SUN HYDRAULICS
RPIEKBN

***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 RPIEKBN (RPIEKBN) is a fast-acting, pilot-operated, balanced piston relief cartridge designed to protect hydraulic components from pressure transients. This normally closed, pressure-limiting valve opens rapidly to tank port 2 once the inlet port 1 reaches the preset pressure, effectively throttling flow to manage pressure increases. It is characterized by a low-pressure rise versus flow and offers swift response times, typically around 2 milliseconds. The RPIEKBN model is interchangeable with other 2-port relief cartridges of the same frame size, making it versatile in various applications. It can handle maximum pressures at port 2 and is suitable for cross-port relief circuits; however, users should be aware of potential spool leakage in such configurations. The valve\u2019s main stage orifice is safeguarded by a 150-micron stainless steel screen, though it is not recommended for load-holding applications due to potential leakage. Back pressure on tank port 2 adds directly to the valve setting at a 1:1 ratio. The unit features Sun's floating style construction to reduce risks of internal part binding from excessive torque or machining variations. It fits into Cavity T-16A/Series 3 and has a capacity of up to 100 gpm (380 L/min). The factory pressure settings are established at 4 gpm (15 L/min), with a maximum operating pressure of up to 5000 psi (350 bar). Valve leakage at maximum conditions is minimal at approximately 4 in\u00b3/min (65 cc/min). Installation requires specific torques: valve installation torque ranges between 150-160 lbf\u00b7ft (203-217 Nm) and locknut torque between 80-90 lbf\u00b7in (9-10 Nm). The model weighs approximately 1.20 lb (0.55 kg) and uses Viton seal kits for optimal performance and durability.