Working pressure: select the nominal pressure level of the valve according to the maximum working pressure of the system. operating temperature: consider the influence of medium temperature on valve materials and sealing performance. medium characteristics: including corrosiveness, viscosity, solid particles, etc. select the corresponding materials and structures. connection method: flange connection, threaded connection, welded connection, etc., which must be matched with the pipeline. operation requirements: select the driving mode according to the operating frequency, opening and closing speed, control mode, etc.
