COJAXCN – Sun Hydraulics Pilot-to-close check valve, Standard Material/Coating
Part number: COJAXCN · COJA-XCN · COJA XCN
Pilot-to-close check valve. Cavity T-19A, capacity 160 gpm (610 L/min.). Genuine Sun Hydraulics cartridge — MultiFlow is an authorized distributor.
COJA-XCN overview
COJAXCN (COJA-XCN, COJA XCN) is a Sun Hydraulics Sun Hydraulics Pilot-to-close check valve, rated 160 gpm (610 L/min.) and installed in cavity T-19A. 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.
| COJAXCN/AP | Stainless Steel, PassivatedStainless Steel, Passivated |
|---|---|
| COJAXCN/LH | Mild Steel, Zinc-NickelMild Steel, Zinc-Nickel |
| COJAXCN | Standard Material/CoatingStandard Material/Coating |
Specifications
| Cavity | T-19A |
|---|---|
| Series | 4 |
| Capacity | 160 gpm (610 L/min.) |
| Maximum Operating Pressure | 5000 psi (350 bar) |
| Pilot Ratio | 1.8:1 |
| Maximum Valve Leakage at 110 SUS (24 cSt) | 1 drops/min. (0,07 cc/min.) |
| Valve Hex Size | 1 5/8 in. (41,3 mm) |
| Valve Installation Torque | 350 - 375 lbf ft (474 - 508 Nm) |
| Model Weight | 2.60 lb (1,20 kg) |
| Seal kit - Cartridge | Viton: 990019006 |
How to read COJAXCN
Sun part numbers are the model followed by one code per option. Hyphens, slashes and spaces are only dividers, so COJAXCN, COJA-XCN, COJA XCN are the same part.
| Model | COJA — Sun Hydraulics Pilot-to-close check valve |
|---|---|
| Control | X — Standard Pilot |
| Cracking Pressure | C — 30 psi (2 bar) |
| 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 — Standard Pilot
Cracking Pressure options
- A — 4 psi (0,3 bar)
- B — 15 psi (1 bar)
- C — 30 psi (2 bar)
- D — 50 psi (3,5 bar)
- E — 75 psi (5 bar)
- F — 100 psi (7 bar)
- G — 150 psi (10,5 bar)
- Z — 1 psi (0,07 bar)
Seal Material options
- N — Buna-N
- V — Viton
- E — EPDM
Material/coating options
- /AP — Stainless Steel, Passivated
- /LH — Mild Steel, Zinc-Nickel
- — Standard Material/Coating
Manifold & standard assemblies
Sun manifolds for cavity T-19A (186)
- BKL Sun Hydraulics ISO 07: On A, port 3 to B Sandwich manifoldCOJAXCN-BKL — request assembly
- BKM Sun Hydraulics ISO 07: On B, port 3 to A Sandwich manifoldCOJAXCN-BKM — request assembly
- BKN Sun Hydraulics ISO 07: On A and B with cross pilot Sandwich manifoldCOJAXCN-BKN — request assembly
- BKO Sun Hydraulics ISO 07: On P, port 3 to T Sandwich manifoldCOJAXCN-BKO — request assembly
- K25 Sun Hydraulics Ninety degree with reverse flow check Line mount manifoldCOJAXCN-K25 — request assembly
- K26 Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldCOJAXCN-K26 — request assembly
- K28 Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldCOJAXCN-K28 — request assembly
- K2D Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldCOJAXCN-K2D — request assembly
- K2E Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldCOJAXCN-K2E — request assembly
- K2F Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldCOJAXCN-K2F — request assembly
- K2L Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldCOJAXCN-K2L — request assembly
- K2M Sun Hydraulics Ninety degree with reverse flow check – reducing Line mount manifoldCOJAXCN-K2M — request assembly
Technical features
- Nominal pilot ratio is 1.8:1. This means that a pressure of 1000 psi (70 bar) at the pilot port will close a valve against a pressure of 1800 psi (125 bar) at port 1. Any decay or loss of pilot pressure could allow the valve to open, even if it is a momentary decay or loss.
- Pressure at the port 2 area directly opposes pilot pressure.
- Reverse flow through the valve from port 2 to port 1 is not possible under any condition.
- With equal pressures at all ports the valve is closed.
- In the begining the CO*A's did not have a positive seal on the pilot pistons and the CO*B's did. Now the CO*A's are positively sealed and the 2 valves are mechanically identical. CO*A's are more readily available and cost less.
- Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
- Corrosion resistant cartridge valves are intended for use in corrosive environments and are identified by the model code suffix /AP or /LH (see CONFIGURATION section). For further details, please see the Materials of Construction page under TECHNICAL RESOURCES.
- 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
Frequently asked questions
Is COJAXCN the same as COJA-XCN?
Yes. Sun Hydraulics writes this part number as COJAXCN. It is the model COJA followed by the configuration code; hyphens, slashes and spaces are only dividers, so COJAXCN, COJA-XCN, COJA XCN all refer to the same product.
Do you supply COJAXCN in the UAE, GCC and India?
Yes. MultiFlow supplies genuine Sun Hydraulics cartridges, including COJAXCN, 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?
Manufacturer reference: https://www.sunhydraulics.com/model/COJA
