About Us

ZiInCheol Co., Ltd. was established in 2004 as Hyunwoo Sangi Co., starting with absorption chiller valve manufacturing. In 2008, we entered the marine safety field by developing crankcase explosion relief valves for marine engines, registering 6 patents for the flame emission prevention Arrester Unit to secure proprietary technology. We have since grown into a trusted safety valve specialist in the global market with 11 international classification society certifications.

After renaming to ZiInCheol Co., Ltd. in 2015, we established an in-house R&D center in 2020 and successfully developed next-generation relief valves for DF engines (ZRI, ZRE) and Gas Venting Valves (ZGV). We hold INNO-BIZ and MAIN-BIZ certifications, with ISO 9001, ISO 14001, and ISO 45001 certifications ensuring quality, environmental, and safety management systems.