General service poppet check valves ensure media travels through a system in the intended direction and prevent backflow. Flowing media pushes the poppet attached to its spring-loaded stem away from its seat and opens the valve. When pressure on the outlet side exceeds the pressure on the inlet side (back-siphonage), the poppet is lowered into the flow path to stop the backward flow of media and contaminants. These valves suit low-pressure applications in various industrial applications, such as hydraulic systems.