Classification by cooling blower points: air cooling fans, blowers and water-cooled counterflow cooling blowers; by structure type: Vertical blowers, blower horizontal, vertical shaft blowers, blower intensive group; press seal type points: Maze sealing, piston ring seals, packing and mechanical seals, and other types of blowers. Roots blower test run for the new installation overhaul or blower must be unused for a long time commissioning. Concrete steps are as follows 1, under no-load condition jog power switch Check the motor rotation direction. Indicating the direction of rotation required cooling shroud fan cooling water valve should be open. 2, starts 30 minutes after the air operation to check for abnormal vibration and heat generation should be shut down if unusual circumstances pinpoint the cause. 3, no-load operation, no abnormal situation gradually close the vent valve reaches the rated pressure to observe the fan temperature and vibration current, voltage is normal. 4, the operation of the process on a regular basis to check the oil temperature, ammeter, bearing temperature is generally 15 minutes to check again. 5, shutdown must first relief, load shedding and then finally closed cooling water park. Roots blower fan applications _ Zhucheng East Han Machinery Co., Ltd. (Certified) _ blower provided by Zhucheng East Han Machinery Co. Zhucheng East Han Machinery Co., Ltd. (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.