Butterfly Valve Types

What is a Butterfly Valve?
It is a type of valve used to provide fluid control.

Types of Butterfly Valves
We can decouple it into 2 types as Wafer and Lug according to the most used varieties among ourselves. According to the flange connection, it is healthier to use lug type at the line inlet and outlet when using wafer type lines of butterfly valve types that we have decided between. Wafer types usually have 4 ears, while Lug types have 4-8-10-12 ears and have teeth pulled into the ear holes.

What does a Butterfly Valve consist of?
In general, we can say that the following parts are the Body, Disc, Shaft, Seat and Handle

Butterfly Valve Operation
The closing element is the disc rotating around a shaft located on the vertical axis. It forms a disk that opens or closes the full pipe section by rotating around its axis when assembled. Sealing is provided between the metal decoiler and the elastic or plastic sealing elements covering the inside of the body.

Choosing a Butterfly Valve Seat
The seal, which is decided according to the temperature and property of the fluid, is very important for the longevity and healthy operation of the valve. In general, we can classify butterfly valve seats into EPDM, NBR, PTFE and VITON. The most widely used and well-known is EPDM.

Choosing a Butterfly Valve Disc
According to the fluid properties of the valves, we can divide the casting nickel-plated valves into four as 304 Stainless Steel, 316 Stainless Steel, Aluminum Bronze. In mechanical installations, Cast nickel-plated clad cladding is used, stainless steel is preferred in the industrial field and aluminum bronze disc is preferred in the ship sector.

Butterfly Valve Opening and Closing Mechanism
We can open and close Butterfly Valves with manual handle control, as well as open and close them with a Gearbox installed on the valve, which is usually used for large diameters.In industrial areas, butterfly valves are mostly opened and closed using a pneumatic actuator or an electric actuator.

Butterfly Valve Advantages
» Fast and simple installation
» Easy on and off
» Small volume and small weight
» The fact that its price is more affordable than other valves is one of the reasons for the choice.

Fields of Usage
» Used in treatment plants
» Heating cooling water in buildings is used in boiler room, exchanger room
» It is used in hot or cold water installations.
» Used in air lines, compressor line
» It is used in air conditioning plants.
» It is used in processes where viscous fluids such as cement, paint, powder, oil, etc. are used
» Used in the food industry
» Used in the shipbuilding industry
» It is used in petrochemical plants, chemical factories
» Used in the construction industry
» Used in the paper industry
» It is used in fire fighting systems, pumping stations, hidtofor systems
» Used in drinking water, beverage fluids

Considerations for Installing Butterfly Valves
» During the installation of the valve, there should be sufficient dec between the flanges so that the sealing element is not deformed.
» The disk should not be in a closed position during the installation of the valve.» Before tightening the flange nuts, the valve should be opened and closed to check whether the disc is moving freely