SUN HYDRAULICS
RPGEMEN

***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 RPGEMEN (RPGEMEN) is a fast-acting, pilot-operated, balanced piston relief cartridge designed to protect hydraulic components from pressure transients. This normally closed, pressure-limiting valve features rapid opening and closing capabilities, although this comes at the cost of smoothness. When the inlet port 1 pressure reaches the valve's set threshold, it begins to open towards tank port 2, throttling flow to limit any further pressure increase. The cartridge is noted for its low pressure rise versus flow and quick response time, typically around 2 milliseconds. It can handle a maximum operating pressure of 5000 psi (350 bar) and has a capacity of up to 50 gpm (200 L/min). The RPGEMEN is compatible with cross-port relief circuits but requires consideration of spool leakage if used in such applications. Its main stage orifice is protected by a 150-micron stainless steel screen and it incorporates Sun\u2019s floating style construction to reduce internal binding risks due to installation torque or machining variations. However, this valve is not suitable for load-holding applications due to potential spool leakage. Additionally, cartridges configured with EPDM seals are intended for systems using phosphate ester fluids; exposure to petroleum-based fluids can damage these seals. The design allows for interchangeable use among all two-port relief cartridges except pilot reliefs within the same series frame size. The back pressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. For installation and adjustment, it requires specific torques and hex sizes as outlined in its specifications.