February 2, 2018
Originally a division of TRW, CMC is now a subsidiary of Maven Engineering Corporation. We use a unique process to manufacture our valves, whereby the valve head and stem are flash welded. This reduces the possibility of cracking or breaking – distinguishing our valves from those of our competitors. We use a computer-controlled flash welder to accurately control every phase of the heating and upset/forging phase of the welding operation. We also use Fiber Optics to accurately measure the temperature of the tip during heating, which ensures optimum quality in the manufacturing process.
At CMC, we understand that superior grain flow provides the strongest valve heads available. Our steel is heated by electrical resistance between two contacts and forced through the contacts by a hydraulic ram until enough volume is “upset” to make the pre-form. The pre-form is then passed immediately to the forge. Forging refines the grain structure and improves physical properties of the metal (strength, ductility and toughness).
As part of our ISO 9001:2008 Quality Management System, CMC stamps all of its valves on its stem with identification that enables us to trace the material and heat treat certifications, process and inspections reports for each valve.