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Materials

Body Materials

One of the most essential reqruirements for a valve body is that it is able to withstand pressure, temperature and corrosion. in addition, the production of the body should be affordable and conform to all relevant regulations.

Disc of butterfly valves: designs and materials

The disc inside the butterfly valve controls or shuts off the entire medium flow inside the pipe line. To accomplish this, the disc is turned around its rotational axis into the appropriate position, so that the flow is throttled to suit the require ments. As explained in chapter "Construction types" , the disc is turned in a concentric or eccentric way inside the valve body. When the disc is in the closed position, it bears the full medium pressure, as does the body of the valve, so it is consi

Linings and Seat Materials

Shaft of butterfly valves: materials and designs

The shaft inside a butterfly valve has two functions: to define the position of the disc inside the valve body, and to transfer the torque, which is needed to turn the disc, via the actuator. These are the main requirements which need to be taken into consideration during the design stage of the valve. In addition, the shaft material must exhibit sufficient strength to withstand the high operating temperatures that occur inside the valve.