FCFB-XAN – Sun Hydraulics Fixed-orifice pressure compensated flow control valve with reverse flow check
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Part number: FCFBXAN · FCFB-XAN · FCFB XAN
Fixed-orifice pressure compensated flow control valve with reverse flow check. Cavity T-18A, capacity 50 gpm (200 L/min.). Genuine Sun Hydraulics cartridge — MultiFlow is an authorized distributor.
FCFB-XAN overview
FCFBXAN (FCFB-XAN, FCFB XAN) is a Sun Hydraulics Sun Hydraulics Fixed-orifice pressure compensated flow control valve with reverse flow check, rated 50 gpm (200 L/min.) and installed in cavity T-18A. 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.
| FCFBXAN/AP | Stainless Steel, PassivatedStainless Steel, Passivated |
|---|---|
| FCFBXAN | Standard Material/CoatingStandard Material/Coating |
Specifications
| Cavity | T-18A |
|---|---|
| Series | 4 |
| Capacity | 50 gpm (200 L/min.) |
| Maximum Operating Pressure | 5000 psi (350 bar) |
| Valve Hex Size | 1 5/8 in. (41,3 mm) |
| Valve Installation Torque | 350 - 375 lbf ft (474 - 508 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 | 1.00 lb (0,45 kg) |
| Seal kit - Cartridge | Viton: 990018006 |
How to read FCFBXAN
Sun part numbers are the model followed by one code per option. Hyphens, slashes and spaces are only dividers, so FCFBXAN, FCFB-XAN, FCFB XAN are the same part.
| Model | FCFB — Sun Hydraulics Fixed-orifice pressure compensated flow control valve with reverse flow check |
|---|---|
| Control | X — Not Adjustable |
| Setting Range | A — Replaceable Orifice .2 - 50 gpm (1 - 200 L/min.) |
| 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
- L — Tuning Adjustment
- X — Not Adjustable
- K — Handknob
- C — Tamper Resistant - Factory Set
Setting Range options
- A — Replaceable Orifice .2 - 50 gpm (1 - 200 L/min.)
- B — Permanent Orifice .2 - 50 gpm (1 - 200 L/min.)
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-18A (102)
- LA2 Sun Hydraulics Ninety degree with gauge port Line mount manifoldFCFBXAN-LA2 — request assembly
- LA4 Sun Hydraulics Ninety degree with gauge port Line mount manifoldFCFBXAN-LA4 — request assembly
- LA5 Sun Hydraulics Ninety degree with gauge port Line mount manifoldFCFBXAN-LA5 — request assembly
- LA6 Sun Hydraulics Ninety degree with gauge port Line mount manifoldFCFBXAN-LA6 — request assembly
- LA7 Sun Hydraulics Ninety degree with gauge port Line mount manifoldFCFBXAN-LA7 — request assembly
- LA8 Sun Hydraulics Ninety degree with gauge port Line mount manifoldFCFBXAN-LA8 — request assembly
- LA9 Sun Hydraulics Ninety degree with gauge port Line mount manifoldFCFBXAN-LA9 — request assembly
- LAD Sun Hydraulics Ninety degree with gauge port Line mount manifoldFCFBXAN-LAD — request assembly
- LAE Sun Hydraulics Ninety degree with gauge port Line mount manifoldFCFBXAN-LAE — request assembly
- LAF Sun Hydraulics Ninety degree with gauge port Line mount manifoldFCFBXAN-LAF — request assembly
- LAL Sun Hydraulics Ninety degree with gauge port Line mount manifoldFCFBXAN-LAL — request assembly
- LAM Sun Hydraulics Ninety degree with gauge port Line mount manifoldFCFBXAN-LAM — request assembly
Technical features
- Customer must specify a flow rating. Factory set flow ratings are within +/- 10% of the requested setting.
- The tuneable control option provides +/- 20% variation from the nominal factory pre-set flow. Turn the adjustment clockwise to increase.
- All 2-port flow control cartridges are physically and functionally interchangeable (i.e. same flow path, same cavity for a given frame size). However, cartridge extension dimensions from the mounting surface may vary.
- The sharp-edged orifice design minimizes flow variations due to viscosity changes.
- 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_check-flow1-New (PDF 537 KB)
CAD files
Frequently asked questions
Is FCFBXAN the same as FCFB-XAN?
Yes. Sun Hydraulics writes this part number as FCFBXAN. It is the model FCFB followed by the configuration code; hyphens, slashes and spaces are only dividers, so FCFBXAN, FCFB-XAN, FCFB XAN all refer to the same product.
Do you supply FCFBXAN in the UAE, GCC and India?
Yes. MultiFlow supplies genuine Sun Hydraulics cartridges, including FCFBXAN, 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.
What is the pressure drop through a flow control?
In a meter-in flow control circuit if the pump is set at 3000 psi and the load is 2000 psi the drop through the flow control is 1000 psi. In a meter-out circuit with the load at 2000 psi the drop through the flow control is 2000 psi.
How accurate are Sun's flow controls?
We claim +/- 10%. We set to +/- 5% in production testing to allow for differences in customers' conditions. If you want accuracy, stay in the bottom 2/3rds of the range. Our 12 gpm (45 L/min.) flow controls are quite flat at 9 gpm (34 L/min.) and dead flat below 6 gpm (23 L/min.), until you get to the bottom of the range. Below about .25 gpm (1 L/min.), spool leakage and orifice conditions start to limit accuracy.
I have a heat problem, will Sun's priority flow control help?
I am afraid not. Unless you are overflowing your current valve and correctly size ours, you are not likely to notice any improvement. Priority flow controls are not efficient devices. They are an easy way to get more than 1 source of oil from 1 pump but they can generate a lot of heat. Try to size your actuators so the pressures are similar on both the priority and the bypass circuits. If you can't do that, try to have the lower flow leg be the lower pressure. The pump pressure is determined by whichever leg is higher and if there is flow that is taking a pressure drop that is not doing work it is creating heat.
What happens if I block the control flow (priority) port?
All flow is blocked, hence the term priority. The priority flow has to be satisfied.
What happens if I block the bypass port on a priority flow control?
The valve acts as a 2 port restrictive flow control.
What is the compensating pressure of Sun's flow controls?
The spring force in our flow controls equates to about 100 psi (7 bar). This is high enough to give the valves acceptable capacity and not too high for proper circuit operation. 100 psi (7 bar) is the spring force; at the upper end of the flow control's range, the drop through the valve will be as high as 250 psi (17 bar) before it starts modulating.
What parts of the Sun cartridge valve are field serviceable?
Only external seals are serviceable. Sun offers replacement seal kits for all cartridge models. The applicable kit part number can be found in the product page's Technical Data table or by using our Cartridge Seal Kit search function located under Accessories. Please note: Converting the external seals from one material to another does not ensure fluid compatibility with that material due to the existence of internal seals within the cartridge.
Manufacturer reference: https://www.sunhydraulics.com/model/FCFB
