SUN HYDRAULICS
COFAXJN
$71.90 USD
Tags:
- SUN HYDRAULICS
- Material:COFAXJN
- Model:COFA-XJN
- 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 COFAXJN (COFAXJN) is a high-performance spring biased closed, pilot-to-close check cartridge valve with a nominal pilot ratio of 1.8:1. This valve facilitates fluid flow from port 1 to port 2 while effectively blocking any reverse flow from port 2 to port 1 under all conditions, ensuring unidirectional control in hydraulic circuits. Specifically designed for regeneration circuits, the COFAXJN operates by opposing pressure at the pilot port to the pressure at port 1 with its specified pilot ratio, which means that a pressure of 1000 psi at the pilot can close the valve against a pressure of 1800 psi at port 1. The valve's performance is optimized for systems requiring precise control over fluid handling and directionality, particularly in applications where temporary or momentary loss of pilot pressure could occur. It incorporates Sun Hydraulics' floating style construction which minimizes internal part binding due to potential installation torque excesses or cavity/cartridge machining variations. Rated for a maximum operating pressure of up to 5000 psi and capable of handling flow rates up to 40 gpm, this valve is robust and versatile for various high-pressure applications. The model ensures low leakage with maximum valve leakage specified at approximately one drop per minute. It has been engineered with an installation torque between 45-50 lbf ft and comes in a compact form factor weighing just about .50 lb. For environments involving phosphate ester fluids, cartridges configured with EPDM seals are recommended; however, they must not be exposed to petroleum-based fluids which could damage these seals. Corrosion-resistant models are also available indicated by suffixes AP or LH in their model codes for enhanced durability in corrosive settings.
The Sun Hydraulics COFAXJN (COFAXJN) is a high-performance spring biased closed, pilot-to-close check cartridge valve with a nominal pilot ratio of 1.8:1. This valve facilitates fluid flow from port 1 to port 2 while effectively blocking any reverse flow from port 2 to port 1 under all conditions, ensuring unidirectional control in hydraulic circuits. Specifically designed for regeneration circuits, the COFAXJN operates by opposing pressure at the pilot port to the pressure at port 1 with its specified pilot ratio, which means that a pressure of 1000 psi at the pilot can close the valve against a pressure of 1800 psi at port 1. The valve's performance is optimized for systems requiring precise control over fluid handling and directionality, particularly in applications where temporary or momentary loss of pilot pressure could occur. It incorporates Sun Hydraulics' floating style construction which minimizes internal part binding due to potential installation torque excesses or cavity/cartridge machining variations. Rated for a maximum operating pressure of up to 5000 psi and capable of handling flow rates up to 40 gpm, this valve is robust and versatile for various high-pressure applications. The model ensures low leakage with maximum valve leakage specified at approximately one drop per minute. It has been engineered with an installation torque between 45-50 lbf ft and comes in a compact form factor weighing just about .50 lb. For environments involving phosphate ester fluids, cartridges configured with EPDM seals are recommended; however, they must not be exposed to petroleum-based fluids which could damage these seals. Corrosion-resistant models are also available indicated by suffixes AP or LH in their model codes for enhanced durability in corrosive settings.
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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