Butterfly Valve Disc Material Selection Guide
Compare common butterfly valve disc materials—including epoxy-coated ductile iron, stainless steel, aluminum bronze, and coated discs—by corrosion resistance, mechanical strength, operating torque, temperature capability, cost, and media compatibility. Epoxy-coated ductile iron suits water and HVAC systems, stainless steel is preferred for chemical and hygienic service, and aluminum bronze provides strong seawater resistance for marine and offshore applications