The safety check valve, also known as a parachute valve, belongs to the valve family. These valves are mounted directly on the cylinder and prevent uncontrolled movement in the event of a line or hose rupture.

When the flow rate is higher than the set value, a flat valve held away from the seat by a spring is brought back to the seat by the instantaneous increase in flow caused upstream by the hose or pipe rupture, the valve closes and prevents the fluid from flowing, slowing down or braking the cylinder speed.