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Welcome to the Carl M. Cummings Manufacturing Company (CMC). Our roots go back to the 1920s, when we were part of TRW. In 1960, TRW spun off its valve manufacturing division, and CMC continued manufacturing valves with the same technology in Southern California. A subsidiary of Maven Engineering, CMC is dedicated to quality and reliability. Our valves are used in locomotive, marine and industrial engines around the world.
To ensure the highest reliability and life span of its valves, CMC uses a unique process whereby the valve head and stem are flash welded. This reduces the possibility of cracking or breaking, and separates our valves from those of our competitors. By using a computer controlled flash welder, we can accurately control every phase of the heating and upset/forging phase of the welding operation. In addition, we use Fiber Optics to accurately measure the temperature of the tip during the heating process, ensuring optimum quality in the manufacturing process.