SUN HYDRAULICS
RDJALAN
$392.65 USD
- SUN HYDRAULICS
- Material:RDJALAN
- Model:RDJA-LAN
- Summary:Cartridge
Quantity in stock: 0
***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 RDJALAN (RDJALAN) is a direct-acting relief cartridge designed to safeguard hydraulic components from pressure transients. This normally closed, pressure-limiting valve activates when the inlet port pressure hits its set point, opening to the tank port and throttling flow to manage pressure spikes. Known for its smooth, quiet operation, this valve is virtually leak-proof and dirt-tolerant, with a quick response time of approximately 2 milliseconds. The RDJALAN model is physically and functionally interchangeable with other two-port relief cartridges of the same frame size, making it versatile for various applications. It can handle maximum pressure at port 2, making it suitable for cross-port relief circuits and load-holding applications. The valve's adjust screw seals are exposed to system pressure; thus, adjustments require depressurization. For optimal performance and repeatability, select a spring range where the desired relief setting is mid-to-high within the minimum and maximum pressures. The valve remains stable across varying oil temperatures and contamination levels. With EPDM seals available for phosphate ester fluid systems, these cartridges are not compatible with petroleum-based fluids or greases. Featuring Sun's floating style construction, this design minimizes internal part binding due to installation torque or machining variations. Key specifications include a cavity type of T-18A Series 4 with a capacity of 200 gpm (760 L/min) and a maximum operating pressure of 5000 psi (350 bar). The valve exhibits minimal leakage at reseat\u201410 drops/min\u2014and reseats at 90% of its setting. Installation requires specific torque values: 350-375 lbf ft (474-508 Nm) for the valve body and 80-90 lbf in (9-10 Nm) for the locknut. Additional components include a Viton seal kit (990318006), ensuring compatibility with various applications while maintaining robust performance characteristics.
The Sun Hydraulics RDJALAN (RDJALAN) is a direct-acting relief cartridge designed to safeguard hydraulic components from pressure transients. This normally closed, pressure-limiting valve activates when the inlet port pressure hits its set point, opening to the tank port and throttling flow to manage pressure spikes. Known for its smooth, quiet operation, this valve is virtually leak-proof and dirt-tolerant, with a quick response time of approximately 2 milliseconds. The RDJALAN model is physically and functionally interchangeable with other two-port relief cartridges of the same frame size, making it versatile for various applications. It can handle maximum pressure at port 2, making it suitable for cross-port relief circuits and load-holding applications. The valve's adjust screw seals are exposed to system pressure; thus, adjustments require depressurization. For optimal performance and repeatability, select a spring range where the desired relief setting is mid-to-high within the minimum and maximum pressures. The valve remains stable across varying oil temperatures and contamination levels. With EPDM seals available for phosphate ester fluid systems, these cartridges are not compatible with petroleum-based fluids or greases. Featuring Sun's floating style construction, this design minimizes internal part binding due to installation torque or machining variations. Key specifications include a cavity type of T-18A Series 4 with a capacity of 200 gpm (760 L/min) and a maximum operating pressure of 5000 psi (350 bar). The valve exhibits minimal leakage at reseat\u201410 drops/min\u2014and reseats at 90% of its setting. Installation requires specific torque values: 350-375 lbf ft (474-508 Nm) for the valve body and 80-90 lbf in (9-10 Nm) for the locknut. Additional components include a Viton seal kit (990318006), ensuring compatibility with various applications while maintaining robust performance characteristics.
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.
- All 2-port relief cartridges (except pilot reliefs) are physically and functionally interchangeable (same flow path, same cavity for a given frame size).
- Will accept maximum pressure at port 2; suitable for use in cross port relief circuits.
- 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.
- Valve is relatively insensitive to varying oil temperatures and oil borne contamination.
- 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.
- Suitable for use in load holding applications.
- Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
- 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-18A |
| Series | 4 |
| Capacity | 200 gpm760 L/min. |
| Factory Pressure Settings Established at | 4 gpm15 L/min. |
| Maximum Operating Pressure | 5000 psi350 bar |
| Response Time - Typical | 2 ms2 ms |
| Maximum Valve Leakage at Reseat | 10 drops/min.0,7 cc/min. |
| Reseat | >90% of setting>90% of setting |
| Adjustment - Number of Clockwise Turns to Increase Setting | 55 |
| Valve Hex Size | 1 5/8 in.41,3 mm |
| Valve Installation Torque | 350 - 375 lbf ft474 - 508 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 | 3.30 lb1,50 kg |
| Seal kit - Cartridge | Viton: 990-318-006 |
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Additional Resources
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- QuickDesign with SmartConnect Offers Drag-and-Drop Schematic Tool
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- CE/TÜV Certified Pressure Relief Valves
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- Pilot Operated, Balanced Poppet Relief Valves
- Sun Expands Corrosion-Resistant Solutions
- Pressure Relief and Regulating Valves
- Manufacturing Sun Cartridge Cavities
- Performance Data
- 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
Notes:
- U.S. Patent #4,742,846; European Patent Pending