They are used to prevent mutual influence of various hydraulic lines in a multi-threaded system. For example, in the line where several pumps are installed controlling one working body (in the hydraulic press, the displacement line and the line of the working load). They can have various locking and regulating elements: ball, conical, dish-shaped or plunger.
Z1S Series Valves are modular check valves.
Valves CIT Series - Pipe-mounted check valves with internal thread.