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elastoform valves consist of two main assemblies: the valve body assembly and the actuator assembly (or actuator system). They are divided into four major series: single-seat control valves, double-seat control valves, sleeve control valves, and self-operated control valves. Variants of these four valve types can result in numerous different applicable structures, each with its specific applications, features, advantages, and disadvantages. Although some control valves have a wider range of operating conditions than others, control valves are not suitable for all conditions, to jointly build enhanced performance,