What material is generally suitable for the adapter sleeve between the valve stem and the actuator of pneumatic and electric valves?

When selecting the material for the adapter sleeve between the valve stem and the actuator of pneumatic and electric valves, various factors need to be taken into account, such as the operating environment, torque level, and corrosion resistance. For valves that require high torque, the following materials are common choices with excellent performance: 1. **Stainless steel**: Stainless steel offers good corrosion resistance and high strength, making it suitable for most working environments. Common stainless steel grades include 304, 316, etc. 2. **Carbon steel**: Carbon steel has high strength, but poor corrosion resistance. In certain non-corrosive environments, carbon steel is an economical and practical choice. Common carbon steel grades include Q235, Q345, etc. 3. **Alloy steel**: Alloy steel is created by adding certain amounts of other elements to carbon steel in order to improve its properties. Alloy steel possesses high strength and good corrosion resistance, making it suitable for high-torque applications and harsh environments. Common alloy steel grades include 42CrMo, 40Cr, etc. 4. **Aluminum alloy**: Aluminum alloys have a low density and good corrosion resistance, but their strength is relatively low. In valves that require high torque, aluminum alloy may not be the best choice, but in certain specific applications, such as lightweight valves, it still has certain advantages. In summary, for valves that require high torque, stainless steel, carbon steel, and alloy steel are good material choices. The specific material to be chosen depends on the actual working environment and the requirements for using the valve. .