SEDCO was the first private company to manufacture a Pressure Relief Valve for Automotive A/C applications. These valves are designed with a “soft seat”, utilizing specially engineered elastomer seals. Each valve is 100% tested prior to shipment. And, SEDCO can perform all performance and endurance testing required by the major automobile manufacturers, in our state of the art laboratories. SEDCO actually wrote the original specifications that are commonly used by the OEM’s today.