1. Action sensitivity and reliability: The continuous optimization of throttle valve action and reliability is one of the special requirements of the valve.
2. Lifting force, torque and speed: In general, there are no strict requirements on the opening and closing speed of the valve, but some working conditions have special requirements on the opening and closing speed. For example, some valves need to be opened or closed quickly to prevent accidents, and some valves need to be closed slowly to prevent water hammer. This should be considered when selecting the valve type.
3. Flow medium: There will be a pressure loss after the medium flows through the valve, that is, the valve has a certain resistance to the flow of the medium. In order to overcome the resistance of the valve, the medium must consume a certain amount of energy, that is, the flow resistance coefficient.
4. Sealing performance: The sealing performance of the flanged ball valve refers to the ability of each sealing part of the valve to prevent medium leakage, and is an important technical performance index of the valve. The contact between the opening and closing parts and the two sealing surfaces of the valve seat, the cooperation between the packing and the valve stem and stuffing box, and the connection between the valve body and the bonnet. Therefore, the pneumatic flange ball valve should meet these requirements in the production process to ensure its performance and provide a reliable guarantee for people's production.
