FQIAXAN/LH – Sun Hydraulics Fixed-orifice, flow fuse valve, Mild Steel, Zinc-Nickel
Part number: FQIAXAN · FQIA-XAN · FQIA XAN
Fixed-orifice, flow fuse valve. Cavity T-18A, capacity 50 gpm (200 L/min.). Genuine Sun Hydraulics cartridge — MultiFlow is an authorized distributor.
FQIA-XAN overview
FQIAXAN (FQIA-XAN, FQIA XAN) is a Sun Hydraulics Sun Hydraulics Fixed-orifice, flow fuse valve, 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.
| FQIAXAN/AP | Stainless Steel, PassivatedStainless Steel, Passivated |
|---|---|
| FQIAXAN/LH | Mild Steel, Zinc-NickelMild Steel, Zinc-Nickel |
| FQIAXAN | Standard Material/CoatingStandard Material/Coating |
Specifications
| Cavity | T-18A |
|---|---|
| Series | 4 |
| Capacity | 50 gpm (200 L/min.) |
| Maximum Operating Pressure | 5000 psi (350 bar) |
| Maximum Valve Leakage at 110 SUS (24 cSt) | 5 in³/min.@1000 psi (80 cc/min.@70 bar) |
| Valve Hex Size | 1 5/8 in. (41,3 mm) |
| Valve Installation Torque | 350 - 375 lbf ft (474 - 508 Nm) |
| Model Weight | 2.90 lb (1,30 kg) |
| Seal kit - Cartridge | Viton: 990018006 |
How to read FQIAXAN
Sun part numbers are the model followed by one code per option. Hyphens, slashes and spaces are only dividers, so FQIAXAN, FQIA-XAN, FQIA XAN are the same part.
| Model | FQIA — Sun Hydraulics Fixed-orifice, flow fuse valve |
|---|---|
| Control | X — Not Adjustable |
| Setting Range | A — Replaceable Orifice 1 - 50 gpm (4 - 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
- X — Not Adjustable
Setting Range options
- A — Replaceable Orifice 1 - 50 gpm (4 - 200 L/min.)
- B — Permanent Orifice 1 - 50 gpm (4 - 200 L/min.)
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-18A (102)
- LA2 Sun Hydraulics Ninety degree with gauge port Line mount manifoldFQIAXAN/LH-LA2 — request assembly
- LA4 Sun Hydraulics Ninety degree with gauge port Line mount manifoldFQIAXAN/LH-LA4 — request assembly
- LA5 Sun Hydraulics Ninety degree with gauge port Line mount manifoldFQIAXAN/LH-LA5 — request assembly
- LA6 Sun Hydraulics Ninety degree with gauge port Line mount manifoldFQIAXAN/LH-LA6 — request assembly
- LA7 Sun Hydraulics Ninety degree with gauge port Line mount manifoldFQIAXAN/LH-LA7 — request assembly
- LA8 Sun Hydraulics Ninety degree with gauge port Line mount manifoldFQIAXAN/LH-LA8 — request assembly
- LA9 Sun Hydraulics Ninety degree with gauge port Line mount manifoldFQIAXAN/LH-LA9 — request assembly
- LAD Sun Hydraulics Ninety degree with gauge port Line mount manifoldFQIAXAN/LH-LAD — request assembly
- LAE Sun Hydraulics Ninety degree with gauge port Line mount manifoldFQIAXAN/LH-LAE — request assembly
- LAF Sun Hydraulics Ninety degree with gauge port Line mount manifoldFQIAXAN/LH-LAF — request assembly
- LAL Sun Hydraulics Ninety degree with gauge port Line mount manifoldFQIAXAN/LH-LAL — request assembly
- LAM Sun Hydraulics Ninety degree with gauge port Line mount manifoldFQIAXAN/LH-LAM — request assembly
Technical features
- Customer must specify a flow rating. Factory set flow ratings are within +/- 10% of the requested setting.
- Valve closes when flow from port 1 to port 2 exceeds the setting of the valve. Valve resets when pressures at port 1 and port 2 are equal.
- Flow setting should be at least 25% above maximum normal system flow. Customer must specify flow when ordering valve.
- These are spool type valves, therefore there is leakage. Some actuator drift may occur.
- 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 FQIAXAN the same as FQIA-XAN?
Yes. Sun Hydraulics writes this part number as FQIAXAN. It is the model FQIA followed by the configuration code; hyphens, slashes and spaces are only dividers, so FQIAXAN, FQIA-XAN, FQIA XAN all refer to the same product.
Do you supply FQIAXAN in the UAE, GCC and India?
Yes. MultiFlow supplies genuine Sun Hydraulics cartridges, including FQIAXAN, 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.
Can I use a flow fuse to prevent the loss of oil?
NO! Flow fuses are meant to prevent the uncontrolled movement of an actuator in case of hose failure.
Can I use a flow fuse to provide fire protection?
NO! Flow fuses are meant to prevent the uncontrolled movement of an actuator in case of hose failure. To avoid false tripping they must be set above the typical system flow, usually 50% above. On a 4 gpm (15 L/min.) circuit the flow fuse may need to be set at 6 gpm (23 L/min.) to avoid false tripping. Hoses do not normally fail totally, they spring a leak. If the hose springs a 5.5 gpm (21 L/min.) leak the flow fuse will not trip. 5.5 gpm (21 L/min.) of hydraulic fluid will feed a fire that would heat a small town in Ohio (Denmark) in January!
How should I choose the setting of a flow fuse?
It is very, very difficult to predict the transient flows in a system. We say at least 25% above maximum normal system flow and should say 50%. Don’t back yourself into a corner by sizing a flow fuse at the top end of its range unless you can test it. If you have an FQCA in a 4 gpm (15 L/min.) circuit, set at 6 gpm (23 L/min.) and it false trips, you are out of luck. Select an FQEA and leave yourself some room for tuning.
Every time I try to lower my load the flow fuse trips. What's wrong?
What's wrong is that every time you start to lower your load, you get a flow transient that exceeds the setting of the flow fuse and trips it. Sun's flow fuses are very consistent and very fast.
What parts of the Sun cartridge valve are field serviceable?
Manufacturer reference: https://www.sunhydraulics.com/model/FQIA
