Valley National Gases, doing business as Plymouth Wayne Welding & Supply, is a regional business unit of Matheson Tri-Gas. It is a supplier of industrial, specialty and medical gases and welding and safety supplies. The independent company serves clients in the industrial, residential, retail, mining, manufacturing and health care markets. Valley National Gases also offers cryogenic equipment and cutting systems. It maintains locations in Florida, Maryland, Minnesota, New Jersey, Pennsylvania, Virginia, Wisconsin and Maine. In addition, the company provides safety management, equipment rental and laser support services. Valley National Gases subsidiaries include General Welding Supply Company, Wolfenden Industries and Industrial Air Products.