Common Types of Manual Valves

Manual valves are critical control components in pipeline fluid conveyance systems. Widely used in industrial applications, they are designed to ensure smooth fluid flow and safe system operation. This article focuses on four common types: manual butterfly valves (featuring a simple structure and easy operation; available in handle-operated and worm-gear types, suitable for pipes of various diameters), manual gate valves (commonly used in water supply systems; available in exposed-stem and concealed-stem types, with an intuitive indication of open and closed states), manual ball valves (used for shutoff, diversion, and flow regulation, with a spherical operating element), and manual globe valves (offering good wear resistance and easy maintenance, though requiring high torque to open and close, with a nominal diameter ≤200 mm). Selection should be based on pipeline characteristics and operating conditions to ensure efficient and stable system performance.