SUN HYDRAULICS
RPEEJAN

***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 RPEEJAN (RPEEJAN) is a fast-acting, pilot-operated, balanced piston relief cartridge designed for pressure-limiting applications to safeguard hydraulic components from pressure surges. This normally closed valve opens swiftly when the inlet port pressure reaches the preset level, diverting flow to the tank port to manage pressure escalation. It features low pressure rise versus flow and rapid response times, making it highly effective in dynamic environments. The RPEEJAN is suitable for cross port relief circuits but requires consideration of spool leakage. It incorporates a 150-micron stainless steel screen protecting the main stage orifice and is not recommended for load holding due to potential leakage. The back pressure at tank port 2 directly adds to the valve setting at a 1:1 ratio. This model is compatible with other 2-port relief cartridges of similar frame size for both physical and functional interchangeability. The valve supports W and Y control adjustments across its entire range unless a specific setting is defined, which then becomes the maximum setting. The Sun floating style construction minimizes internal binding risks due to installation torque or machining variations. With a capacity of 25 gpm (95 L/min), it can handle up to a maximum operating pressure of 5000 psi (350 bar). Its typical response time is approximately 2 milliseconds, with minimal valve leakage at standard conditions. Installation specifications include a valve hex size of 7/8 inch (22.2 mm) and installation torque between 30-35 lbf ft (41-47 Nm). The adjustment screw has an internal hex size of 5/32 inch (4 mm), while the locknut requires a hex size of 9/16 inch (15 mm) with torque settings between 80-90 lbf in (9-10 Nm). The unit weighs approximately .30 lb (.15 kg) and uses Viton seal kits like part number 990010006 for maintenance or replacement needs.