SUN HYDRAULICS
RDJALDN/LH
$427.50 USD
Tags:
- SUN HYDRAULICS
- Material:RDJALDN/LH
- Model:RDJA-LDN/LH
- 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/LH (Material Number: RDJALDN/LH) is a direct-acting relief cartridge designed to safeguard hydraulic components from pressure spikes. 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 limit pressure increases. Known for its smooth and quiet operation, this valve exhibits near-zero leakage and is highly resistant to dirt and silting, ensuring rapid response times. Its design allows for interchangeability with other 2-port relief cartridges of the same frame size, facilitating easy integration into existing systems. The valve can handle maximum pressure at port 2, making it suitable for cross-port relief circuits and load-holding applications. Adjustment of the valve requires system pressure removal due to the exposure of adjust screw seals to system pressure. It is recommended to select a spring range where the desired setting falls within mid-to-high range for optimal repeatability. The valve's backpressure on tank port 2 adds directly to the setting at a 1:1 ratio, impacting overall performance. It features Sun's floating style construction that minimizes internal binding risks during installation. The RDJALDN/LH supports a capacity of up to 200 gpm (760 L/min) with a maximum operating pressure of 5000 psi (350 bar). It has a typical response time of 2 milliseconds and reseats at 90% of its set value with minimal leakage. The valve\u2019s installation torque ranges from 350-375 lbf-ft (474-508 Nm), with various adjustment and locknut specifications provided for precise tuning. For systems using phosphate ester fluids, EPDM seal configurations are available but should not be exposed to petroleum-based substances.
The Sun Hydraulics RDJALDN/LH (Material Number: RDJALDN/LH) is a direct-acting relief cartridge designed to safeguard hydraulic components from pressure spikes. 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 limit pressure increases. Known for its smooth and quiet operation, this valve exhibits near-zero leakage and is highly resistant to dirt and silting, ensuring rapid response times. Its design allows for interchangeability with other 2-port relief cartridges of the same frame size, facilitating easy integration into existing systems. The valve can handle maximum pressure at port 2, making it suitable for cross-port relief circuits and load-holding applications. Adjustment of the valve requires system pressure removal due to the exposure of adjust screw seals to system pressure. It is recommended to select a spring range where the desired setting falls within mid-to-high range for optimal repeatability. The valve's backpressure on tank port 2 adds directly to the setting at a 1:1 ratio, impacting overall performance. It features Sun's floating style construction that minimizes internal binding risks during installation. The RDJALDN/LH supports a capacity of up to 200 gpm (760 L/min) with a maximum operating pressure of 5000 psi (350 bar). It has a typical response time of 2 milliseconds and reseats at 90% of its set value with minimal leakage. The valve\u2019s installation torque ranges from 350-375 lbf-ft (474-508 Nm), with various adjustment and locknut specifications provided for precise tuning. For systems using phosphate ester fluids, EPDM seal configurations are available but should not be exposed to petroleum-based substances.
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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- 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