Spheroidal graphite cast iron wafer type butterfly valve

Butterfly valve is a commonly used small and medium-sized control valve, widely used in various industrial pipelines, petroleum, chemical, food, medicine, aviation, machinery and other fields due to its unique structure, light weight, easy operation, good sealing, strong valve flow capacity, and convenient installation. 1、 On the Structure of Butterfly Valves in Universal valve The butterfly valve uses a "gate" as the opening and closing element, which can control the on/off and flow of the pipeline through rotation, and has the characteristics of simplicity and practicality. The sealing surface of the gate is in contact with the fluid inside the pipeline, and its material and shape directly affect the sealing and flow capacity of the valve. Modern butterfly valves often use gate plates made of metal and rubber materials, which are applied to different working conditions. For example, rubber rams are suitable for low pressure and highly corrosive media, while metal rams are suitable…