For pneumatic ball valves with operating temperature lower than 260 (500F), non-metallic sealing rings can be used. When the working temperature is 538c (1000T), the most common sealing measure is to install a graphite seal ring into the metal retainer ring. This sealing structure is often used in the on-off operation of pipelines. Small high-temperature pneumatic ball valve is in on-off and throttling operation. Metal sealing rings are often used. The sealing ability of the metal sealing ring is the key to whether the pneumatic ball valve can be dumped in the high-temperature and high-pressure pipeline. Now it has been successfully solved by carefully processing the sealing groove and the surface of the ball. For corrosion resistance and abrasion resistance of materials, hard bench metal shall be coated to meet the requirements of valves with diameters of more than 2 inches. Valve body materials and pressure shall be subject to service temperature. Work pressure or both impose strict restrictions.

D341x ventilation butterfly valve installation dimension drawing Here you can learn the d341x ventilation butterfly valve installation dimension drawing and relevant dimension information