SUN HYDRAULICS
RPGECCN

***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 RPGECCN (Material Number: RPGECCN) 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 relieve excess pressure by throttling flow when the inlet port reaches the set pressure, directing it to the tank port. The RPGECCN is notable for its low pressure rise versus flow and quick response time of approximately 2 milliseconds. It is suitable for cross-port relief circuits but should not be used in load-holding applications due to spool leakage. The valve features a main stage orifice protected by a 150-micron stainless steel screen and incorporates Sun's floating style construction to reduce internal binding risks due to installation torque or machining variations. The cartridge operates with a maximum capacity of 50 gpm (200 L/min) and can withstand pressures up to 5000 psi (350 bar). Back pressure at the tank port directly affects the valve setting at a 1:1 ratio. For systems utilizing phosphate ester fluids, cartridges configured with EPDM seals are recommended; exposure to petroleum-based fluids can damage these seals. Installation specifics include a valve hex size of 1 1/8 inches (28.6 mm), requiring an installation torque of 45-50 lbf ft (61-68 Nm), and adjustment made via an internal hex screw with five clockwise turns increasing the setting. The model weighs approximately .50 lb (0.25 kg) and comes with a Viton seal kit option under part number 990203006.