SUN HYDRAULICS
RSBCLBN

***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 RSBCLBN (RSBCLBN) is a pilot-operated, balanced piston sequence valve designed to supply a secondary circuit with flow once the pressure at inlet port 1 exceeds the valve setting. This valve controls the pressure at port 1 relative to the drain port 3 and remains unaffected by back pressure at port 2, up to the valve setting. It is suitable for regulating pressure instead of using two-port relief valves when there is return line pressure. The RSBCLBN model belongs to a series where all three-port sequence cartridges are interchangeable in terms of flow path and cavity size. The main stage orifice is safeguarded by a 150-micron stainless steel screen, and it features a minimum setting of 75 psi (5 bar) for all spring ranges. The maximum operating pressure is rated at 5000 psi (350 bar), with a typical response time of 10 ms and maximum leakage of 2 in\u00b3/min (30 cc/min) at 110 SUS (24 cSt). This valve incorporates Sun's floating style construction to minimize binding risks due to excessive installation torque or cavity machining variations. Cartridges with EPDM seals are compatible with phosphate ester fluids but can be damaged by petroleum-based substances. The RSBCLBN model has a capacity of 7.5 gpm (30 L/min), uses an adjustment screw internal hex size of 5/32 in. (4 mm), and requires an installation torque between 20-25 lbf ft (27-33 Nm). The locknut hex size is set at 9/16 in. (15 mm) with a torque requirement of 80-90 lbf in. (9-10 Nm). This model weighs approximately .30 lb (.15 kg) and includes a Viton seal kit under part number 990163006, ensuring reliable performance across various applications requiring precise pressure control without load holding capabilities due to spool leakage concerns.