Classification and Usage of Butterfly Valves

1. From the selection of materials, butterfly valves can be selected using stainless steel, carbon steel, cast iron and galvanized steel. Firstly, it depends on the operating temperature and other parameters to choose different materials. For example: if the temperature exceeds 400 degrees Celsius, stainless steel should be chosen as the main material.

2. From driving methods, there are electric, pneumatic and manual methods. The most common driving methods are three in practice, and they mainly depend on the customer''''''''s selection and the working condition to formulate them.

3. From the external shapes, butterfly valves can be divided into circular, square, and leaf types. Firstly, it depends on the equipment to confirm the selection.

4. From the connection methods, mainly used are double-head bolt, flanged, and welded. Which connection method is selected depends on the actual situation. The double-head bolt butterfly valve is connected between the two pipe flanges of the two pipes, and the flanged butterfly valve has a flange on the valve body that is screwed to the pipe flanges.

5. From the sealing surfaces, there are soft sealing butterfly valves and hard sealing butterfly valves. Soft sealing butterfly valves mainly use fluorine-filled or rubber-coated materials to achieve the sealing requirements, but there are constraints on temperature. For high temperature requirements, hard sealing butterfly valves can be used with metal sealing.