SUN HYDRAULICS
RELIEF CART
RPGDABN

***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 RPGDABN (RPGDABN) is an air-controlled, pilot-operated, balanced piston relief cartridge designed for precise pressure regulation in hydraulic systems. It utilizes compressed air over a diaphragm to control the pressure setting, offering an alternative to traditional adjustable spring mechanisms. This normally closed pressure regulating valve begins to open when the inlet port 1 reaches the designated valve setting, directing flow to tank port 2 and effectively managing pressure levels. Notable for its accuracy and low-pressure rise versus flow characteristics, this valve operates smoothly and quietly with moderate speed. The RPGDABN is suitable for cross-port relief circuits and can handle maximum pressures at port 2 without issue. The maximum permissible air pressure should not exceed 150 psi (10 bar). Its design ensures interchangeability across all 2-port relief cartridges, except pilot reliefs, maintaining consistent flow paths and cavity dimensions for a given frame size. The incorporation of Sun's floating style construction minimizes potential internal part binding due to excessive torque or machining variations. Additional specifications include a T-3A cavity, Series 2 capacity of 50 gpm (200 L/min), a pilot ratio of 20:1, and a maximum operating pressure of 2000 psi (140 bar). The typical response time is approximately 10 ms with minimal leakage at specified conditions. The cartridge features a hex size of 1-1/8 inches (28.6 mm) and requires an installation torque between 45-50 lbf-ft (61-68 Nm). Weighing in at .50 lb (.25 kg), it also supports Viton seal kits for reliable performance in demanding environments.