SUN HYDRAULICS
COFALFV
$87.27 USD
- SUN HYDRAULICS
- Material:COFALFV
- Model:COFA-LFV
- 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 COFALFV (COFALFV) is a sophisticated spring-biased closed, pilot-to-close check cartridge with a nominal pilot ratio of 1.8:1. This valve facilitates flow from port 1 to port 2 while securely blocking any reverse flow from port 2 back to port 1, ensuring operational integrity in various hydraulic systems. It is particularly effective in regeneration circuits where control and prevention of reverse flow are critical. The valve operates under the principle that pressure at the pilot port can close the valve against higher pressures at port 1, with a specific example being a pilot pressure of 1000 psi which can close against a pressure of 1800 psi at port 1. The unique design ensures that any loss or decay in pilot pressure could momentarily allow the valve to open, providing sensitive response to changes in system pressure. Furthermore, it boasts an impressive maximum operating pressure capacity of up to 5000 psi and can handle flow rates up to 40 gpm. Sun Hydraulics has engineered this model with robust construction features including Sun's floating style construction which minimizes internal parts binding due to variations in installation torque or cavity/cartridge machining errors. This feature enhances reliability and longevity of the valve under demanding conditions. The model also incorporates EPDM seals suited for systems using phosphate ester fluids, though these seals must avoid exposure to petroleum-based fluids which could cause damage. Designed for ease of installation and maintenance, COFALFV has an installation torque requirement ranging between 45-50 lbf ft and comes equipped with a standard T2A cavity interface. Its compact design weighs only .50 lb, making it lightweight yet durable enough for challenging industrial applications.
The Sun Hydraulics COFALFV (COFALFV) is a sophisticated spring-biased closed, pilot-to-close check cartridge with a nominal pilot ratio of 1.8:1. This valve facilitates flow from port 1 to port 2 while securely blocking any reverse flow from port 2 back to port 1, ensuring operational integrity in various hydraulic systems. It is particularly effective in regeneration circuits where control and prevention of reverse flow are critical. The valve operates under the principle that pressure at the pilot port can close the valve against higher pressures at port 1, with a specific example being a pilot pressure of 1000 psi which can close against a pressure of 1800 psi at port 1. The unique design ensures that any loss or decay in pilot pressure could momentarily allow the valve to open, providing sensitive response to changes in system pressure. Furthermore, it boasts an impressive maximum operating pressure capacity of up to 5000 psi and can handle flow rates up to 40 gpm. Sun Hydraulics has engineered this model with robust construction features including Sun's floating style construction which minimizes internal parts binding due to variations in installation torque or cavity/cartridge machining errors. This feature enhances reliability and longevity of the valve under demanding conditions. The model also incorporates EPDM seals suited for systems using phosphate ester fluids, though these seals must avoid exposure to petroleum-based fluids which could cause damage. Designed for ease of installation and maintenance, COFALFV has an installation torque requirement ranging between 45-50 lbf ft and comes equipped with a standard T2A cavity interface. Its compact design weighs only .50 lb, making it lightweight yet durable enough for challenging industrial applications.
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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