HRDA-LAN – Sun Hydraulics Direct-acting relief valve – before check
Part number: HRDALAN · HRDA-LAN · HRDA LAN
Direct-acting relief valve – before check. Cavity T-11A, capacity 10 gpm (40 L/min.). Genuine Sun Hydraulics cartridge — MultiFlow is an authorized distributor.
HRDA-LAN overview
HRDALAN (HRDA-LAN, HRDA LAN) is a Sun Hydraulics Sun Hydraulics Direct-acting relief valve - before check, rated 10 gpm (40 L/min.) and installed in cavity T-11A. 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.
| HRDALAN/AP | Stainless Steel, PassivatedStainless Steel, Passivated |
|---|---|
| HRDALAN | Standard Material/CoatingStandard Material/Coating |
Specifications
| Cavity | T-11A |
|---|---|
| Series | 1 |
| Capacity | 10 gpm (40 L/min.) |
| Maximum Operating Pressure | 5000 psi (350 bar) |
| Factory Pressure Settings Established at | 4 gpm (15 L/min.) |
| Maximum Valve Leakage at Reseat | 5 drops/min. (0,3 cc/min.) |
| Check Cracking Pressure | 25 psi (1,7 bar) |
| Response Time - Typical | 10 ms |
| Adjustment - No. of CW Turns from Min. to Max. setting | 6 |
| Valve Hex Size | 7/8 in. (22,2 mm) |
| Valve Installation Torque | 30 - 35 lbf ft (41 - 47 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 | .35 lb (0,15 kg) |
| Seal kit - Cartridge | Viton: 990011006 |
How to read HRDALAN
Sun part numbers are the model followed by one code per option. Hyphens, slashes and spaces are only dividers, so HRDALAN, HRDA-LAN, HRDA LAN are the same part.
| Model | HRDA — Sun Hydraulics Direct-acting relief valve - before check |
|---|---|
| Control | L — Standard Screw Adjustment |
| Adjustment Range | A — 500 - 3000 psi (35 - 210 bar), 1000 psi (70 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
- K — Handknob
- L — Standard Screw Adjustment
Adjustment Range options
- A — 500 - 3000 psi (35 - 210 bar), 1000 psi (70 bar) Standard Setting
- D — 200 - 700 psi (14 - 50 bar), 400 psi (28 bar) Standard Setting
- W — 800 - 4500 psi (55 - 315 bar), 1000 psi (70 bar) Standard Setting
Seal Material options
- N — Buna-N
- V — Viton
Material/coating options
- /AP — Stainless Steel, Passivated
- — Standard Material/Coating
Manifold & standard assemblies
Sun manifolds for cavity T-11A (583)
- A2A Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldHRDALAN-A2A — request assembly
- A2B Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldHRDALAN-A2B — request assembly
- A2C Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldHRDALAN-A2C — request assembly
- A2I Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldHRDALAN-A2I — request assembly
- A2J Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldHRDALAN-A2J — request assembly
- A2K Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldHRDALAN-A2K — request assembly
- A2T Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldHRDALAN-A2T — request assembly
- A2U Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldHRDALAN-A2U — request assembly
- A2V Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldHRDALAN-A2V — request assembly
- A7A Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldHRDALAN-A7A — request assembly
- A7B Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldHRDALAN-A7B — request assembly
- A7C Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldHRDALAN-A7C — request assembly
Technical features
- Note! This valve deviates from Sun's normal flow path for relief valves. It is probably not useable in current Sun relief manifolds.
- 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.
- 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.
- The check portion of the valve has a maximum leakage rate of less than 1 drop/minute (0,07 cc/min).
- One purpose of this dual function cartridge is to offer pump isolation and relief protection in single and/or multiple pump circuits. Another purpose is to act as a main stage in an accumulator sense, pump unload circuit.
- The direct acting relief exhibits rapid response characteristics that minimize pressure overshoot and also provides low reseat leakage (less than 5 drops/min (0,3 cc/min) @ 85% of cracking pressure), check valve leackage is less than 1 drop/min (0,07 cc/min).
- 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 HRDALAN the same as HRDA-LAN?
Yes. Sun Hydraulics writes this part number as HRDALAN. It is the model HRDA followed by the configuration code; hyphens, slashes and spaces are only dividers, so HRDALAN, HRDA-LAN, HRDA LAN all refer to the same product.
Do you supply HRDALAN in the UAE, GCC and India?
Yes. MultiFlow supplies genuine Sun Hydraulics cartridges, including HRDALAN, 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.
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.
How big is a drop of hydraulic oil?
There are exactly 250 Sun drops in a cubic inch or 15 in a cc.
What parts of the Sun cartridge valve are field serviceable?
Manufacturer reference: https://www.sunhydraulics.com/model/HRDA
