Double offset butterfly valve body die

a double offset butterfly valve body can be modeled by designing the cylindrical body with flanged ends, a central passage for flow, and an offset seat to house the disc. The “double offset” comes from the shaft being placed slightly off-center and away from the sealing surface, which reduces wear and improves sealing performance. Once the body is built, the disc and shaft can be added in an assembly to demonstrate how the valve rotates to regulate flow. This model helps in understanding the design advantages of butterfly valves used in high-performance piping systems.