It is just a fully welded valve. It doesn't have leakage issues by means of bolt connections. You can’t manage or restore the welded system valves on-web site. Municipal drinking water cure crops use ball valves for controlling the stream of water in several processes, like filtration, chlorination, and distribution. https://titusfloon.governor-wiki.com/1445454/the_2_minute_rule_for_ss_flanges