... Technical Innovation, High Quality, Satisfied Service. In the industry of thermoplastic valves, pipes, and fittings, Shieyu is your partner ... the long-term supply contract with Taiwan biggest industrial group of Formosa Plastic Co.1988.08Established Kaohsiung 1st plant in ... plant in Taichuang Harbor Export processing Zone, Specialize in production of plastic valves and CPVC, PPH, PVDF pipe & fittings. ...