QCDA-LAN – Sun Hydraulics 15%, accumulator sense, pump unload valve with check – pilot capacity
Part number: QCDALAN · QCDA-LAN · QCDA LAN
15%, accumulator sense, pump unload valve with check – pilot capacity. Cavity T-21A, capacity 15 gpm (60 L/min.). Genuine Sun Hydraulics cartridge — MultiFlow is an authorized distributor.
QCDA-LAN overview
QCDALAN (QCDA-LAN, QCDA LAN) is a Sun Hydraulics Sun Hydraulics 15%, accumulator sense, pump unload valve with check - pilot capacity, rated 15 gpm (60 L/min.) and installed in cavity T-21A. 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.
| QCDALAN/AP | Stainless Steel, PassivatedStainless Steel, Passivated |
|---|---|
| QCDALAN | Standard Material/CoatingStandard Material/Coating |
Specifications
| Cavity | T-21A |
|---|---|
| Series | 1 |
| Capacity | 15 gpm (60 L/min.) |
| Maximum Operating Pressure | 5000 psi (350 bar) |
| Check Cracking Pressure | 4 psi (0,3 bar) |
| Pressure Drop, Port 1 to Port 2 | 100 psi@15 gpm (7 bar@60 L/min.) |
| Pilot Flow Capacity | 46 in³/min. (0,75 L/min.) |
| 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) |
| 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: 990021006 |
How to read QCDALAN
Sun part numbers are the model followed by one code per option. Hyphens, slashes and spaces are only dividers, so QCDALAN, QCDA-LAN, QCDA LAN are the same part.
| Model | QCDA — Sun Hydraulics 15%, accumulator sense, pump unload valve with check - pilot capacity |
|---|---|
| Control | L — Standard Screw Adjustment |
| Adjustment Range | A — 1000 - 3000 psi (70 - 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
- L — Standard Screw Adjustment
- K — Handknob
Adjustment Range options
- A — 1000 - 3000 psi (70 - 210 bar), 1000 psi (70 bar) Standard Setting
- B — 500 - 1500 psi (35 - 105 bar), 500 psi (35 bar) Standard Setting
- C — 2000 - 5000 psi (140 - 350 bar), 2000 psi (140 bar) Standard Setting
- D — 250 - 800 psi (18 - 55 bar), 250 psi (18 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-21A (54)
- M4A Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldQCDALAN-M4A — request assembly
- M4B Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldQCDALAN-M4B — request assembly
- M4C Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldQCDALAN-M4C — request assembly
- M4I Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldQCDALAN-M4I — request assembly
- M4J Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldQCDALAN-M4J — request assembly
- M4K Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldQCDALAN-M4K — request assembly
- M4T Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldQCDALAN-M4T — request assembly
- M4U Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldQCDALAN-M4U — request assembly
- M4V Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldQCDALAN-M4V — request assembly
- MAA Sun Hydraulics Ninety degree Line mount manifoldQCDALAN-MAA — request assembly
- MAB Sun Hydraulics Ninety degree Line mount manifoldQCDALAN-MAB — request assembly
- MAC Sun Hydraulics Ninety degree Line mount manifoldQCDALAN-MAC — request assembly
Technical features
- The pressure differential between unload and reset will be within +3/-2% of the stated ratio of the valve.
- The accumulator sensing area is positively sealed.
- The spool design of this valve allows it to maintain a fixed differential ratio because the areas are created by diameters on the spool that will not wear or change with use.
- Minimum clearances between the spool and sleeve and a seal on the pilot piston diameter significantly reduce the potential for silting.
- When applying this cartridge, a separate drain line is required to prevent erratic operation caused by tank line pressure fluctuations.
- NOTE: Careful consideration should be given when selecting an adjustment range. System pressure drops and flows tend to affect the operation of unloading valves. Low operating pressures combined with low differentials result in a very narrow band between unload and reset, requiring precise system design. High flow rates typically mean high pressure drops, which subtract from the differential the valve has to work with.
- Sun has designed a variety of standard accumulator/pump unload assemblies with a variety of features. These assemblies can be found on our website under SOLUTIONS: ACCUMLATOR SENSE, PUMP UNLOAD.
- 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_CIRCUIT-SAVERS-New (PDF 466 KB)
- TT_US_Cavity-New (PDF 522 KB)
CAD files
Frequently asked questions
Is QCDALAN the same as QCDA-LAN?
Yes. Sun Hydraulics writes this part number as QCDALAN. It is the model QCDA followed by the configuration code; hyphens, slashes and spaces are only dividers, so QCDALAN, QCDA-LAN, QCDA LAN all refer to the same product.
Do you supply QCDALAN in the UAE, GCC and India?
Yes. MultiFlow supplies genuine Sun Hydraulics cartridges, including QCDALAN, 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.
I need to charge an accumulator. What do I need to know?
What parts of the Sun cartridge valve are field serviceable?
Manufacturer reference: https://www.sunhydraulics.com/model/QCDA
