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Materials and Styles of Butterfly Valves

If you’re considering a butterfly valve, understanding the key materials and styles is essential. Butterfly valves come in various materials, including Cast Iron, Duplex Stainless Steel, and Brass, as well as different body styles like the Wafer style. Each option has its own strengths and is suited for specific applications. Read on to discover which butterfly valve material and style is right for your needs.

• Cast iron

A Cast iron butterfly valve is used to open and close a flow passage. These valves have high ductility and high resistance to temperature and pressure, which makes them suitable for a variety of high-temperature applications. Because of these properties, butterfly valves are commonly used in the petrochemical industry, chemical industries, and water and wastewater treatment facilities. Cast iron butterfly valves are particularly suitable for applications that expose them to water, as they prevent the valves from reacting to the constant contact with the fluid.

• Duplex stainless steel

If you are looking for an industrial butterfly valve, you may want to consider the Duplex stainless steel option. This type of valve has a balanced structure composed of two different alloying elements, chromium, and molybdenum. This combination of elements makes these valves a superior choice for many industrial applications. In addition to being extremely durable, these valves also have excellent resistance to pitting corrosion. If you are concerned about corrosion, you should consider the Duplex type.

• Brass

Brass butterfly valves are often used in water treatment applications. Brass is a metal alloy composed of zinc and copper. It is a tough material that withstands high temperatures. Brass is also valued for its corrosion, biofouling, and antimicrobial properties. They are also relatively inexpensive, which makes them a cost-effective solution in some applications. However, they are not appropriate for high chlorine water, as it dezincifies brass.

• Wafer body style

A wafer-style butterfly valve is generally used between two flanges on a pipe. Its body is surrounded by flange bolts, which allows it to fit most piping flanges. The Lugged Butterfly Valve has threaded lugs in the body. This feature allows it to be disconnected from one line while leaving the other side open. A butterfly valve is also classified as a quarter-turn valve, and its opening and closing are incremental.

Advantages Of Butterfly Valves

Butterfly valves offer the primary advantage of controlling liquid, gas, and slurry flow. They come in various sizes and design configurations to meet a variety of applications.

Butterfly valves offer several key advantages, including their compact design and versatility in applications. Furthermore, they are lightweight and require minimal upkeep.

They can be installed quickly and cost-effectively by piling systems, saving installation time and effort. Furthermore, their quick 90deg rotation of the handle or actuation system makes them ideal for emergency shutoffs.

These valves can be used in a range of industrial processes, such as pulp and paper manufacturing, food and beverage processing, refineries, power plants, and oil and gas exploration and production. Furthermore, they come in an extensive selection of materials and sizes to suit the requirements of any application.

Butterfly valves boast high reliability and can withstand a variety of operating conditions. Not only are they insensitive to water hammers, but they’re also resistant to extreme temperatures.

In addition to the above, butterfly valves are easy to install and require little upkeep. This makes them a great option for many applications; however, be sure to select an established manufacturer or supplier for your project. Look for companies that provide product warranties as well as customer support teams; this will guarantee you get the best service from your butterfly valves.

Disadvantages Of Butterfly Valves

Butterfly valves have the common disadvantage of being susceptible to cavitation and water hammer damage due to their constant placement in pipes with high air turbulence. Over time, this can corrode the disc, leading to a loss in sealing pressure.

Another disadvantage is that the disk-shaped valve seat can become clogged with debris. This prevents it from opening or closing properly, leading to leaks and other issues.

These valves may not be appropriate for all applications. They’re especially ineffective with viscous or corrosive fluids due to their susceptibility to scouring against the discs of the valve, leading to rapid deterioration and loss of sealing pressure.