SUN HYDRAULICS
RELIEF CART
RDBALAN
- SUN HYDRAULICS
- Material:RDBALAN
- Model:RDBA-LAN
- Summary:Cartridge
Due to extremely high demand, please call 888-905-7411 for availability
***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 RDBALAN (RDBALAN) is a direct-acting relief cartridge designed to protect hydraulic components from pressure transients by functioning as a normally closed, pressure-limiting valve. When the inlet port 1 reaches the set pressure, the valve opens to tank port 2, throttling flow to limit the pressure rise. This model is known for its smooth and quiet operation, zero leakage, dirt tolerance, and rapid response. It features physical and functional interchangeability with other two-port relief cartridges of the same frame size, making it versatile for various applications including cross-port relief circuits and load holding applications. The valve can withstand maximum pressure at port 2 and requires system pressure removal for adjustment due to exposed seals on the adjust screw. It is relatively insensitive to oil temperature variations and contamination. For optimal performance, it is recommended to select a spring range where the desired relief setting is midrange to high between minimum and maximum pressures. The RDBALAN incorporates Sun's floating style construction to minimize internal part binding due to installation torque or machining variations. It has a capacity of 12 gpm (45 L/min), a maximum operating pressure of 5000 psi (350 bar), and typical response time of 2 ms. Maximum valve leakage at reseat is minimal at 10 drops/min (0.7 cc/min), with reseat occurring at 85% of the setting. The valve features an adjustment screw internal hex size of 5/32 in (4 mm) and requires an installation torque of 20\u201325 lbf ft (27\u201333 Nm). EPDM seals are available for systems using phosphate ester fluids; however, exposure to petroleum-based fluids can damage these seals.
The Sun Hydraulics RDBALAN (RDBALAN) is a direct-acting relief cartridge designed to protect hydraulic components from pressure transients by functioning as a normally closed, pressure-limiting valve. When the inlet port 1 reaches the set pressure, the valve opens to tank port 2, throttling flow to limit the pressure rise. This model is known for its smooth and quiet operation, zero leakage, dirt tolerance, and rapid response. It features physical and functional interchangeability with other two-port relief cartridges of the same frame size, making it versatile for various applications including cross-port relief circuits and load holding applications. The valve can withstand maximum pressure at port 2 and requires system pressure removal for adjustment due to exposed seals on the adjust screw. It is relatively insensitive to oil temperature variations and contamination. For optimal performance, it is recommended to select a spring range where the desired relief setting is midrange to high between minimum and maximum pressures. The RDBALAN incorporates Sun's floating style construction to minimize internal part binding due to installation torque or machining variations. It has a capacity of 12 gpm (45 L/min), a maximum operating pressure of 5000 psi (350 bar), and typical response time of 2 ms. Maximum valve leakage at reseat is minimal at 10 drops/min (0.7 cc/min), with reseat occurring at 85% of the setting. The valve features an adjustment screw internal hex size of 5/32 in (4 mm) and requires an installation torque of 20\u201325 lbf ft (27\u201333 Nm). EPDM seals are available for systems using phosphate ester fluids; however, exposure to petroleum-based fluids can damage these seals.
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-162A |
| Series | 0 |
| Capacity | 12 gpm45 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 | >85% of setting>85% of setting |
| Adjustment - Number of Clockwise Turns to Increase Setting | 55 |
| Valve Hex Size | 3/4 in.19,1 mm |
| Valve Installation Torque | 20 - 25 lbf ft27 - 33 Nm |
| Adjustment Screw Internal Hex Size | 5/32 in.4 mm |
| Locknut Hex Size | 1/2 in.12,7 mm |
| Locknut Torque | 80 - 90 lbf in.9 - 10 Nm |
| Model Weight | .20 lb0,10 kg |
| Seal kit - Cartridge | Viton: 990-162-006 |
Show FAQ
Additional Resources
- CE/TÜV Certified Pressure Relief Valves
- Pressure Relief and Regulating Cartridge Valve Technical Tips
- Pilot Operated, Balanced Poppet Relief Valves
- Sun Expands Corrosion-Resistant Solutions
- Sun Offers Zinc-Nickel Plating for Corrosion Resistance
- Sun Cartridges with EPDM Seals
- Series 4 PLUS Cartridges Offer Higher Flows with Lower Pressure Losses
- Pilot-Operated, Balanced Poppet, Anti Shock Reliefs
- CavitySaver multi-function valves deliver single-cartridge solutions
- 'Soft' Relief Eliminates Pressure Spikes
- Tri-Grip Handknob Now Offered From Sun as a Standard Control Option
- QuickDesign with SmartConnect Offers Drag-and-Drop Schematic Tool
- Sun Introduces 'Hybrid' Valves
- Manufacturing Sun Cartridge Cavities
- Pressure Relief and Regulating Valves
- Sun Model Code Explanation; 999-901-334
- Cartridges: Materials of Construction
- Fluid and Temperature Recommendations
- Performance Data
- Sun's Floating Style Screw-In Cartridge
- Units of Measure, Settings, and Conversions
- Cavity Information (S-171) and Tooling
Notes:
- U.S. Patent #4,742,846; European Patent Pending
