Top Entry Trunnion Ball Valve

ALIS Valves offers Top Entry Trunnion Ball Valves for industrial applications requiring reliable shut-off, robust pressure handling and convenient maintenance access. These valves feature a trunnion-mounted ball supported at the top and bottom to help maintain stable positioning under pressure and reduce excessive loading on the seats. The top-entry design allows access to internal components through a removable top cover, enabling inspection, servicing and replacement of selected parts without necessarily removing the entire valve body from the pipeline. Depending on the valve configuration, the design can incorporate suitable body materials, ball and seat arrangements, stem sealing and pressure-rated connections to meet specific process requirements. This construction makes top-entry trunnion ball valves suitable for demanding services where operational reliability and maintainability are important considerations.

Top Entry Trunnion Ball Valves are used in oil and gas pipelines, refineries, petrochemical plants, gas processing facilities, power generation and other industrial process systems. Depending on the selected materials, pressure class and sealing arrangement, they can be specified for compatible liquids and gases within their rated operating limits. Important selection factors include valve size, pressure rating, operating temperature, process media, body and ball materials, seat design, sealing performance, end connection standard and operating torque. Buyers should also consider the required leakage class, fire-safe requirements where applicable, and compatibility with manual, pneumatic or electric actuation systems. The top-entry construction can simplify maintenance, but the actual servicing procedure depends on the valve design and manufacturer’s instructions. Selecting the appropriate valve configuration helps support dependable pipeline isolation, efficient maintenance and reliable long-term performance under the intended operating conditions.