CAELUM Co., Ltd.

CAELUM Co., Ltd. manufactures and sells geothermal, LNG, and oil and gas plant equipment worldwide. Its products include LNG products, shell and tube heat exchangers, air cooled heat exchangers, pressure vessels, towers and columns, skids, H.R.S.G. and piping spools, and finning machines. The company was formerly known as EWK Inc. and changed its name to CAELUM Co., Ltd. in March 2022. Founded in 2009, it is headquartered in Busan, South Korea, and as of July 6, 2026, operates as a subsidiary of Green Tech System Co., Ltd.