VSSJA-1/BF single set of limit telescopic joint Falan Song The product is applicable to side with the flange connection, side and pipe welding, installation and adjustment of product at both ends of the installation of pipe or flange length of the diagonal bolts evenly tighten the gland, and then adjust limit nuts, so you can make Within the pipes in the amount of free telescopic retractable, locking telescopic amount of the safe operation of pipelines.