Yeah Chieng Enterprise Co., Ltd. was established in 1987. Mainly produces API 6D Valves and becomes an OEM factory for major ball valve manufacturers. Obtained API 607 fire protection certification from Southwest Research Institute SwRI in the United States in 1993, becoming the pioneer of ball valve fire protection certification in Taiwan.Obtained ISO 9001 in 1999, API Q1 certificate in 2000, and officially launched its own brand ZV Valves. It produces its own API 6D ball valves and handles all metal processing, assembly, and testing. Related products include Trunnion Mounted Ball Valve, Floating Ball Valve, and Forged Ball. Valve, Special Material Ball Valve. Products are used in major natural gas and chemical industries.