Rominserv Valves Iaifo Zalau was established in 1969, being specialized in the design, production and sale of a wide range of. cast iron and steel fittings and spring safety valves.. Since 2004, the company became a member of the Rompetrol Group, by including it within the activities of the general contractor of the Group, Rominserv. The company is specialized in the design, production and sale of industrial fittings, in a wide range of types and sizes used in the following fields: oil and petrochemicals, gas transportation, thermal plants, water distribution networks, low and high working temperatures as well as for specific work environments.