Performance characteristics of roots pumps

Fast start, less power consumption, low operation and maintenance costs, large pumping speed, high efficiency, insensitive to a small amount of water vapor and dust contained in the pumped gas, large pumping rate in the pressure range of 100~1 Pa, can quickly eliminate the sudden release of gas. This pressure range is exactly between the oil-sealed mechanical vacuum pump and the diffusion pump. For this reason, it is often connected in series between a diffusion pump and an oil-sealed mechanical vacuum pump to increase the pumping capacity in the intermediate pressure range. At this time, it is also called a mechanical booster pump.