DRH found in 1989, is an enterprise that integrates casting, machining, and valve manufacturing. Located in Changxingdao, Dalian. After nearly 30 years of development, the company's fixed assets have exceeded 280 million yuan, covering a total area of 68000 square meters and a building area of 40000 square meters. QMS:ISO9001 certified. DRH QMS:ISO9001 certified. Material: FC150, FC170, FC200, FC250, FCD400, FCD450, FCD500, FCD600, Cast steel ZG230-450 and Stainless steel 304/316L. Production: Automatic Molding Line with ZZ416B, X7060 and X8065, resin sand molding, Lost Foam Casting Production Line, Stainless Steel Welding.