DRBOXFN – Sun Hydraulics 3-way, direct-acting, fixed setting, directional valve with drain to port 4 (1 blocked, 2 to 3 open), Standard Material/Coating
Part number: DRBOXFN · DRBOX-FN · DRBOX FN
3-way, direct-acting, fixed setting, directional valve with drain to port 4 (1 blocked, 2 to 3 open). Cavity T-21A, capacity 7 gpm (28 L/min.). Genuine Sun Hydraulics cartridge — MultiFlow is an authorized distributor.
DRBOX-FN overview
DRBOXFN (DRBOX-FN, DRBOX FN) is a Sun Hydraulics Sun Hydraulics 3-way, direct-acting, fixed setting, directional valve with drain to port 4 (1 blocked, 2 to 3 open), rated 7 gpm (28 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.
| DRBOXFN/AP | Stainless Steel, PassivatedStainless Steel, Passivated |
|---|---|
| DRBOXFN/LH | Mild Steel, Zinc-NickelMild Steel, Zinc-Nickel |
| DRBOXFN | Standard Material/CoatingStandard Material/Coating |
Specifications
| Cavity | T-21A |
|---|---|
| Series | 1 |
| Capacity | 7 gpm (28 L/min.) |
| Maximum Operating Pressure | 5000 psi (350 bar) |
| Factory Pressure Settings Established at | 4 gpm (15 L/min.) |
| Maximum Valve Leakage at 110 SUS (24 cSt) | 2 in³/min. (30 cc/min.) |
| Valve Hex Size | 7/8 in. (22,2 mm) |
| Valve Installation Torque | 30 - 35 lbf ft (41 - 47 Nm) |
| Model Weight | .55 lb (0,25 kg) |
| Seal kit - Cartridge | Viton: 990021006 |
How to read DRBOXFN
Sun part numbers are the model followed by one code per option. Hyphens, slashes and spaces are only dividers, so DRBOXFN, DRBOX-FN, DRBOX FN are the same part.
| Model | DRBOX — Sun Hydraulics 3-way, direct-acting, fixed setting, directional valve with drain to port 4 (1 blocked, 2 to 3 open) |
|---|---|
| Shifting Pressure | F — 100 psi (7 bar) |
| 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. |
Shifting Pressure options
- F — 100 psi (7 bar)
Seal Material options
- N — Buna-N
- V — Viton
Material/coating options
- /AP — Stainless Steel, Passivated
- /LH — Mild Steel, Zinc-Nickel
- — 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 manifoldDRBOXFN-M4A — request assembly
- M4B Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldDRBOXFN-M4B — request assembly
- M4C Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldDRBOXFN-M4C — request assembly
- M4I Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldDRBOXFN-M4I — request assembly
- M4J Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldDRBOXFN-M4J — request assembly
- M4K Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldDRBOXFN-M4K — request assembly
- M4T Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldDRBOXFN-M4T — request assembly
- M4U Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldDRBOXFN-M4U — request assembly
- M4V Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldDRBOXFN-M4V — request assembly
- MAA Sun Hydraulics Ninety degree Line mount manifoldDRBOXFN-MAA — request assembly
- MAB Sun Hydraulics Ninety degree Line mount manifoldDRBOXFN-MAB — request assembly
- MAC Sun Hydraulics Ninety degree Line mount manifoldDRBOXFN-MAC — request assembly
Technical features
- Port 3 can be used as a work port.
- The flow path between port 2 and port 3 is bidirectional.
- Because of their direct-acting design, these cartridges feature low internal leakage and low pilot flow consumption.
- Direct-acting and pilot-operated versions of these valves are interchangeable. They fit the same cavities and have the same flow paths.
- Pressure at port 4 is directly additive to the setting of the valve.
- This valve is not bistable; it is capable of modulating between the two positions shown.
- The flow path between port 1 and port 2 is bidirectional.
- Maximum pressure at port 3 should be limited to 3000 psi (210 bar). This is due to fatigue strength limits not hydraulic operating limits.
- 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_PCDirectional-New_1 (PDF 630 KB)
CAD files
Frequently asked questions
Is DRBOXFN the same as DRBOX-FN?
Yes. Sun Hydraulics writes this part number as DRBOXFN. It is the model DRBOX followed by the configuration code; hyphens, slashes and spaces are only dividers, so DRBOXFN, DRBOX-FN, DRBOX FN all refer to the same product.
Do you supply DRBOXFN in the UAE, GCC and India?
Yes. MultiFlow supplies genuine Sun Hydraulics cartridges, including DRBOXFN, 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.
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.
What parts of the Sun cartridge valve are field serviceable?
I used a DP** in a circuit but it hangs. What happened?
DP**s and DR**s are from the reducer/reliever family and are very capable of modulating. They are not bistable.
Where would I use a DR__ instead of a DP__?
In many circuits the directional cartridge is set to shift at a low pressure no matter how high the pilot pressure goes. If you use a DP__ , the pilot flow increases to significant amounts. A DR__ however will only consume a small amount of flow. A DP__ is useful when you want to block or open the pilot flow to shift the valve.
Manufacturer reference: https://www.sunhydraulics.com/model/DRBOX
