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Direct-acting relief valve Capacity: 12 gpm (45 L/min.) Functional Group: Products : Cartridges : Relief : 2 Port : Direct Acting Model: RDBA-LAN Product Description Direct-acting relief cartridges are normally closed, pressure-limiting valves used to protect hydraulic components from pressure transients. When the pressure at the inlet (port 1) reaches the valve setting, the valve starts to open to tank (port 2), throttling flow to limit the pressure rise. These valves are smooth and quiet, essentially zero leak, dirt tolerant, immune to silting and are very fast. Technical Features All 2-port relief cartridges (except pilot reliefs) are physically and functionally interchangeable (same flow path, same cavity for a given frame size). Select a spring range where the desired relief setting is approximately mid-range to high between the minimum and maximum pressure to ensure maximum valve repeatability. Will accept maximum pressure at port 2; suitable for use in cross port relief circuits. Suitable for use in load holding applications. The seals on the adjust screw are exposed to system pressure which means this valve can only be adjusted when the pressure is removed. The setting procedure is; check the setting, remove the pressure, adjust the valve, check the new setting. Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio. Valve is relatively insensitive to varying oil temperatures and oil borne contamination. 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. Special Notes U.S. Patent #4,742,846; European Patent Pending Technical Data U.S. Units Metric UnitsCavity T-162ACapacity 12 gpm 45 L/min.Factory Pressure Settings Established at 4 gpm 15 L/min.Maximum Operating Pressure 5000 psi 350 barMaximum Valve Leakage at Reseat 10 drops/min. 0,7 cc/min.Response Time - Typical 2 msSeries (from Cavity) Series 0Reseat >90 % of Set Pressure Adjustment - Number of Clockwise Turns to Increase Setting 5 DownloadValve Hex Size 3/4 in. 19,1 mmValve Installation Torque 20 - 25 lbf ft 27 - 33 NmAdjustment Screw Internal Hex Size 5/32 in. 4 mmAdjustment Locknut/Cap Hex Size 9/16 in. 15 mmAdjustment Nut Torque 80 - 90 lbf in. 9 - 10 NmSeal Kits - Cartridge Buna: 990-162-007 Seal Kits - Cartridge Viton: 990-162-006 Model Weight 0.22 lb. 0.10 kg. RDBA-LAN $35.80 Recommended List Price Control Adjustment Range Seal Material Material/Coating Modifier L Standard Screw Adjustment +0.00 A 500 - 3000 psi (35 - 210 bar), 1000 psi (70 bar) Standard Setting +0.00 N Buna-N +0.00 /AP Stainless Steel, Passivated Control:L +143.20 Our corrosion resistant product line is growing! If you are interested in a corrosion resistant option for this model, please contact Sun. When the control is F, the range must be A,B,E or WWhen the modifier is /AP, the control must be C or L Customer specified setting stamped on hex $ 2.00 Related Documents (opens in new window): Explanation of Sun cartridge control options - US units. Explanation of Sun cartridge control options - metric units. Two-piece, floating cartridge construction.Copyright © 2002-2011 Sun Hydraulics Corporation. All rights reserved.Terms and Conditions - ISO Certification - Statement of


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U of M ME 4232 - Direct-acting relief valve

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