Main differences between cast iron butterfly valves and cast steel butterfly valves

"Cast iron is more rigid and brittle than cast steel, and cast steel has better plasticity and toughness than cast iron. Therefore, cast iron is generally used in pipelines with relatively low pressure, but it can only be used in pipelines at normal temperature. Because an increase in pressure or temperature indicates that the valve will have a certain amount of deformation, which is unfavorable for cast iron butterfly valves, compared to cast iron butterfly valves,", Cast steel butterfly valves can be used in pipelines with high pressure or temperature.