Specifications

Lobe pump
1. High efficiency
2. Small size, large flow
3. Consume less power, self-pr

Lobe pump

Features 
1. There is a certain gas between the rotor and pump chamber, and between rotors. They do not contact with each other, and do not need oil lubrication. 
2. Rotor has a good geometric symmetry, and can improve the rotary speed so as to produce a compact large pumping rate pump. 3. Pump works with small vibration and large capacity, and the capacity utilization factor is around 0.5. 
4. In the pump chamber, there is no compression as the mechanical vacuum pump does, so it does not require an exhaust valve. For this reason, it can be used to pump the condensable vapors. 
5. It starts fast, and can achieve the ultimate vacuum in a short period. It has low power and low maintenance cost for operation. 
6. Roots pump owns a high pumping rate in a wide range of pressures (1000PA ~ 1PA). It is able to quickly exhaust the gases which are suddenly released of gas, and cover the shortage of low pumping rate of the diffusion pump and oil sealed mechanical pump under the pressure of (1000PA ~ 1PA). As a result, it is most suitable used as a booster pump. 

Applications 
ZJ series roots vacuum pump is a kind of rotary positive displacement pump, which must be used with a fore pump. It has a higher pumping rate in a wider pressure range, and not sensitive to the pumped gases which contain dust or water vapor. Therefore, it is widely used in the metallurgy, chemical industry, food, electronic coating and other industries.

Performance Parameters

 

Model	Ultimate Preesure		Pumping seed(L/S)	Inlet Dia(mm)	Outlet Dia(mm)	Max.Permiss Diff.Pressure		Pressure relief valve		Motor Power(kw)
	Pa	Torr				Pa	Torr	Pa	Torr
ZJP-1200B/ZJP-1200S	5x10-2	3.7x10-4	1200	250	200	-	-	2700	20	11/7.5