High Performance Roots Vacuum Pump

Roots vacuum pump with high performance is a kind of rotary varactor vacuum pump. It evolved from Roots blower. According to the different working range of Roots vacuum pump, it can be divided into low vacuum Roots pump with direct air discharge, medium vacuum Roots pump (also known as mechanical booster pump) and high vacuum multi-stage Roots pump.

Generally speaking, high-performance Roots vacuum pump has the following characteristics: large pumping speed in a wide pressure range; fast start-up, can work immediately; insensitive to dust and water vapor contained in the pumped gas; no lubrication of the rotor, no oil in the pump chamber; small vibration, better dynamic balance conditions of the rotor, with exhaust valve; small driving power, small mechanical friction loss; It occupies a small area and has low operation and maintenance costs.

High Performance Roots Vacuum Pump Structural Principle :

High-performance Roots vacuum pump has by-pass valve. The principle of pumping is the same as Roots vacuum pump. It also uses a pair of 8-type rotors to keep a certain gap in the pump shell and make the same speed reverse to produce the effect of suction and exhaust. The inlet and outlet of different ZJP series Roots vacuum pumps are connected, and a self-weight valve is installed vertically on the passage. Its function is that when the product of the pressure difference between the inlet and outlet and the effective area of the valve exceeds the self-weight of the valve head, the valve head automatically opens. This value is the maximum pressure difference for the reliable operation of the designed pump. Therefore, the valve is actually an overload automatic protection valve.

High-performance Roots vacuum pump can not be used alone. It needs to form a vacuum unit with water ring vacuum pump, reciprocating vacuum pump, rotary vane vacuum pump and dry vacuum pump to achieve high vacuum and high pumping speed. Roots pump is especially suitable for vacuum system with vacuum of 10-2000 PA and pumping speed of 70-5000L/S.

high performance Roots vacuum pump technical parameters :

Model ZJ-150 ZJ-300 ZJ-600 ZJ-1200
Pumping speed(L/s) 150 300 600 1200
Ultimate pressure
1stage piston pump as backing pump 5×10-2
2 stage piston pump as backing pump 1×10-1
Max. allowable diff. pressure(Pa) 8×103 5×103
Motor rotary speed(RPM) 3000
Suitable motor power(kW) 2.2 4 7.5 11
Flange size Inlet(mm) 100 150 200 250
outlet(mm) 100 150 200 200
Cooling water consumption(L/h) 120 150
Allowable temperature(℃) 100
Vacuum pump oil 100#
Weight(without motor)(kg) 195 250 760 860

High Performance Roots Vacuum Pump

ZJ Roots Vacuum Pump

High performance Roots vacuum pump features:

1. There is a large pumping rate in a wide pressure range. It acts as an “accelerator” on the front pump to raise its pumping speed and limit vacuum.

2. High-performance Roots vacuum pump has no friction, no lubrication, no oil in the pump chamber, and clean vacuum can be obtained.

3. Vertical flow of gas in the chamber of Roots vacuum pump with high performance is conducive to the removal of dust and condensate in the pumped gas.

4. The rotor of high performance Roots vacuum pump with perfect symmetry and precise dynamic balance runs smoothly and reliably.

5. Compact structure with vertical and horizontal exhaust ports, easy to install.

6. The mechanical friction loss is small, so the driving power is small.

7. Easy to maintain and maintain, low cost and long life.

8. Low vibration and noise.

9. Removable condensable gases

10. Eliminate Oil Leakage and Emulsification – Application of Shaft Extension Seal and Composite Seal Structure Design of Imported Oil Seal.

11. High performance Roots vacuum pump is safe and reliable. The pump itself is equipped with relief valve to protect itself automatically.


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