SUN HYDRAULICS
RPGEFKN

***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 RPGEFKN (RPGEFKN) is a fast-acting, pilot-operated, balanced piston relief cartridge designed to protect hydraulic components from pressure transients. These normally closed, pressure-limiting valves open quickly and close rapidly, prioritizing speed over smoothness. When the inlet port pressure reaches the valve setting, it begins to open towards the tank port, throttling flow to limit any further pressure increase. Notably, these valves offer low pressure rise versus flow and operate with remarkable speed. They are physically and functionally interchangeable with all other two-port relief cartridges of the same frame size, except for pilot reliefs. The RPGEFKN can handle maximum pressure at port 2 and is suitable for use in cross-port relief circuits; however, spool leakage should be considered in such applications. The main stage orifice is safeguarded by a 150-micron stainless steel screen. This product is not recommended for load-holding applications due to potential spool leakage issues. Back pressure on the tank port directly adds to the valve setting at a 1:1 ratio. Cartridges equipped with EPDM seals are suitable for systems using phosphate ester fluids but can be damaged by petroleum-based fluids or lubricants. The valve incorporates Sun's floating style construction to reduce internal part binding caused by excessive installation torque or machining variations. The RPGEFKN features a T-3A cavity series with a capacity of 50 gpm (200 L/min) and operates at a maximum pressure of 5000 psi (350 bar). It has an impressive response time of approximately 2 milliseconds and minimal leakage at specified conditions. The valve's adjustable settings allow for increased precision in hydraulic systems, making it an essential component for maintaining system integrity under varying pressures.