Cornerstone designs and manufactures metal seated and soft seated ball valves in both top entry and end entry configurations. Their top entry metal seated ball valves come in bi-directional or double block and bleed. This trunnion-mounted design consists of a one-piece ball with an integral stem. Cornerstone's end entry design metal seated ball valves are bi-directional or double block and bleed.

Superior Valve is a distributor of RAM ball valves for the power plant and petro chemical and industries. Types of ball valves offered include trunnion mounted, metal seated, three way and jacket configurations. Also available from RAM are ball valves with actuators.

Rainey Engineering, Inc. are distributors of Perrin metal seated and specialty ball valves. Other offerings include Tricentric brand triple offset metal seated butterfly valves and Crane brand rubber seated butterfly valves.