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Sun Hydraulics RBAECEV/AP 溢流阀

RBAECEV/AP - Direct-acting relief valve - pilot capacity

Sun Hydraulics

Two-port, pilot-stage, direct-acting relief cartridges are fully adjustable, normally closed pressure regulating valves. When the pressure at port 1 (inlet) is sufficient to overcome the spring force (valve setting), a flow path is opened from port 1 to port 2 (tank). Utilizes the Sun T-8A 2-port cavity making it the ideal choice to use in conjunction with Sun's main stage pilot or vent-to-operate cartridges. Separate pilot lines are eliminated and only one cavity needs to be machined to accommodate both the control and primary function. Note: All 2-position, 2-way pilot stage control cartridges utilize the same cavity and are physically interchangeable. Functionality is the only consideration. Note: The main stage valve should first be installed to the correct torque value followed by the T-8A pilot control section into the main stage valve to its required torque value. Ports 1 and 2 may be pressured to 5000 psi (350 bar). Hardened poppet and seat provide consistent operation, low leakage rates and superior wear characteristics. Backpressure at port 2 (outlet) is directly additive to the pressure setting at port 1 (inlet). Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals. Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations. Cavity T-8A Series P Capacity 2.5 gpm10 L/min. Factory Pressure Settings Established at 2 in³/min.30 cc/min. Maximum Operating Pressure 5000 psi350 bar Response Time - Typical 2 ms2 ms Maximum Valve Leakage at 110 SUS (24 cSt) 15 drops/min.1 cc/min. Valve Hex Size 7/8 in.22,2 mm Valve Installation Torque 20 - 25 lbf ft27 - 33 Nm Adjustment Screw Internal Hex Size 5/32 in.4 mm Locknut Hex Size 9/16 in.15 mm Locknut Torque 80 - 90 lbf in.9 - 10 Nm Seal kit - Cartridge Viton: 990-608-006 Show FAQ Direct acting or pilot operated - what do I use? Direct-acting valves are used to prevent over pressure, and pilot-operated valves are used to regulate pressure. If you are unsure, use a direct-acting valve. Sun's direct acting valves are very fast, dirt tolerant, stable, and robust. Sun's pilot-operated valves are moderately fast, they have a low pressure rise vs. flow curve, and they are easy to adjust. Where would I use a kick-down relief? One graphic example is on a portable grain auger for silos. When the farmer gets caught in the auger the kick-down relief trips and allows him to escape. What are the tolerances on pressure settings for Sun's pressure control valves? Pressure setting tolerances are listed in our Performance Data page. A link to this page can also be found in the Additional Resources tab of the applicable product page. How big is a drop of hydraulic oil? There are exactly 250 Sun drops in a cubic inch or 15 in a cc. Can I use a kick-down relief for my system relief? Maybe not. We build in a good amount of overlap in the kick-down reliefs to prevent false tripping. This means they are not as fast as our standard pilot-operated reliefs. A direct-acting relief valve set just above the kick-down relief valve would be good insurance. Additional Resources Pilot-Operated, Balanced Poppet, Anti Shock Reliefs CavitySaver multi-function valves deliver single-cartridge solutions 'Soft' Relief Eliminates Pressure Spikes Tri-Grip Handknob Now Offered From Sun as a Standard Control Option QuickDesign with SmartConnect Offers Drag-and-Drop Schematic Tool Sun Introduces 'Hybrid' Valves CE/TÜV Certified Pressure Relief Valves Pressure Relief and Regulating Cartridge Valve Technical Tips Pilot Operated, Balanced Poppet Relief Valves Sun Expands Corrosion-Resistant Solutions Sun Offers Zinc-Nickel Plating for Corrosion Resistance Sun Cartridges with EPDM Seals Series 4 PLUS Cartridges Offer Higher Flows with Lower Pressure Losses Manufacturing Sun Cartridge Cavities Pressure Relief and Regulating Valves Sun's Floating Style Screw-In Cartridge Units of Measure, Settings, and Conversions Cavity Information (S-171) and Tooling Sun Model Code Explanation; 999-901-334 Cartridges: Materials of Construction Fluid and Temperature Recommendations Performance Data Notes: For Series 1 cartridges configured with an O control (panel mount handknob), a .75 in. (19 mm) diameter hole is required in the panel.

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