The pneumatically regulated ball valve is a rotary ball valve with a 90° angle, which can also be called a pneumatic O-type ball valve. It is composed of a pneumatic actuator with a quarter stroke and a ball valve. It is a specially designed and carefully manufactured product based on the introduction of foreign advanced technology. The pneumatically regulated ball valve adopts intelligent control and positioning, and it is matched with the electric valve positioner. It can control the operation by inputting 4~20mADC signal and 0.4~0.7MPa air source to realize the adjustment of pressure, flow, temperature and liquid level. Pneumatically regulated ball valves are powered by compressed air. The valve stem drives the valve core to rotate 90° in the valve body to achieve full-opening-closed action. Pneumatically regulated ball valves are classified into metal seals and soft seals according to their sealing properties. The pneumatic O-type regulating ball valve has the advantages of compact structure, small volume, reliable operation, good sealing performance, easy maintenance, convenient installation and strong adaptability. Pneumatically regulated ball valves are particularly suitable for applications where the media is viscous, particulate-containing, or fibrous. Pneumatically regulated ball valves are widely used in industrial automation control systems such as petroleum, chemical, teaching equipment, light industry, high-voltage equipment, pharmaceutical, papermaking, etc. for long-distance centralized control or local control
