Clover roots blower is a dual impeller synchronous compression machinery food packaging vacuum blower, each with two bearings clover type rotor supported by a pair of synchronous gears large blower, so that the relative position of the two rotors remain unchanged. Fans empty load test run: (1) a new installation or fan should be overhauled after the load test run; (2) an empty load operation is under the intake, the exhaust valve is fully open conditions put into operation; (3) no abnormal smell or smoke phenomenon and impact or friction sound, vibration radial bearing parts is not greater than 6.3mm / s; (4) the empty load running around 30min, if the situation is normal, you can put into operation with a load, such as found in mine is not operating properly send oxygen blower, immediately shut down for inspection, after the exclusion still make empty load operation. Roots blower in accordance with their different ways of working can be roughly divided into single-stage and two-stage of the points, only one compression stage blower, which we call single-stage blowers, and the two single-stage blowers series, continuous gas compressed twice what we call the two-stage blower fan. Divided by Transmission: direct connection with fans and blowers Union; divided by Cooling: air cooling fans, blowers and water-cooled counterflow cooling blowers; by structure type: Vertical blowers, blower horizontal, vertical shaft blowers, densely into blowers and other groups; press seal type points: labyrinth seals, piston ring seals, packing and mechanical seals and other various types of blowers. Large Roots blower, Zhucheng East Han Machinery Co., blower provided by Zhucheng East Han Machinery Co. Zhucheng East Han Machinery Co., Ltd. (www.dhlcfj.com) (www.dhlcfj.com) is an industry leader in Shandong Weifang, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Zhucheng East Han Machinery Co. led the staff warmly welcome all inquiries negotiations to create Zhucheng East Han Machinery Co., a better future.