FSDSXAN – Sun Hydraulics Synchronizing, flow divider-combiner valve, Standard Material/Coating
Part number: FSDSXAN · FSDS-XAN · FSDS XAN
Synchronizing, flow divider-combiner valve. Cavity T-32A, capacity 3 – 15 gpm (12 – 60 L/min.). Genuine Sun Hydraulics cartridge — MultiFlow is an authorized distributor.
FSDS-XAN overview
FSDSXAN (FSDS-XAN, FSDS XAN) is a Sun Hydraulics Sun Hydraulics Synchronizing, flow divider-combiner valve, rated 3 - 15 gpm (12 - 60 L/min.) and installed in cavity T-32A. 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.
| FSDSXAN/AP | Stainless Steel, PassivatedStainless Steel, Passivated |
|---|---|
| FSDSXAN/LH | Mild Steel, Zinc-NickelMild Steel, Zinc-Nickel |
| FSDSXAN | Standard Material/CoatingStandard Material/Coating |
Specifications
| Cavity | T-32A |
|---|---|
| Series | 2 |
| Capacity | 3 - 15 gpm (12 - 60 L/min.) |
| Maximum Operating Pressure | 5000 psi (350 bar) |
| Divisional Accuracy at Minimum Input Flow | 50% ±4.5% |
| Divisional Accuracy at Max Input Flow | 50% ±2.5% |
| Pressure Drop at Minimum Rated Input Flow | 30 psi (2 bar) |
| Pressure Drop at Maximum Rated Input Flow | 350 psi (24 bar) |
| Valve Hex Size | 1 1/8 in. (28,6 mm) |
| Valve Installation Torque | 45 - 50 lbf ft (61 - 68 Nm) |
| Model Weight | .60 lb (0,30 kg) |
| Seal kit - Cartridge | Viton: 990032006 |
How to read FSDSXAN
Sun part numbers are the model followed by one code per option. Hyphens, slashes and spaces are only dividers, so FSDSXAN, FSDS-XAN, FSDS XAN are the same part.
| Model | FSDS — Sun Hydraulics Synchronizing, flow divider-combiner valve |
|---|---|
| Control | X — Not Adjustable |
| Flow Split | A — 50/50 |
| 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
- X — Not Adjustable
Flow Split options
- A — 50/50
Seal Material options
- L — Extended Temp. Buna
- 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-32A (19)
- NMB Sun Hydraulics Ninety degree Line mount manifoldFSDSXAN-NMB — request assembly
- NMC Sun Hydraulics Ninety degree Line mount manifoldFSDSXAN-NMC — request assembly
- NMD Sun Hydraulics Ninety degree Line mount manifoldFSDSXAN-NMD — request assembly
- NMJ Sun Hydraulics Ninety degree Line mount manifoldFSDSXAN-NMJ — request assembly
- NMK Sun Hydraulics Ninety degree Line mount manifoldFSDSXAN-NMK — request assembly
- NML Sun Hydraulics Ninety degree Line mount manifoldFSDSXAN-NML — request assembly
- NMU Sun Hydraulics Ninety degree Line mount manifoldFSDSXAN-NMU — request assembly
- NMV Sun Hydraulics Ninety degree Line mount manifoldFSDSXAN-NMV — request assembly
- NMW Sun Hydraulics Ninety degree Line mount manifoldFSDSXAN-NMW — request assembly
- NNB Sun Hydraulics Ninety degree Line mount manifoldFSDSXAN-NNB — request assembly
- NNC Sun Hydraulics Ninety degree Line mount manifoldFSDSXAN-NNC — request assembly
- NND Sun Hydraulics Ninety degree Line mount manifoldFSDSXAN-NND — request assembly
Technical features
- All flow divider and divider/combiner cartridges are physically interchangeable (i.e. same flow path, same cavity for a given frame size).
- Operating characteristics cause the leg of the circuit with the greatest load to receive the higher percentage of flow in dividing mode. If a rigid mechanism is used to tie actuators together, the lead actuator may pull the lagging actuator and cause it to cavitate.
- In combining mode, compensating characteristics will cause the leg of the circuit with the lowest load to receive the higher percentage of flow. If a synchronization feature is not included, an additive accuracy error will be experienced with each full stroke of the actuator.
- In applications involving rigid mechanisms between multiple actuators, operating inaccuracy will cause the eventual lock-up of the system. If the mechanical structure is not designed to allow for the operating inaccuracy inherent in the valve, damage may occur.
- In motor circuits, rigid frames or mechanisms that tie motors together, and/or complete mechanical synchronized motion of the output shaft of the motors, either by wheels to the pavement or sprockets to conveyors, will contribute to cavitation, lock-up and/or pressure intensification.
- Variations in speed and lock-up can be attributed to differences in motor displacement, motor leakage, wheel diameter variance and friction of wheels on the driving surface.
- Extreme pressure intensification can occur on multiple wheel drive vehicles.
- The synchronization feature provides bi-directional static error correction.
- Synchronization flow is approximately 15% of minimum rated input flow.
- Divisional and combining accuracy are equal.
- The synchronizing feature only comes into play when any one of the 3 ports is blocked. At that time, flow may occur between the other two ports.
- Below the minimum flow rating there is not enough flow for the valve to modulate. It is effectively a tee. If flow starts at zero and rises, there will be no dividing or combining control until the flow reaches the minimum rating.
- 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_FlowDivider-New (PDF 626 KB)
CAD files
Frequently asked questions
Is FSDSXAN the same as FSDS-XAN?
Yes. Sun Hydraulics writes this part number as FSDSXAN. It is the model FSDS followed by the configuration code; hyphens, slashes and spaces are only dividers, so FSDSXAN, FSDS-XAN, FSDS XAN all refer to the same product.
Do you supply FSDSXAN in the UAE, GCC and India?
Yes. MultiFlow supplies genuine Sun Hydraulics cartridges, including FSDSXAN, 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 synchronize two cylinders with Sun's divider-combiner?
No. Synchronizing two cylinders hydraulically is a real problem which has no solution. Our valves with the synchronizing feature don't synchronize — they provide an error correction at each end of the stroke when the leading cylinder bottoms out. Another means of error correction is cross-port reliefs.
Why am I getting a higher inaccuracy than Sun claims?
We test every cartridge in 16 modes. High pressure, low pressure, high flow, low flow, divide, and combine.....both legs. What you are probably seeing is the error that occurs as the flow is ramping up to the minimum rated flow. Below the minimum rated flow the valve does not see enough flow to operate correctly.
How has Sun solved the hook breaking problem?
We eliminated the hooks. We have a 1 piece spool.
Why does Sun use 2 slip orifices?
The divider/combiner is an FSDH XAN. Input flow is 15 gpm (57 L/min.). This example depicts orifices that slip about 3 gpm (12 L/min.) at 3000 psi (210 bar) pressure differential between legs. The slip conditions between the 2 examples are the same...please be assured of this. Each orifice on the right is twice the area of the orifice on the left.
The pressure drop through the left example is 200 psi (14 bar), the drop through the right example is 130 psi (9 bar).
Most of Sun's divider-combiners will do better than the published specs, won't they?
No. Almost all of the error percentage we publish is due to flow forces. Even with a mechanically perfect valve you would see most of the variation.
How big do my slip orifices have to be?
With a typical steered axle application the outside wheels go 15% to 20% farther than the inside wheels. As to how big your slip orifices need to be, there is no correct answer and you are the one that needs to make the compromise. If they are too big you will not have the traction you need at low speeds and if they are too small you will not be able to turn at higher speeds.
Most of the dividing-combining inaccuracies will average out, won't they?
Absolutely not. The bell curve does not apply here. In the dividing mode the high pressure leg gets the higher flow and in the combining mode the high pressure leg is the lower flow......every time. The inaccuracies are always there and they accumulate. The high pressure leg goes up farther and comes down less, every time.
How big is a drop of hydraulic oil?
There are exactly 250 Sun drops in a cubic inch or 15 in a cc.
What is the synchronizing feature?
It is a static error correction feature. When any one of the 3 ports of a divider/combiner with the synchronizing feature is blocked, flow is possible between the other 2 ports. This "synchronizing" flow is called out in the performance chart and is pressure compensated.
When the leading actuator comes to a stop, the other actuator can catch up at a rate determined by the "synchronizing" flow.
When the actuators are stopped mid-stroke (port 3 blocked), oil can flow from the high pressure leg to the low pressure leg at a rate determined by the "synchronizing" flow.
The "synchronizing" flow does not exist until one port is blocked.
The "synchronizing" feature is most effective on applications where the actuators bottom out at at least one end of their strokes.
What parts of the Sun cartridge valve are field serviceable?
Manufacturer reference: https://www.sunhydraulics.com/model/FSDS
