It was in 1956 that ASAHI YUKIZAI pioneered the manufacture of plastic valves. There were only metal valves in those days, and sites that handled chemicals or seawater had no option but to frequently replace valves due to corrosion and rusting. That is what inspired us, as a company that dealt in plastics, to develop our vinyl chloride valves, Nowadays many manufacturers sell plastic valves, but our strength is that no other company can match the technical know-how we have amassed over many years or our extensive product lineup.