SUN HYDRAULICS
COFALFN
$79.32 USD
- SUN HYDRAULICS
- Material:COFALFN
- Model:COFA-LFN
- 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 COFALFN (COFALFN) is a 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 preventing reverse flow under any conditions, ensuring reliable operation in hydraulic systems. It operates such that pressure at the pilot port needs to effectively counteract a higher pressure at port 1 to maintain closure, specifically, a pilot pressure of 1000 psi can close the valve against a pressure of 1800 psi at port 1. Any reduction or temporary loss in pilot pressure may cause the valve to open, which is critical in applications requiring precise control over fluid handling. Designed for high-performance and durability, the COFALFN features Sun's floating style construction which minimizes potential internal binding that could result from excessive installation torque or variations in cavity/cartridge machining. This construction enhances the overall reliability and lifespan of the valve in demanding operational conditions. The valve is configured to handle maximum flow rates up to 40 gpm (160 L/min) and can withstand pressures up to 5000 psi (350 bar). It has minimal leakage specifications, not exceeding 1 drop per minute, which underscores its efficiency in maintaining system integrity. For environments involving phosphate ester fluids, cartridges with EPDM seals are recommended due to their compatibility and resistance to damage from petroleum-based fluids. This model also comes with specific installation requirements including an optimal torque range of 45-50 lbf ft (61-68 Nm) and uses Viton seals for enhanced performance under various operational conditions. The compact design weighs only .50 lb (0.25 kg), making it suitable for various hydraulic applications where space and weight are considerations.
The Sun Hydraulics COFALFN (COFALFN) is a 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 preventing reverse flow under any conditions, ensuring reliable operation in hydraulic systems. It operates such that pressure at the pilot port needs to effectively counteract a higher pressure at port 1 to maintain closure, specifically, a pilot pressure of 1000 psi can close the valve against a pressure of 1800 psi at port 1. Any reduction or temporary loss in pilot pressure may cause the valve to open, which is critical in applications requiring precise control over fluid handling. Designed for high-performance and durability, the COFALFN features Sun's floating style construction which minimizes potential internal binding that could result from excessive installation torque or variations in cavity/cartridge machining. This construction enhances the overall reliability and lifespan of the valve in demanding operational conditions. The valve is configured to handle maximum flow rates up to 40 gpm (160 L/min) and can withstand pressures up to 5000 psi (350 bar). It has minimal leakage specifications, not exceeding 1 drop per minute, which underscores its efficiency in maintaining system integrity. For environments involving phosphate ester fluids, cartridges with EPDM seals are recommended due to their compatibility and resistance to damage from petroleum-based fluids. This model also comes with specific installation requirements including an optimal torque range of 45-50 lbf ft (61-68 Nm) and uses Viton seals for enhanced performance under various operational conditions. The compact design weighs only .50 lb (0.25 kg), making it suitable for various hydraulic applications where space and weight are considerations.
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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