The Sun EPB/OEF3-A2 is a high-performance, pilot-to-open check valve designed for reliable load-holding applications. This screw-in, cartridge-style valve allows free flow from the valve port (port 2) to the load port (port 1) while blocking flow in the opposite direction. The blocked flow can be opened by applying sufficient pilot pressure to port 3. Engineered for the T-11A cavity, the EPB/OEF3-A2 is a robust and versatile solution for preventing load drift in various hydraulic systems, ensuring safety and operational stability. Its durable construction is typical of Sun Hydraulics’ commitment to quality and longevity.