Introduction of the Driving Mode of Sanitary Butterfly Valve
Sanitary butterfly valves are widely used in the sanitary field. It is called a butterfly valve not because of its shape like a butterfly, but because of the simple structure, easy-to-use compact appearance, and flexible opening and closing. The butterfly is also a small and flexible insect and there are a lot of similarities, so this device is called the sanitary butterfly valve.
The drive mode of the sanitary butterfly valve can be divided into manual, pneumatic, and electric, among which the pneumatic butterfly valve serves as the terminal component in the process control. People have a newer understanding of its importance than in the past. The quality of the product is not only related to the quality of the product itself, whether the user is properly installed, used, and maintained, but also important to calculate and select the type correctly.
Because of the mistake of model selection in the purchase, the system starts and stops, and some of them cannot even be put into use. Users and system designers must pay attention to the selection principle of pneumatic sanitary butterfly valves, and the specific principles are as follows.
Select the appropriate structure and materials according to the process conditions; According to the characteristics of the process object, the flow characteristic of the pneumatic sanitary butterfly valve is selected; Select the appropriate pneumatic sanitation butterfly valve size according to the process operation parameters to choose; Select the necessary auxiliary equipment and reasonably choose the actuator according to the requirements of the process.
In the digital information age, intelligent valve positions or digital controllers will be widely used to realize the nonlinear law and compensate for the non-linearity of the controlled object, and the control object’s non-linearity will be compensated by using less pneumatic hygiene butterfly valve flow characteristics.
The material of the inner part of the valve varies with the temperature, so the influence of thermal expansion under different temperatures should be considered, as well as the change of pressure resistance level under high temperature, corrosion resistance, and fatigue resistance of the material.
Electric sanitary butterfly valves are widely used in many fields, such as petroleum, chemical industry, metallurgy, and hydropower. In the known electric sanitary butterfly valve technology, its seal form is mostly sealed structure, and sealing material is rubber, PTFE, etc. Due to the limitations of structural features, the sanitary butterfly valves are not suitable for high temperature, high pressure, corrosion, and wear resistance industries.