CNKCXAN – Sun Hydraulics Free flow nose to side check valve with bypass orifice, Buna-N seals
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Part number: CNKCXAN · CNKC-XAN · CNKC XAN
Free flow nose to side check valve with bypass orifice. Cavity T-18AU, capacity 180 gpm (680 L/min.). Genuine Sun Hydraulics cartridge — MultiFlow is an authorized distributor.
CNKC-XAN overview
CNKCXAN (CNKC-XAN, CNKC XAN) is a Sun Hydraulics Sun Hydraulics Free flow nose to side check valve with bypass orifice, rated 180 gpm (680 L/min.) and installed in cavity T-18AU. 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.
| CNKCXAN | Buna-N sealsBuna-N |
|---|---|
| CNKCXAV | Viton sealsViton |
Specifications
| Cavity | T-18AU |
|---|---|
| Series | 4 |
| Capacity | 180 gpm (680 L/min.) |
| Maximum Operating Pressure | 5000 psi (350 bar) |
| Orifice Range | .016 - .354 in. (0,4 - 9 mm) |
| Valve Hex Size | 1 5/8 in. (41,3 mm) |
| Valve Installation Torque | 350 - 375 lbf ft (474 - 508 Nm) |
| Model Weight | 2.10 lb (0,95 kg) |
| Seal kit - Cartridge | Viton: 990018006 |
How to read CNKCXAN
Sun part numbers are the model followed by one code per option. Hyphens, slashes and spaces are only dividers, so CNKCXAN, CNKC-XAN, CNKC XAN are the same part.
| Model | CNKC — Sun Hydraulics Free flow nose to side check valve with bypass orifice |
|---|---|
| Control | X — Not Adjustable |
| Setting Range | A — 4 psi (0,3 bar) Cracking Pressure, .016 - .354 in. (0,4 - 9 mm) |
| 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 — 4 psi (0,3 bar) Cracking Pressure, .016 - .354 in. (0,4 - 9 mm)
- B — 15 psi (1 bar) Cracking Pressure, .016 - .354 in. (0,4 - 9 mm)
- C — 30 psi (2 bar) Cracking Pressure, .016 - .354 in. (0,4 - 9 mm)
- D — 50 psi (3,5 bar) Cracking Pressure, .016 - .354 in. (0,4 - 9 mm)
- E — 75 psi (5 bar) Cracking Pressure, .016 - .354 in. (0,4 - 9 mm)
- F — 100 psi (7 bar) Cracking Pressure, .016 - .354 in. (0,4 - 9 mm)
- G — 150 psi (10 bar) Cracking Pressure, .016 - .354 in. (0,4 - 9 mm)
- Z — 1 psi (0,07 bar) Cracking Pressure, .016 - .354 in. (0,4 - 9 mm)
Seal Material options
- N — Buna-N
- V — Viton
Manifold & standard assemblies
Sun manifolds for cavity T-18AU (13)
- LB5 Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNKCXAN-LB5 — request assembly
- LB6 Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNKCXAN-LB6 — request assembly
- LB8 Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNKCXAN-LB8 — request assembly
- LBQ Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNKCXAN-LBQ — request assembly
- LBR Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNKCXAN-LBR — request assembly
- LBS Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNKCXAN-LBS — request assembly
- LD5 Sun Hydraulics Through port 1 with gauge port Line mount manifoldCNKCXAN-LD5 — request assembly
- LD6 Sun Hydraulics Through port 1 with gauge port Line mount manifoldCNKCXAN-LD6 — request assembly
- LD8 Sun Hydraulics Through port 1 with gauge port Line mount manifoldCNKCXAN-LD8 — request assembly
- LDQ Sun Hydraulics Through port 1 with gauge port Line mount manifoldCNKCXAN-LDQ — request assembly
- LDR Sun Hydraulics Through port 1 with gauge port Line mount manifoldCNKCXAN-LDR — request assembly
- LDS Sun Hydraulics Through port 1 with gauge port Line mount manifoldCNKCXAN-LDS — request assembly
Technical features
- Two-port check valves share the same cavity for a given frame size, however, pay close attention as flow paths may be in opposite directions.
- These valves will work in Sun's standard T-18A cavity at lower capacity. To realize the full stated capacity, the T-18AU cavity should be used.
- Valves with the opposite flow path (free flow from 2 to 1) are considered flow controls and may be found listed as fixed orifice, non-pressure compensated flow control valve with reverse flow check.
- Will accept 5000 psi (350 bar) at ports 1 and 2.
- The customer specified orifice diameter is stamped on one of the cartridge's hex faces.
- 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
CAD files
Frequently asked questions
Is CNKCXAN the same as CNKC-XAN?
Yes. Sun Hydraulics writes this part number as CNKCXAN. It is the model CNKC followed by the configuration code; hyphens, slashes and spaces are only dividers, so CNKCXAN, CNKC-XAN, CNKC XAN all refer to the same product.
Do you supply CNKCXAN in the UAE, GCC and India?
Yes. MultiFlow supplies genuine Sun Hydraulics cartridges, including CNKCXAN, 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.
I need to discharge a large accumulator. How can I increase the capacity of my discharge circuit?
Because of the very high ratio, the COFO has limited capacity. The discharge path is across a .050 inch (1,3 mm) diameter orifice. If you have large accumulators combined with low precharge pressures, this may not discharge the energy quickly enough. Using the COFO XDN cartridge in conjunction with an LODA XDN will provide capacity for larger applications.
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/CNKC
