SUN HYDRAULICS
RDJALDN
$394.64 USD
- SUN HYDRAULICS
- Material:RDJALDN
- Model:RDJA-LDN
- 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 RDJALDN (RDJALDN) is a direct-acting relief cartridge designed to provide reliable pressure protection for hydraulic systems. This normally closed, pressure-limiting valve opens to tank port 2 when the inlet port 1 pressure reaches the set threshold, effectively throttling flow to control pressure spikes. Known for its smooth and quiet operation, the RDJALDN boasts an essentially zero-leak design that is dirt tolerant and immune to silting, ensuring rapid response times of approximately 2 milliseconds. The valve is interchangeable with other 2-port relief cartridges of the same frame size, making it versatile for various hydraulic applications. The RDJALDN can handle a maximum operating pressure of 5000 psi (350 bar) and supports a flow capacity of up to 200 gpm (760 L/min). It features a robust construction with seals on the adjust screw exposed to system pressure, necessitating adjustment only when the system is depressurized. The valve's performance remains stable across varying oil temperatures and contamination levels, making it suitable for load-holding applications. Back pressure at port 2 directly affects the valve setting at a 1:1 ratio. This model incorporates Sun's floating style construction to reduce internal binding risks due to excessive torque or machining variations. The RDJALDN is compatible with EPDM seals for systems using phosphate ester fluids but should not be exposed to petroleum-based substances. Its installation requires specific torque settings: valve installation torque ranges from 350 to 375 lbf ft (474 to 508 Nm), while locknut torque is between 80 and 90 lbf in (9 to 10 Nm). The adjustment screw has an internal hex size of 5/32 inches (4 mm), facilitating precise setting adjustments.
The Sun Hydraulics RDJALDN (RDJALDN) is a direct-acting relief cartridge designed to provide reliable pressure protection for hydraulic systems. This normally closed, pressure-limiting valve opens to tank port 2 when the inlet port 1 pressure reaches the set threshold, effectively throttling flow to control pressure spikes. Known for its smooth and quiet operation, the RDJALDN boasts an essentially zero-leak design that is dirt tolerant and immune to silting, ensuring rapid response times of approximately 2 milliseconds. The valve is interchangeable with other 2-port relief cartridges of the same frame size, making it versatile for various hydraulic applications. The RDJALDN can handle a maximum operating pressure of 5000 psi (350 bar) and supports a flow capacity of up to 200 gpm (760 L/min). It features a robust construction with seals on the adjust screw exposed to system pressure, necessitating adjustment only when the system is depressurized. The valve's performance remains stable across varying oil temperatures and contamination levels, making it suitable for load-holding applications. Back pressure at port 2 directly affects the valve setting at a 1:1 ratio. This model incorporates Sun's floating style construction to reduce internal binding risks due to excessive torque or machining variations. The RDJALDN is compatible with EPDM seals for systems using phosphate ester fluids but should not be exposed to petroleum-based substances. Its installation requires specific torque settings: valve installation torque ranges from 350 to 375 lbf ft (474 to 508 Nm), while locknut torque is between 80 and 90 lbf in (9 to 10 Nm). The adjustment screw has an internal hex size of 5/32 inches (4 mm), facilitating precise setting adjustments.
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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- 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