ATI recently completed an installation of its gas motor actuator at a gathering station for Semgas, L.P. in Oklahoma. As a result of the successful installation and operation, Semgas has ordered 28 additional ATI gas motor actuators for its pig launching applications.
Semgas had previously outfitted its launcher/receiver systems with conventional low pressure scotch yoke actuators on ball valves. They experienced actuator operating problems when unseating the valve, impacting pig travel within the line. Semgas opted for the gas motor actuator as a possible solution after discussing the application with MRC Tulsa and ATI. The ATI gas motor was chosen for its capability to provide a smoother operation, lower cost, and quicker lead times.
The design uses pipeline gas to drive a motor direct mounted to a gear train. This installation also used a local auto-manual control module based on dual poppet valve control. The system is noted for its simplicity of design, lighter weight, compactness, reduced gas consumption and operating efficiency.
