What materials are butterfly valves typically made from?

Butterfly valves can be manufactured from a variety of materials, depending on the specific application and the properties required.

Some of the common materials used for butterfly valves include:

1. Cast iron: Cast iron is a popular and cost-effective material for butterfly valves, particularly in water and wastewater treatment applications, as well as in certain industrial processes.
2. Stainless steel: Stainless steel is a common choice for dn 2000 butterfly valve, especially in applications that require corrosion resistance, such as in the chemical, food and beverage, and pharmaceutical industries.
3. Aluminum: Lightweight aluminum is sometimes used for butterfly valves, particularly in smaller sizes or applications where weight reduction is important, such as in HVAC systems.
4. Brass: Brass is a copper-zinc alloy that offers good corrosion resistance and is suitable for use in water and plumbing applications.
5. Plastic/polymer: Certain types of plastics or polymers, such as polyvinyl chloride (PVC), polypropylene (PP), or polytetrafluoroethylene (PTFE), are used for butterfly valves in applications where corrosion resistance and chemical compatibility are essential.
6. Composite materials: In some specialized applications, butterfly valves may be made from composite materials, such as fiberglass-reinforced polymers, which provide high strength-to-weight ratios and corrosion resistance.

The choice of material depends on factors such as the operating pressure, temperature, chemical compatibility, and the overall cost of the application. In some cases, the valve body and the disc may be made from different materials to optimize performance and durability.