How does Pilot-Operated Check Valve work?

A pilot-operated check valve allows fluid to flow in one direction while preventing backflow, using a pilot mechanism to control the valve's operation. When fluid flows in the forward direction, it lifts a pilot piston, which opens the main valve and allows flow. If there’s a reverse flow or pressure drop, the pilot piston closes, sealing the valve and preventing backflow. This design ensures reliable operation even under varying pressure conditions, making it suitable for hydraulic systems.