The 4" (DN100) butterfly valve is a widely used size across multiple industries, striking the perfect balance between flow capacity and ease of handling. Whether used for isolation, throttling, or automated flow control, this size is ideal for medium-duty systems in sectors such as water treatment, HVAC, chemical processing, and food production.At Actuation Valve, we supply 4" butterfly valves in a range of body materials including ductile iron, stainless steel, carbon steel, and PTFE-lined options. With TTV’s reliable construction, you can expect precise shutoff, low torque operation, and excellent corrosion resistance.