SUN HYDRAULICS
RPGEJUN

***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 RPGEJUN (RPGEJUN) 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 to the tank port when the inlet pressure reaches the set threshold, effectively throttling flow to control the pressure rise. Notably, it offers low pressure rise versus flow and operates with remarkable speed, making it suitable for applications where rapid response is crucial. The RPGEJUN model ensures physical and functional interchangeability with other 2-port relief cartridges of similar frame size, sharing the same cavity and flow path. It can handle maximum pressure at port 2, making it ideal for cross-port relief circuits; however, spool leakage should be considered in such applications. The valve's main stage orifice is shielded by a 150-micron stainless steel screen to enhance durability and performance. It is important to note that this cartridge is not recommended for load-holding applications due to potential spool leakage. Additionally, back pressure on the tank port directly influences the valve setting at a 1:1 ratio. For systems using phosphate ester fluids, EPDM seal configurations are available but should not be exposed to petroleum-based substances as they may cause damage. The RPGEJUN incorporates Sun's floating style construction to reduce internal part binding risks associated with excessive installation torque or cavity/cartridge machining variations. With a capacity of 50 gpm (200 L/min) and a maximum operating pressure of 5000 psi (350 bar), this cartridge provides reliable performance under demanding conditions. Its typical response time is approximately 2 milliseconds, ensuring quick adaptation to pressure changes. The model features an adjustment range accessible via an internal hex screw and locknut system for precise control over settings.