Applicable to water supply and drainage pipes for petroleum, electric engineering, chemical engineering, medicine, light textile, paper making and food, etc. It can stretch in axial direction within certain scope but also overcome the deviation produced due to connection of the pipes with different shafts with certain angle scope. It is only used to dismantle the valves and limit the position with installation of bolt so as to make it convenient to dismantle and install the valve and pipes significantly

Design and manufacturing standard: GB/T 12224

Press test standard: JB/T 13927

Reasonable structure, sealing, quick and convenient installation.