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The term Butterfly valves is also used to refer to quarter-turn valves where its main function is to control or isolate the flow of liquid passing through the pipes. This type of valve is commonly used in treatment of waste or water specifically in the agriculture industry. This is also one of the most common types of valve that is being sold these days especially because it is quite durable, requires less maintenance, and is made to withstand even heavy duty needs.
When compared to an electric ball valve, the butterfly valve works almost the same. At the center of the pipe, there is a flat disc that has a rod running straight through it that is then connected to the actuator. The actuator is located outside of the valve where, if it is turned, can actually control the position of the flat disc to control the flow. A few rotations can help in controlling the amount of water or waste flowing through the pipes easily.
Butterfly Valve's Parts
The term “butterfly” is used to refer to the metal disc which can be found on the rod which when positioned to a quarter turn, opens the disc allowing the flow of liquid unhindered. Through a few adjustments on the valve, the flow of the liquid can either be restricted or let loose. This feature is one of the advantages that can be gained when using a butterfly valve especially for industrial uses. Another is the size of the butterfly valves. Compared to other types of valves out there such as the electric ball valve, butterfly valves are far lighter and more compact hence they don’t require additional support when in use.
The best thing about the butterfly valve is that it contains the following: a butterfly disk, resilient seat, actuator, body, packing and of course a notched plate that is used for positioning. Once the resilient seat is added to the body of the valve, compression is added thus causing a seal around the upper and lower points where the stem runs through as well as at the disk edges. If the seat suffers from any damage, the packing provides additional seal around the stem of the butterfly valve for added protection.
Although there are different types of butterfly valves being sold today, the best type is one that is configured for pneumatic control. This type makes use of a gearbox that requires a signal from the operator to both close and open the electric ball valve. The advantage to using this type of butterfly valve is its flexibility since it allows either single or double actuation. In the case of the single actuation, it is important for it to have a fail-safe so that if the power gets cut off, the valve will be able to turn into the closed position. In the case of double action valves, they need signals every time they are being opened or closed since they are not loaded with a spring.