Butterfly valves are a commonly used solution in installations, they enable convenient and effective regulation of flow between successive sections of the pipeline. What types of butterfly valves can be distinguished, how is it constructed and in what situations are they used?
Check out the butterfly valves at the Onninen wholesaler
Types of butterfly valves
The butterfly valve, or throttle valve, is one of the most commonly used solutions. Its basic role is to regulate the flow of liquid in the system. This effect is achieved thanks to the special construction of the valve. The main element of the structure is a disc , which, when rotating, resembles butterfly wings - which is why it owes its name.
In practice, butterfly valves are available in various versions. When analyzing the available solutions, you can be guided by various criteria. One of them is the type of construction. The first is a butterfly valve with a flanged structure, which is attached to the pipes using special flanges. In the inter-flange annular construction, the valve itself does not have flanges, and the attachment is made using pipe flanges. The last solution is inter-flange constructions with ears. In this version, the whole thing is attached with special, external screws.
The second criterion of division refers to the location of the disk. Here we distinguish:
- concentric valve, also called coaxial, is the simplest design in which the shaft is located in the central part of the disk;
- double eccentric valve, a characteristic feature is the displacement of the shaft and disc relative to each other, in two planes (along the fluid flow axis and the pipe cross-section plane;
- triple eccentric valve, which differs from the previous variant by an additional offset along the axis of the disc shear.
How is a butterfly valve constructed?
The butterfly valve has a specific structure in which four characteristic elements can be distinguished:
- valve body ;
- disk;
- pin;
- nest.
Each of the components plays a very important role in the proper functioning of the entire system. When the valve is closed, the disk inside blocks the flow of the fluid in the system. The valve is activated after the stem is connected to the actuator.
Application and purpose of non-return butterfly valves
Simple design and effective effect of operation make butterfly valves widely used in various branches and industries. Valves with a disc work well in installations with both cold and hot water. They can be installed in open and closed systems. Butterfly valves work great in water and heating installations.
Both the butterfly valve and the ball valve are used to cut off the flow, but both variants are used in different situations. The valve designed for high-pressure installations is characterized by high quality of operation, while where butterfly valves are used, the operating temperature is not important, but the pressure regulation system, allowing it to be balanced.
Butterfly valves at the Onninen wholesaler
Butterfly valves are very popular due to their numerous advantages. They are modern and effective solutions with a solid and durable construction. Versatility is also important. High-quality models are available at the Onninen wholesaler.
Among the simplest and most popular solutions, we should mention the chrome tap, BSZ head with a butterfly knob . Its construction resembles a classic tap, easy to use. A product prepared by the Schell brand, a manufacturer with extensive experience and trusted by professionals. The product is equipped with a backflow block and aerator. Thanks to the threaded connector, it can be easily attached to the hose.
The offer also includes FAF butterfly check valves . Due to their specific design, they are mainly used in heating and air conditioning networks, as well as water and industrial networks. FAF butterfly valves can be installed in water or oil installations and wherever the substances in the system do not react with carbon steel. The Onninen wholesaler offers various valve variants, adapted to the needs of different installations. Before buying, it is best to check the detailed technical data to choose the type of valve with the right size. We offer models with DN: 40, 50, 65, 80, 125, 150, 200, 250, 300, 350 and 400.
A special variant is the double eccentric flanged butterfly valve . This product is prepared by the Aeon brand. It is a solution commonly used in installations regulating the flow of drinking water, as well as purified municipal sewage. They can also be installed in systems filled with non-aggressive media.