The difference and choice between electric cast iron wafer butterfly valve and electric flange butterfly valve-jlsvalve.com

The difference and choice between electric cast iron wafer butterfly valve and electric flange butterfly valve

The difference and choice between electric cast iron wafer butterfly valve and electric flange butterfly valve

As one of the most common valves in pipelines, electric butterfly valves are used to achieve switching and flow control of piping systems. It has been widely used in petroleum, chemical, metallurgy, hydropower and many other fields. application. Among the commonly used electric butterfly valves, it is mainly divided into electric cast iron wafer butterfly valve and electric flange butterfly valves. These two valves have their own characteristics and different performances, and can be used in different industries.

For these two valves, except for the structural form, if the same parameters are used, the biggest difference is that the connection is different, that is, the installation form is different, depending on the working conditions!

The difference between electric cast iron wafer butterfly valve and electric flange butterfly valve:

The thickness of the electric cast iron wafer type butterfly valve is thinner than the thickness of the flange butterfly valve. There are no flanges at both ends of the valve body, only a small number of guide bolt holes, and the valve is connected to the pipe end flange through a set of bolts/nuts. In places where space is relatively narrow, or where there are restrictions on pipes. The advantage is that the disassembly is convenient, the valve cost is low, and the space is small, but the disadvantage is that there is a problem with one sealing surface, and the two sealing surfaces must be removed. turn on!

The electric flange butterfly valve body has flanges at both ends and is connected with the pipe flange. Sealing performance is more reliable than wafer type butterfly valves. It is usually used in places with large diameters or high pressures, but at a relatively high cost. The clip-on butterfly valve is very high.

The choice between the two:

However, there are still some things to be aware of in the design. For example, valve valve bolts are usually very long. Under high temperature conditions, bolts may cause leakage after expansion, so they are not suitable for large diameters under high temperature conditions. . For example, a clip-on butterfly valve cannot be used at the end of the pipe, and downstream needs to be disassembled because the clip-on valve will fall when the downstream flange is removed, which must be short. For the purpose of disassembly, the flange butterfly valve does not have the above problems, but the cost will be higher.

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