Schematic diagram of intelligent anti-corrosion pneumatic butterfly ball valve In addition, when the elbow is installed at the inlet side of the pneumatic butterfly valve, bias flow will be formed, resulting in an increase in torque. When the valve is in the middle opening, the operating mechanism needs to be self-locking due to the action of the hydrodynamic moment.
It is reported that the earthquakes of M4.2 and M3.3 (39.7 degrees north latitude and 118.8 degrees east longitude) occurred at 18:10 and 18:23 on September 14, 2015 in Changli County, Qinhuangdao City, Hebei Province, with focal depths of 14 km and 13 km respectively. At present, no report on casualties and wealth loss has been received.
