SUN HYDRAULICS
RPIELBN

***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 RPIELBN (RPIELBN) is a fast-acting, pilot-operated, balanced piston relief cartridge designed for hydraulic systems. This normally closed, pressure-limiting valve is engineered to protect hydraulic components from pressure transients by opening rapidly when the inlet port pressure reaches the valve setting, directing flow to the tank port to limit pressure rise. It features a low pressure rise versus flow and offers exceptionally quick response times. Designed with a 150-micron stainless steel screen to protect the main stage orifice, this cartridge is not suitable for load holding applications due to spool leakage. It can handle maximum operating pressures of up to 5000 psi and allows back pressure on the tank port to be directly additive to the valve setting at a 1:1 ratio. The Sun floating style construction minimizes internal part binding due to excessive installation torque or machining variations. The RPIELBN is interchangeable with other 2-port relief cartridges except for pilot reliefs, making it versatile for various applications such as cross-port relief circuits, though spool leakage should be considered in such uses. This model has a cavity size of T-16A, series 3, and can handle capacities up to 100 gpm (380 L/min). It requires an installation torque of 150-160 lbf ft and includes adjustments like a number of clockwise turns for setting increases and specific hex sizes for adjustment screws and locknuts. The cartridge weighs approximately 1.20 lb (0.55 kg) and comes with a Viton seal kit option (990016006).