China supplier oil and gas 1 2 inch spring brass check valve

We manufacture brass valves, various fittings, hose, since 1998. ISO9001 & ISO14001 compliant. With import automatic machines, experienced engineers and workers, strict quality control system, clean production environment and human-based management, our company and products won great reputation and the cooperation is satisfying. Established in 1998, Ningbo Jiekelong Valves Manufacturing Inc. is located in Cicheng, Ningbo, with convenient transportation by water, land and a...