The valve stem and socket connection using both only with a small surface, and the stem easy displacement

As the valve core material is soft PVC, low strength, deformation, coupled with the use of the stem and the valve plug socket connection, not only with the two facets, and the stem easy displacement. Thus, soft spool off easily deal with them more difficult. To this end, in the end face of the original spool of welding a piece of hard PVC  Stainless steel needle valve  plate, completely solve the problem of the spool off. The specific method is to remove the spool system with a hard thick  Valve manifolds  stiffeners do smm, its outer diameter smaller than the outer diameter of about spool 10mm, to facilitate welding; width slightly larger than the diameter of the stem to facilitate flexible stem rotation.