Weifang Guanyu Machinery Co.,Ltd. is located in Weifang City of Shandong Province, known for its world famous kites.  Our company uses precision casting and advanced technology to produce various types of stainless steel ball valves, pneumatic angle seat valves, pneumatic flange valve, knife gate valves, and quick connectors.  Our products are used in water supply and drainage, food, petrochemical, pharmaceutical, pulp production, sewage treatment, brewing, powder product, crystal, etc. industries.  Our products are well received on the domestic and international markets, as they are directly or indirectly exported to Europe, America, the Middle East, Southeast Asia, and South Africa. Our company has already passed through many years of development, becoming a research and development, casting, and technical inspection service high technology enterprise.  We have advanced silica sol casting production lines and a CNC Machining Center, which have passed ISO9001 Quality System Certification, CE Safety Guarantee, and Patent 2. We are also members of the China Foundry Association. “Respect Knowledge, Respect Talent,” allows Weifang Guanyu Manchinery Manufacturing Limited to enter the fast-track of development for precision casting. “Quality first, reputation on top,” and strictly implementing the standards of the ISO9001 Quality System Certification allows us to continuously maintain a higher reputation.“Solid Work, Integrity of Life,” allows us to be rated an “Integrity Enterprise” over successive years.