Switching devices are designed for the distribution of working fluid flow and for mixing flows on pipelines lines, vessels, vehicles and technological installations.it is also used at installation in conjunction with safety valves in those cases, where by operating conditions you might need to disconnect (close) one of the relief valves and simultaneously connect (open) the other one. It is used in vessels, pipes or processing plants for the petrochemical, chemical, energy, oil and gas processing, extracting, transporting, and other production.It can be used at temperate, cold and tropical climates as per GOST 15150.