SUN HYDRAULICS
RPGEMAN

***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 RPGEMAN (Material Number: RPGEMAN) is a fast-acting, pilot-operated, balanced piston relief cartridge designed to protect hydraulic components from pressure transients by limiting pressure rise through rapid opening and closing. These valves are normally closed and open when the inlet port pressure reaches the valve setting, directing flow to the tank port to manage pressure levels. Known for their low pressure rise versus flow characteristics, these cartridges feature a maximum operating pressure of 5000 psi (350 bar) and a typical response time of 2 milliseconds. The valve's main stage orifice is safeguarded by a 150-micron stainless steel screen. Notably interchangeable with other 2-port relief cartridges of the same frame size, they are suitable for cross-port relief circuits with consideration for spool leakage. However, they are not recommended for load-holding applications due to this leakage aspect. The back pressure at the tank port is directly additive to the valve setting at a 1:1 ratio. Cartridges equipped with EPDM seals are specifically intended for systems using phosphate ester fluids and should not be exposed to petroleum-based fluids or lubricants. The RPGEMAN model incorporates Sun's floating style construction, which helps prevent internal part binding from excessive torque or machining variations during installation. Key specifications include a capacity of 50 gpm (200 L/min), factory pressure settings established at 4 gpm (15 L/min), and maximum valve leakage of 3 in\u00b3/min (50 cc/min) at 1000 psi (70 bar). The valve requires an installation torque between 45 - 50 lbf ft (61 - 68 Nm), comes with an adjustment screw internal hex size of 5/32 in., and locknut hex size of 9/16 in., requiring torque between 80 - 90 lbf in.