... in Taiwan who has designed and manufactured a complete system of valves, pipes, and fittings. For the past 39 years, we have ... Valve, and Check Valve from a broad range of materials such as UPVC, CPVC, HDPE, PPH, PPs and PVDF. Shieyu has imported ... Technical Innovation, High Quality, Satisfied Service. In the industry of thermoplastic valves, pipes, and fittings, Shieyu is your partner and first choice ...