SUN HYDRAULICS
COFAXBE
$240.46 USD
- SUN HYDRAULICS
- Material:COFAXBE
- Model:COFA-XBE
- 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 COFAXBE (COFAXBE) is a spring-biased closed, pilot-to-close check cartridge valve with a 1.8:1 pilot ratio, designed to allow flow from port 1 to port 2 while blocking reverse flow. This valve operates under the principle where pressure at the pilot port opposes the pressure at port 1 with a ratio of 1.8:1, meaning that a pressure of 1000 psi at the pilot port can close the valve against a pressure of 1800 psi at port 1. It is specifically useful in regeneration circuits and is designed to remain closed with equal pressures at all ports, ensuring no reverse flow from port 2 to port 1 under any conditions. The COFAXBE incorporates Sun's floating style construction which minimizes internal parts binding that could be caused by excessive installation torque or variations in cavity/cartridge machining. With a maximum operating pressure of 5000 psi and capacity up to 40 gpm, it suits high-demand systems. The valve also features minimal leakage rates (approximately one drop per minute) and requires an installation torque between 45 - 50 lbf ft. This cartridge also offers options for environments requiring corrosion resistance or special fluid compatibility; models with EPDM seals are available for systems using phosphate ester fluids. However, these should not be exposed to petroleum-based fluids which could damage the seals. Its robust design ensures reliability and performance consistency in challenging operational conditions, making it an essential component for hydraulic systems requiring precise control over fluid handling and directionality.
The Sun Hydraulics COFAXBE (COFAXBE) is a spring-biased closed, pilot-to-close check cartridge valve with a 1.8:1 pilot ratio, designed to allow flow from port 1 to port 2 while blocking reverse flow. This valve operates under the principle where pressure at the pilot port opposes the pressure at port 1 with a ratio of 1.8:1, meaning that a pressure of 1000 psi at the pilot port can close the valve against a pressure of 1800 psi at port 1. It is specifically useful in regeneration circuits and is designed to remain closed with equal pressures at all ports, ensuring no reverse flow from port 2 to port 1 under any conditions. The COFAXBE incorporates Sun's floating style construction which minimizes internal parts binding that could be caused by excessive installation torque or variations in cavity/cartridge machining. With a maximum operating pressure of 5000 psi and capacity up to 40 gpm, it suits high-demand systems. The valve also features minimal leakage rates (approximately one drop per minute) and requires an installation torque between 45 - 50 lbf ft. This cartridge also offers options for environments requiring corrosion resistance or special fluid compatibility; models with EPDM seals are available for systems using phosphate ester fluids. However, these should not be exposed to petroleum-based fluids which could damage the seals. Its robust design ensures reliability and performance consistency in challenging operational conditions, making it an essential component for hydraulic systems requiring precise control over fluid handling and directionality.
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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