CNICXCV – Sun Hydraulics Fixed-orifice, non-pressure compensated, flow control valve with reverse flow check, Viton seals
Part number: CNICXCN · CNIC-XCN · CNIC XCN
Fixed-orifice, non-pressure compensated, flow control valve with reverse flow check. Cavity T-18A, capacity 120 gpm (480 L/min.). Genuine Sun Hydraulics cartridge — MultiFlow is an authorized distributor.
CNIC-XCN overview
CNICXCN (CNIC-XCN, CNIC XCN) is a Sun Hydraulics Sun Hydraulics Fixed-orifice, non-pressure compensated, flow control valve with reverse flow check, rated 120 gpm (480 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.
| CNICXCN | Buna-N sealsBuna-N |
|---|---|
| CNICXCV | Viton sealsViton |
Specifications
| Cavity | T-18A |
|---|---|
| Series | 4 |
| Capacity | 120 gpm (480 L/min.) |
| Maximum Operating Pressure | 5000 psi (350 bar) |
| Orifice Range | .016 - .218 in. (0,4 - 5,5 mm) |
| Valve Hex Size | 1 5/8 in. (41,3 mm) |
| Valve Installation Torque | 350 - 375 lbf ft (474 - 508 Nm) |
| Seal kit - Cartridge | Viton: 990018006 |
How to read CNICXCN
Sun part numbers are the model followed by one code per option. Hyphens, slashes and spaces are only dividers, so CNICXCN, CNIC-XCN, CNIC XCN are the same part.
| Model | CNIC — Sun Hydraulics Fixed-orifice, non-pressure compensated, flow control valve with reverse flow check |
|---|---|
| Control | X — Not Adjustable |
| Setting Range | C — 30 psi (2 bar) Cracking Pressure, .016 - .218 in. (0,4 - 5,5 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 - .218 in. (0,4 - 5,5 mm)
- B — 15 psi (1 bar) Cracking Pressure, .016 - .218 in. (0,4 - 5,5 mm)
- C — 30 psi (2 bar) Cracking Pressure, .016 - .218 in. (0,4 - 5,5 mm)
- D — 50 psi (3,5 bar) Cracking Pressure, .016 - .218 in. (0,4 - 5,5 mm)
- E — 75 psi (5 bar) Cracking Pressure, .016 - .218 in. (0,4 - 5,5 mm)
- F — 100 psi (7 bar) Cracking Pressure, .016 - .218 in. (0,4 - 5,5 mm)
- Z — 1 psi (0,07 bar) Cracking Pressure, .016 - .218 in. (0,4 - 5,5 mm)
Seal Material options
- N — Buna-N
- V — Viton
Manifold & standard assemblies
Sun manifolds for cavity T-18A (102)
- LA2 Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNICXCV-LA2 — request assembly
- LA4 Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNICXCV-LA4 — request assembly
- LA5 Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNICXCV-LA5 — request assembly
- LA6 Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNICXCV-LA6 — request assembly
- LA7 Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNICXCV-LA7 — request assembly
- LA8 Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNICXCV-LA8 — request assembly
- LA9 Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNICXCV-LA9 — request assembly
- LAD Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNICXCV-LAD — request assembly
- LAE Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNICXCV-LAE — request assembly
- LAF Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNICXCV-LAF — request assembly
- LAL Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNICXCV-LAL — request assembly
- LAM Sun Hydraulics Ninety degree with gauge port Line mount manifoldCNICXCV-LAM — request assembly
Technical features
- Customer must specify the orifice diameter.
- 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.
- These are essentially check valves with bypass orifices. The flow path matches Sun's flow controls and can be used in any flow control manifolds. Valves with the opposite direction of flow can be found under check valves with bypass orifices.
- Because these valves are non-compensating devices, the fixed orifice size will regulate flow through the valve in proportion to the square root of the pressure differential across 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
- 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 CNICXCN the same as CNIC-XCN?
Yes. Sun Hydraulics writes this part number as CNICXCN. It is the model CNIC followed by the configuration code; hyphens, slashes and spaces are only dividers, so CNICXCN, CNIC-XCN, CNIC XCN all refer to the same product.
Do you supply CNICXCN in the UAE, GCC and India?
Yes. MultiFlow supplies genuine Sun Hydraulics cartridges, including CNICXCN, 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.
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.
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.
What parts of the Sun cartridge valve are field serviceable?
Manufacturer reference: https://www.sunhydraulics.com/model/CNIC
