What is the purpose of the drain on a pressure sequence valve?

The purpose of the drain on a pressure sequence valve is to remove any fluid leaking past the piston. In the context of fluid power systems, pressure sequence valves are designed to control the sequence of operations of various components by directing hydraulic fluid based on pressure levels. Over time, some fluid can seep past the piston, which can affect the valve's performance and the system's overall efficiency.

The drain function is essential because it helps maintain consistent pressure within the valve, ensuring that the valve operates correctly without the interference of leaking fluid. By effectively managing this leakage, the valve can maintain accurate sequencing and prevent malfunction, thereby improving the reliability of the hydraulic system.

Other options relate to different functionalities of pressure sequence valves or fluid power systems but do not specifically address the role of the drain in managing leakage, which is critical for optimal operation.