SUN HYDRAULICS
RPEEJNN

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Sun Hydraulics directly.***
The Sun Hydraulics RPEEJNN (Material Number: RPEEJNN) is a fast-acting, pilot-operated, balanced piston relief cartridge designed for pressure-limiting applications in hydraulic systems. This normally closed valve protects hydraulic components from pressure transients by opening to the tank port when the inlet pressure reaches the valve setting, thus throttling flow to limit pressure rise. The valve is characterized by its rapid response time of approximately 2 milliseconds and low-pressure rise versus flow, making it highly efficient in managing sudden pressure changes. It features a main stage orifice protected by a 150-micron stainless steel screen and accepts maximum pressure at port 2, making it suitable for cross port relief circuits. However, due to spool leakage, it is not recommended for load-holding applications. The RPEEJNN valve incorporates Sun's floating style construction to minimize internal part binding due to installation torque or machining variations. It operates with a maximum capacity of 25 gpm (95 L/min) and can withstand a maximum operating pressure of 5000 psi (350 bar). The adjustment mechanism allows for five clockwise turns to increase the setting, with an internal hex size of 5/32 inches (4 mm) for the adjustment screw. The valve's installation requires a torque of 30\u201335 lbf ft (41\u201347 Nm), while the locknut requires a torque of 80\u201390 lbf in (9\u201310 Nm). Physically and functionally interchangeable with other two-port relief cartridges within its frame size, the RPEEJNN model ensures compatibility and ease of integration into existing systems. Its design allows backpressure on tank port 2 to be directly additive to the valve setting at a 1:1 ratio, providing precise control over system pressures.