SUN HYDRAULICS
RVIBKBN

***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 RVIBKBN (RVIBKBN) is a versatile hydraulic component designed as a three-port normally closed modulating element with relief capabilities. This model is engineered to provide dual functions when used in conjunction with an external orifice. Primarily, it operates as a bypass compensator, regulating a priority flow into the circuit while diverting any excess input flow to tank port 2. Additionally, if the pressure at inlet port 1 exceeds the valve's preset threshold, it functions as a standard relief valve. The compensating pressure across all ranges is set at 90 psi (6 bar). The performance curve of this valve illustrates that its capacity and performance are determined by bypass flow rather than control flow, with system pressure displayed on the X-axis and pressure differential across the control orifice on the Y-axis. The RVIBKBN model is suitable for systems using phosphate ester fluids when equipped with EPDM seals; however, these seals are susceptible to damage from petroleum-based fluids. The valve features a T-19A cavity and offers a capacity of up to 80 gpm (320 L/min). It can withstand a maximum operating pressure of 5000 psi (350 bar) and typically responds within 10 milliseconds. Maximum valve leakage at 110 SUS (24 cSt) is limited to 5 in\u00b3/min (80 cc/min) at 1000 psi (70 bar). For adjustment purposes, increasing the setting requires approximately five clockwise turns. Installation specifics include a valve hex size of 1-5/8 inches (41.3 mm) and an installation torque between 350 and 375 lbf-ft (474 to 508 Nm). The adjustment screw has an internal hex size of 5/32 inches (4 mm), while the locknut has a hex size of 9/16 inches (15 mm), requiring torque between 80 and 90 lbf-in (9 to 10 Nm). The model weighs approximately 3.10 lb (1.40 kg) and uses Viton seal kits identified by part number: 990019006.