Sun Hydraulics RVCDKAN 溢流阀-产品快照

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Sun Hydraulics RVCDKAN 溢流阀

RVCDKAN - Ventable, pilot operated, balanced piston relief valve with drain to port 4

Sun Hydraulics

Ventable, pilot-operated, balanced piston relief cartridges with external drain are normally closed pressure regulating valves. When the pressure at the inlet (port 1) reaches the valve setting, the valve starts to open to tank (port 2), throttling flow to regulate the pressure. They provide a vent port (port 3) that connects between the main piston and pilot stage to provide for remote control by other pilot or 2-way valves and a drain (port 4) that makes them insensitive to back pressure. These valves are accurate, have low pressure rise vs. flow, they are smooth and quiet, and are moderately fast. A remote pilot relief on port 3 (vent) will control the valve below its own setting. Will accept maximum pressure at port 2; suitable for use in cross port relief circuits. If used in cross port relief circuits, consider spool leakage. Main stage orifice is protected by a 150 micron stainless steel screen. Not suitable for use in load holding applications due to spool leakage. Pressure at port 4 is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar). 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. W and Y controls (where applicable) can be specified with or without a special setting. When no special setting is specified, the valve is adjustable throughout its full range using the W or Y control. When a special setting is specified, this setting represents the maximum setting of the valve. 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-21A Series 1 Capacity 15 gpm60 L/min. Factory Pressure Settings Established at 4 gpm15 L/min. Maximum Operating Pressure 5000 psi350 bar Control Pilot Flow 7 - 10 in³/min.0,11 - 0,16 L/min. Response Time - Typical 10 ms10 ms Maximum Valve Leakage at 110 SUS (24 cSt) 2 in³/min.@1000 psi30 cc/min.@70 bar Adjustment - Number of Clockwise Turns to Increase Setting 55 Valve Hex Size 7/8 in.22,2 mm Valve Installation Torque 30 - 35 lbf ft41 - 47 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 Model Weight .40 lb0,20 kg Seal kit - Cartridge Viton: 990-021-006 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 Related Files Download Download Download Download Download Download Download

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