Metal Seated Trunnion Ball Valve

ALIS Valves offers Metal Seated Trunnion Ball Valves for industrial applications requiring reliable flow isolation, durable sealing surfaces and performance under demanding pressure and temperature conditions. These valves feature a trunnion-mounted ball supported at the top and bottom, helping maintain stable positioning and reduce excessive loads on the valve seats during operation. The metal-to-metal seating arrangement uses metallic sealing surfaces designed to withstand demanding service conditions where conventional soft-seated valves may not be suitable. As the ball rotates, its bore aligns with the pipeline to allow flow or moves away from the flow path to provide shut-off. Depending on the application, the valve can incorporate hardened or specially treated ball and seat surfaces, suitable body materials and pressure-rated sealing components. Manual, pneumatic or electric actuation options may be available according to operating torque and automation requirements.

Metal Seated Trunnion Ball Valves are used in oil and gas pipelines, refineries, petrochemical plants, power generation facilities, steel manufacturing and other industrial systems handling demanding process media. Depending on the selected materials, pressure class and seat design, they can be specified for compatible liquids, gases and other process fluids within their rated operating limits. Important selection factors include valve size, working pressure, operating temperature, differential pressure, process media, body and ball materials, seat hardness, allowable leakage rate and operating torque. Metal-seated valves may have different shut-off performance from soft-seated designs, so the required leakage class should be confirmed during specification. Buyers should also evaluate erosion, corrosion, thermal expansion and fire-safe requirements where applicable. Selecting the appropriate trunnion support, seat configuration and surface treatment helps support dependable isolation, resistance to seat wear and reliable performance under the intended operating conditions.