Pneumatic Trunnion Ball Valve

ALIS Valves offers Pneumatic Trunnion Ball Valves for industrial applications requiring reliable pipeline isolation, automated operation and dependable performance under demanding pressure conditions. These valves feature a trunnion-mounted ball supported at the top and bottom, helping maintain stable ball positioning and reduce excessive loads on the valve seats during operation. The ball rotates to align its bore with the pipeline for flow or turns to block the passage for shut-off. A pneumatic actuator uses compressed air to operate the valve, enabling remote control and integration with industrial automation and process control systems. Depending on the application, the valve can be configured with suitable body and ball materials, seat arrangements, stem sealing and pressure-rated components to meet the specified operating requirements. The actuator can also be selected with suitable accessories to provide the required operating function and control response.

Pneumatic Trunnion Ball Valves are used in oil and gas pipelines, refineries, petrochemical plants, natural gas processing facilities, power generation units and other industrial fluid-handling systems. Depending on the selected materials, pressure class and sealing configuration, they can be specified for compatible liquids and gases within their rated operating limits. Important selection factors include valve size, working pressure, operating temperature, process media, body and ball materials, seat design, leakage requirements, end connection standard and operating torque. Buyers should also consider the compressed-air supply pressure, actuator sizing, control accessories and required fail-safe action, such as fail-open or fail-closed where applicable. For critical isolation services, fire-safe qualification, anti-static features and stem blowout protection should be verified when required. Selecting the appropriate valve and pneumatic actuator combination helps support dependable shut-off, efficient remote operation and reliable performance under the intended working conditions.