In operation for more than 40 years, Norriseal is a manufacturer of level, pressure and temperature control products. The company offers regulators and control and check valves. It provides products for refining, chemical processing, marine, power generation, and oil and gas production applications. The company has achieved ISO 9001 certification. Norriseal also offers installation services. The company maintains an over 62,500-square-foot manufacturing facility. It provides switches, chambers, domes, manual handles, gear operators and accessories. In addition, the company offers in-house engineering and technical support services. It provides operation and maintenance guides. Norriseal is a part of Dover Corporation, which is a manufacturer of industrial products.