SUN HYDRAULICS
COFAXFN
$71.38 USD
- SUN HYDRAULICS
- Material:COFAXFN
- Model:COFA-XFN
- Summary:Cartridge
Quantity in stock: 0
***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Sun Hydraulics directly.***
The Sun Hydraulics COFAXFN (COFAXFN) is a versatile and robust hydraulic valve designed for efficient control in fluid power applications. This spring-biased closed, pilot-to-close check cartridge valve features a nominal pilot ratio of 1.8:1, allowing it to manage flow from port 1 to port 2 while blocking reverse flow under any condition. The valve operates by opposing pressure at the pilot port to pressure at port 1 with its specified pilot ratio, meaning that a pressure of 1000 psi at the pilot port will close the valve against a pressure of 1800 psi at port 1. The COFAXFN is particularly suitable for use in regeneration circuits, where precise control of flow and pressure is necessary. It incorporates Sun's floating style construction which minimizes internal parts binding due to excessive installation torque or cavity/cartridge machining variations, enhancing reliability and performance longevity. The valve's maximum operating pressure stands at an impressive 5000 psi, with a capacity up to 40 gpm. It also features minimal leakage rates, ensuring efficient operation. Configured with EPDM seals, this model is specifically intended for systems utilizing phosphate ester fluids; however, exposure to petroleum-based fluids should be avoided as it can damage the seals. For environments prone to corrosion, cartridges with the AP or LH model code suffix are recommended due to their enhanced corrosion resistance. Installation specifications include a hex size of 1-1/8 inches and an installation torque range of 45-50 lbf ft., making it adaptable for various setup requirements without compromising performance integrity. Weighing just .50 lb, the COFAXFN combines lightweight design with high-capacity functionality, making it an essential component in advanced hydraulic systems seeking reliable and controlled fluid power management.
The Sun Hydraulics COFAXFN (COFAXFN) is a versatile and robust hydraulic valve designed for efficient control in fluid power applications. This spring-biased closed, pilot-to-close check cartridge valve features a nominal pilot ratio of 1.8:1, allowing it to manage flow from port 1 to port 2 while blocking reverse flow under any condition. The valve operates by opposing pressure at the pilot port to pressure at port 1 with its specified pilot ratio, meaning that a pressure of 1000 psi at the pilot port will close the valve against a pressure of 1800 psi at port 1. The COFAXFN is particularly suitable for use in regeneration circuits, where precise control of flow and pressure is necessary. It incorporates Sun's floating style construction which minimizes internal parts binding due to excessive installation torque or cavity/cartridge machining variations, enhancing reliability and performance longevity. The valve's maximum operating pressure stands at an impressive 5000 psi, with a capacity up to 40 gpm. It also features minimal leakage rates, ensuring efficient operation. Configured with EPDM seals, this model is specifically intended for systems utilizing phosphate ester fluids; however, exposure to petroleum-based fluids should be avoided as it can damage the seals. For environments prone to corrosion, cartridges with the AP or LH model code suffix are recommended due to their enhanced corrosion resistance. Installation specifications include a hex size of 1-1/8 inches and an installation torque range of 45-50 lbf ft., making it adaptable for various setup requirements without compromising performance integrity. Weighing just .50 lb, the COFAXFN combines lightweight design with high-capacity functionality, making it an essential component in advanced hydraulic systems seeking reliable and controlled fluid power management.
This valve is a spring biased closed, pilot-to-close check cartridge that has a 1.8:1 pilot ratio. The valve allows flow from port 1 to port 2 and blocks reverse flow. Pressure at the pilot port opposes pressure at port 1 at a ratio of 1.8:1. This valve is most often used in regeneration circuits.
- 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.
| Cavity | T-2A |
| Series | 2 |
| Capacity | 40 gpm160 L/min. |
| Pilot Ratio | 1.8:11.8:1 |
| Maximum Operating Pressure | 5000 psi350 bar |
| Maximum Valve Leakage at 110 SUS (24 cSt) | 1 drops/min.0,07 cc/min. |
| Valve Hex Size | 1 1/8 in.28,6 mm |
| Valve Installation Torque | 45 - 50 lbf ft61 - 68 Nm |
| Model Weight | .50 lb0,25 kg |
| Seal kit - Cartridge | Viton: 990-202-006 |
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