SUN HYDRAULICS
RDHALSV
$183.40 USD
- SUN HYDRAULICS
- Material:RDHALSV
- Model:RDHA-LSV
- 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 RDHALSV (Material Number: RDHALSV) is a direct-acting relief cartridge valve designed to protect hydraulic systems from pressure transients by limiting pressure rise. It operates by opening to tank port 2 when the inlet port 1 reaches a set pressure, throttling flow to maintain safe pressure levels. This valve is known for its smooth operation, zero leakage, dirt tolerance, and rapid response time of typically 2 milliseconds. It features a floating style construction that minimizes internal binding due to installation torque or machining variations. The RDHALSV can handle a maximum operating pressure of 5000 psi (350 bar) and has a capacity of 100 gpm (380 L/min). It is suitable for use in cross-port relief circuits and load-holding applications, accepting maximum pressure at port 2 with backpressure directly additive to the valve setting in a 1:1 ratio. The adjustment screw seals are exposed to system pressure, requiring the system to be depressurized before adjustments can be made. The valve's performance remains stable despite changes in oil temperature or contamination levels. For optimal repeatability, select a spring range where the desired relief setting falls between midrange and high within the minimum and maximum limits. Installation requires specific torques: 150-160 lbf ft (203-217 Nm) for the valve installation and 80-90 lbf in (9-10 Nm) for the locknut. The adjustment screw has an internal hex size of 5/32 inches (4 mm), while the locknut hex size is 9/16 inches (15 mm). This model weighs approximately 1.30 lb (0.60 kg) and utilizes Viton seals with part number 990316006 for maintenance or replacement needs.
The Sun Hydraulics RDHALSV (Material Number: RDHALSV) is a direct-acting relief cartridge valve designed to protect hydraulic systems from pressure transients by limiting pressure rise. It operates by opening to tank port 2 when the inlet port 1 reaches a set pressure, throttling flow to maintain safe pressure levels. This valve is known for its smooth operation, zero leakage, dirt tolerance, and rapid response time of typically 2 milliseconds. It features a floating style construction that minimizes internal binding due to installation torque or machining variations. The RDHALSV can handle a maximum operating pressure of 5000 psi (350 bar) and has a capacity of 100 gpm (380 L/min). It is suitable for use in cross-port relief circuits and load-holding applications, accepting maximum pressure at port 2 with backpressure directly additive to the valve setting in a 1:1 ratio. The adjustment screw seals are exposed to system pressure, requiring the system to be depressurized before adjustments can be made. The valve's performance remains stable despite changes in oil temperature or contamination levels. For optimal repeatability, select a spring range where the desired relief setting falls between midrange and high within the minimum and maximum limits. Installation requires specific torques: 150-160 lbf ft (203-217 Nm) for the valve installation and 80-90 lbf in (9-10 Nm) for the locknut. The adjustment screw has an internal hex size of 5/32 inches (4 mm), while the locknut hex size is 9/16 inches (15 mm). This model weighs approximately 1.30 lb (0.60 kg) and utilizes Viton seals with part number 990316006 for maintenance or replacement needs.
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.
- 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-16A |
| Series | 3 |
| Capacity | 100 gpm380 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 | 66 |
| Valve Hex Size | 1 1/4 in.31,8 mm |
| Valve Installation Torque | 150 - 160 lbf ft203 - 217 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 | 1.30 lb0,60 kg |
| Seal kit - Cartridge | Viton: 990-316-006 |
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Notes:
- U.S. Patent #4,742,846; European Patent Pending
