SUN HYDRAULICS
RBFALWV

***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 RBFALWV (RBFALWV) is a bidirectional, direct-acting relief cartridge designed as a normally closed, pressure-limiting valve to protect hydraulic components from pressure transients. It operates by opening and throttling flow when the pressure differential between ports 1 and 2 surpasses the valve setting, effectively limiting pressure rise in both directions with similar performance. The valve's design ensures immunity to cavitation-related issues such as noise and manifold erosion. Adjustments can be made at port 2 or when pressure is removed from port 1, following a specific setting procedure. The valve demonstrates insensitivity to varying oil temperatures and contamination, enhancing reliability. To ensure maximum repeatability, it is recommended to select a spring range where the desired relief setting falls between midrange to high of the minimum and maximum pressures. This valve features Sun\u2019s floating style construction, minimizing potential internal binding due to excessive installation torque or machining variations. It fits into cavity T-3A Series 2 with a capacity of 30 gpm (120 L/min) and operates at a maximum pressure of 5000 psi (350 bar). The response time is typically around 2 ms, with maximum leakage at reseat being 30 drops per minute and reseating at 85% of the set value. Hysteresis is maintained at approximately 3%, with adjustments requiring up to five clockwise turns for increased settings. The RBFALWV incorporates Viton seals (seal kit: 990303006) for durability under various conditions. Its hex size measures 1-1/8 inches (28.6 mm), with an installation torque range between 45-50 lbf-ft (61-68 Nm). This relief cartridge offers functional interchangeability across all two-port relief cartridges except pilot reliefs within its frame size, providing versatile application options in hydraulic systems requiring robust overpressure protection solutions.