the front stage pump. Especially when the gas containing a lot of water vapor is pumped out, liquid ring vacuum pump is more suitable as the front stage pump, of course, all the achieved vacuum degree is lower.
Because the rotor is processed by high precision special numerical control machine tool and checked by fine balance, it has good geometric symmetry and uniform meshing clearance. The pump body and side cover are machined by special machine tools with high accuracy. Therefore, our Roots vacuum pump runs smoothly, has low noise, low vibration and high vacuum.
Because the transmission parts of the pump adopt reliable clearance elimination structure, the pump can work under high pressure difference for a long time.
Quick start, vacuum can be achieved in a short time.
Because there are no sliding parts in the pump chamber, oil lubrication is not needed to avoid the pollution of oil and steam to the system.
Stable and reliable, ZJP series itself with bypass valves play an automatic protection role.
The structure is compact and occupies a small area. Left, right and lower exhaust ports can be selected to facilitate user installation.

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odel ZJP- 70 ZJP- 150 ZJP- 300 ZJP- 600 ZJP- 1200 ZJP- 2500
Pumping speed(L/s) 70 150 300 600 1200 2500
Ultimate pressure
5×10-2 (1stage piston pump as backing pump)
1×10-1 (2 stage piston pump as backing pump)
Diff. pressure at overflow valve (Pa) 4×103 2. 7×103
Motor rotary speed(RPM) 3000
Suitable motor power(kW) 1.1 2.2 4 7.5 11 22
Flange size inlet(mm) 80 100 150 200 250 320
outlet(mm) 80 100 150 200 200 320
Cooling water consumption(L/h) 120 150 200
Allowable temperature(℃) 100
Vacuum pump oil 100#
Weight(without motor)(kg) 110 205 265 780 880 1350