SUN HYDRAULICS
RPGEFBN

***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 RPGEFBN (Material Number: RPGEFBN) 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 when the inlet port pressure reaches its set point, diverting flow to the tank port and limiting further pressure increase. The RPGEFBN model features low pressure rise versus flow and operates with exceptional speed, making it suitable for applications where rapid response is critical. It is interchangeable with other 2-port relief cartridges of the same frame size, offering flexibility in system design. This cartridge can handle maximum pressure at port 2, making it appropriate for cross port relief circuits; however, spool leakage should be considered in such configurations. The main stage orifice is safeguarded by a 150-micron stainless steel screen. Due to spool leakage, this valve is not recommended for load-holding applications. Back pressure on the tank port adds directly to the valve setting at a 1:1 ratio. The RPGEFBN incorporates Sun's floating style construction to minimize internal part binding due to installation torque or machining variations. It supports systems using phosphate ester fluids when configured with EPDM seals but should not be exposed to petroleum-based fluids which can damage these seals. Key specifications include a capacity of 50 gpm (200 L/min), a maximum operating pressure of 5000 psi (350 bar), and typical response time of 2 ms. The valve has a maximum leakage rate of 3 in\u00b3/min at 1000 psi (50 cc/min at 70 bar) and features an adjustable setting with five clockwise turns required for increasing the setting. Its compact design requires specific installation torques for optimal performance and includes options for corrosion-resistant plating.