Roots pump (roots-type pump) is a non-compression vacuum inside, the compression ratio is usually very low, so the high vacuum pump required before the pump. Roots vacuum pump in addition to the limit depends on the structure and manufacturing precision pump itself, but also depends on the ultimate vacuum pump before. To improve the ultimate vacuum pumps, vacuum pumps can be used in tandem. Valve network of excellence, experts say, the working principle of the Roots blower pump similar. Due to the continuous rotation of the rotor, gas is drawn from the intake port into the space v0 between the rotor and the casing, and then is discharged through the exhaust port. Because after breathing v0 space is completely closed state, so there is no gas in the pump chamber compression and expansion. But when the top edge of the rotor turned vent, when v0 space communicates with the exhaust side, due to the high side of the exhaust gas pressure, then rushed back to some of the gas space v0 in order to enable gas pressure suddenly increased. As the rotor continues to rotate, the gas is discharged out of the pump. Roots pumps dry vacuum pump in the pump unit, there are two "8" shaped rotor mounted perpendicular to each other a pair of parallel shafts water ring vacuum pump, the transmission ratio of a pair of gears driven by a reversely to each other synchronous rotation movement. Between the rotor, between the rotor and the casing inner wall, maintaining a certain clearance, can achieve high speed operation. Water ring vacuum pump (referred to as the water pump) is a rough vacuum pump, it can get the ultimate vacuum of 2000 ~ 4000Pa, atmospheric jet series of up to 270 ~ 670Pa. The water ring pump is also used as a compressor pump unit, called water ring compressor, a low pressure part of the compressor, the pressure range of 1 ~ 2 × 105Pa gauge pressure. Dry claw vacuum pumps | Shwe Vacuum Equipment Co., Ltd. (certified) | vacuum provided by Zibo Vacuum Equipment Co., Than Shwe. Than Shwe Zibo Vacuum Equipment Co., Ltd. (www.zbdrzk.com) Shandong Zibo, vacuum leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Than Shwe Vacuum Equipment Co. in leadership with the staff warmly welcome all inquiries negotiations to create Shwe Vacuum Equipment Co., Ltd. a better future.