What is true about pilot to open check valves?

Pilot to open check valves are designed to remain closed until a specific pilot pressure is applied. When the pilot pressure is present, it overcomes the force that keeps the valve ball seated against its seat, allowing flow to occur. This is crucial in systems where controlled flow is necessary only under certain conditions, as it prevents backflow in the absence of pilot pressure.

The valve’s operation relies on the differential pressure created by the pilot line, which is essential for ensuring that the valve opens and allows fluid to pass through only when the desired conditions are met. This functionality makes pilot to open check valves particularly useful in applications where preventing backflow is necessary when the main flow is not needed. The mechanism ensures that the valve is effectively controlled while minimizing the risk of unintentional flow, enhancing system safety and efficiency.