Offshore platform for offshore drilling, oil extraction, CSCL, observation, navigation, construction and other activities to provide production and living facilities of structures.  Offshore environments are rugged areas that require specialized products to handle the aquatic environment and unique service conditions ranging from simple water and salt intrusion to special corrosion and pressure requirements.Follow the development of offshore oil field exploitation, the amount of offshore platform need valve also gradually increasing. Offshore platform need shut off ball valve, check valve, multi-channel valve.