RBDA-LAN – Sun Hydraulics Bi-directional, direct-acting relief valve
Part number: RBDALAN · RBDA-LAN · RBDA LAN
Bi-directional, direct-acting relief valve. Cavity T-10A, capacity 25 gpm (95 L/min.). Genuine Sun Hydraulics cartridge — MultiFlow is an authorized distributor.
RBDA-LAN overview
RBDALAN (RBDA-LAN, RBDA LAN) is a Sun Hydraulics Sun Hydraulics Bi-directional, direct-acting relief valve, rated 25 gpm (95 L/min.) and installed in cavity T-10A. MultiFlow supplies genuine Sun Hydraulics cartridges in the UAE, GCC and India — use Add to Enquiry above for availability and a quotation.
Ordering codes
Pick the code that matches the material and finish you need. Add it to your enquiry above, or tap a code to select it.
| RBDALAN | Buna-N sealsBuna-N |
|---|---|
| RBDALAV | Viton sealsViton |
Specifications
| Cavity | T-10A |
|---|---|
| Series | 1 |
| Capacity | 25 gpm (95 L/min.) |
| Maximum Operating Pressure | 5000 psi (350 bar) |
| Factory Pressure Settings Established at | 4 gpm (15 L/min.) |
| Maximum Valve Leakage at Reseat | 10 drops/min. (0,7 cc/min.) |
| Response Time - Typical | 2 ms |
| Reseat | >85% of setting |
| Hysteresis | ≤ 3 % |
| Adjustment - No. of CW Turns from Min. to Max. setting | 5 |
| Valve Hex Size | 7/8 in. (22,2 mm) |
| Valve Installation Torque | 30 - 35 lbf ft (41 - 47 Nm) |
| Model Weight | .40 lb (0,20 kg) |
| U.S. Patent # | 11,384,857 |
| Seal kit - Cartridge | Viton: 990310006 |
How to read RBDALAN
Sun part numbers are the model followed by one code per option. Hyphens, slashes and spaces are only dividers, so RBDALAN, RBDA-LAN, RBDA LAN are the same part.
| Model | RBDA — Sun Hydraulics Bi-directional, direct-acting relief valve |
|---|---|
| Control | L — Standard Screw Adjustment |
| Adjustment Range | A — 1200 - 3000 psi (85-210 bar), 1500 psi (105 bar) Standard Setting |
| Seal Material | N — Buna-N |
| Material / coating | Add /AP (stainless steel, passivated) or /LH (mild steel, zinc-nickel) to the end; no suffix is the standard finish. |
Control options
- C — Tamper Resistant - Factory Set
- L — Standard Screw Adjustment
Adjustment Range options
- A — 1200 - 3000 psi (85-210 bar), 1500 psi (105 bar) Standard Setting
- W — 3000 - 5000 psi (210 - 350 bar), 4000 psi (280 bar) Standard Setting
Seal Material options
- N — Buna-N
- V — Viton
Manifold & standard assemblies
Sun manifolds for cavity T-10A (293)
- CBD Sun Hydraulics ISO 05: A and B to T Sandwich manifoldRBDALAN-CBD — request assembly
- CBE Sun Hydraulics ISO 05: P to T Sandwich manifoldRBDALAN-CBE — request assembly
- CBF Sun Hydraulics ISO 05: A to T Sandwich manifoldRBDALAN-CBF — request assembly
- CBG Sun Hydraulics ISO 05: B to T Sandwich manifoldRBDALAN-CBG — request assembly
- CBH Sun Hydraulics ISO 05: A to B or B to A Sandwich manifoldRBDALAN-CBH — request assembly
- CBI Sun Hydraulics ISO 05: A to B and B to A Sandwich manifoldRBDALAN-CBI — request assembly
- CJY Sun Hydraulics ISO 05 – X&Y: A to B and B to A Sandwich manifoldRBDALAN-CJY — request assembly
- FA3 Sun Hydraulics Ninety degree Line mount manifoldRBDALAN-FA3 — request assembly
- FA4 Sun Hydraulics Ninety degree Line mount manifoldRBDALAN-FA4 — request assembly
- FAA Sun Hydraulics Ninety degree Line mount manifoldRBDALAN-FAA — request assembly
- FAB Sun Hydraulics Ninety degree Line mount manifoldRBDALAN-FAB — request assembly
- FAC Sun Hydraulics Ninety degree Line mount manifoldRBDALAN-FAC — request assembly
Technical features
- Capacity from port 1 to port 2 is 25 GPM (95 L/min). Flow from port 2 to port 1 is rated at 10 GPM (40 L/min).
- Recommended minimum setting is 1200 psi (85 bar). Note: At settings below 1200 psi (85 bar), the valve is rated for maximum transient flows of 25 GPM (95 L/min) only.
- Because the modulating occurs inside the cartridge, these valves are immune to most of the problems associated with cavitation, namely noise and manifold erosion.
- 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.
- 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.
Drawings, symbol & performance curves
Downloads
Datasheet
Technical reference sheets
- 999-901-334 (PDF 344 KB)
- FloatingStyleScrewInCartridge2 (PDF 1 MB)
- TT_US_Cavity-New (PDF 522 KB)
- TT_US_Relief-N (PDF 656 KB)
CAD files
Frequently asked questions
Is RBDALAN the same as RBDA-LAN?
Yes. Sun Hydraulics writes this part number as RBDALAN. It is the model RBDA followed by the configuration code; hyphens, slashes and spaces are only dividers, so RBDALAN, RBDA-LAN, RBDA LAN all refer to the same product.
Do you supply RBDALAN in the UAE, GCC and India?
Yes. MultiFlow supplies genuine Sun Hydraulics cartridges, including RBDALAN, to customers in the UAE, the wider GCC and India. Use Add to Enquiry on this page for availability, lead time and a quotation.
Can I get the datasheet and CAD files?
Yes. The datasheet, technical reference sheets and CAD files (DXF, DWG, STP) are listed in the Downloads section of this page.
How big is a drop of hydraulic oil?
There are exactly 250 Sun drops in a cubic inch or 15 in a cc.
Can I use a kick-down relief for my system relief?
Maybe not. We build in a good amount of overlap in the kick-down reliefs to prevent false tripping. This means they are not as fast as our standard pilot-operated reliefs. A direct-acting relief valve set just above the kick-down relief valve would be good insurance.
Direct acting or pilot operated - what do I use?
Direct-acting valves are used to prevent over pressure, and pilot-operated valves are used to regulate pressure. If you are unsure, use a direct-acting valve. Sun's direct acting valves are very fast, dirt tolerant, stable, and robust. Sun's pilot-operated valves are moderately fast, they have a low pressure rise vs. flow curve, and they are easy to adjust.
Where would I use a kick-down relief?
One graphic example is on a portable grain auger for silos. When the farmer gets caught in the auger the kick-down relief trips and allows him to escape.
What are the tolerances on pressure settings for Sun's pressure control valves?
Pressure setting tolerances are listed in our Performance Data page. A link to this page can also be found in the Additional Resources tab of the applicable product page.
What parts of the Sun cartridge valve are field serviceable?
Manufacturer reference: https://www.sunhydraulics.com/model/RBDA
