Why are pilot operated pressure reducing valves used instead of direct acting pressure reducing valves?

Pilot operated pressure reducing valves are favored over direct acting pressure reducing valves primarily due to their ability to provide a wider range of adjustment coupled with greater accuracy in pressure regulation.

Pilot operated valves utilize a smaller pilot valve that senses downstream pressure and controls the main valve, which enables them to handle variations in pressure more efficiently. The design allows for more sensitive adjustment, often making it possible to achieve a precise setpoint even under varying load conditions. This level of control is crucial in applications where consistent pressure is essential for the system's performance.

Furthermore, the ability to manage higher flow rates while maintaining stable downstream pressure enhances their effectiveness, making these valves suitable for a broader range of applications compared to direct acting valves, which are typically more limited in terms of the pressure range they can effectively regulate.