Flange Worm Gear Butterfly Valve with Flexible Expansion Joint

On the basic function of the loose sleeve expansion joint,a limit device is added,locked by double-nut at the place of maximum expansion. The pipeline is flexible within the allowable expansion and contraction. Once the maximum expansion allowance is exceeded, the limit device works to ensure the safety of the pipeline.It is especially suitable for connection in pipelines with vibration or a certain slope and bend. It is suitable for conveying seawater, fresh water,hot and cold water, drinking water,domestic sewage,crude oil,fuel oil,lubricating oil, refined oil,air,gas,steam and granular powder with a temperature not higher than 250¡ÃƒÂ¦.