On the highways along which compressed air is transported, hot or cold water, or other non -aggressive liquids, the valves are installed reverse couplings for automatic overlapping or passing the flow in one direction.
Finding valves are made of various sections and join the pipes using a cylindrical thread. The direction of the flow of the medium is indicated on the valve body, and in the case of changing its movement, the flow is overlapped. The locking part is a spring -loaded spool on a rod of glass -flavored polyamide. The valve body is made of brass. Valves can be mounted on networks with a working temperature of up to 100 degrees and pressure from 0, 05 to 40 bar. If mechanical impurities may be present in the environment, a mesh filter must be installed in front of the check valve valve.