King Da Jeng Co., Ltd. (KDJ)

King Da Jeng Co., Ltd. (KDJ) is a Taiwanese manufacturer of plastic valves and pipe fittings, founded in 1998 and based in Qingshui District, Taichung City. The company specializes in acid-resistant and alkali-resistant plastic valves, pipe fittings and connections, with a lineup that includes KDJ-series ball valves in male threaded and socket versions, ball valves with stainless steel handles, check valves, foot valves, double union ball valves in manual, pneumatic and electric versions, true union ball check valves and butterfly valves in handle type and actuated configurations.

Its fitting range covers flanges, rubber gaskets, unions, couplings, 90 and 45 degree elbows, tees, Y tees, caps, reducers, bushings, male adapters and clear pipe fittings. KDJ products are suitable for acid and alkali resistant industrial systems, pure water systems and general drainage and water supply applications including fishery irrigation, agricultural irrigation and air conditioning systems. Under its own KDJ brand marketed worldwide, the company offers new product development and OEM services and has held ISO 9001:2015 certification since 2017.