SUN HYDRAULICS
COFALAV
$87.27 USD
- SUN HYDRAULICS
- Material:COFALAV
- Model:COFA-LAV
- 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 COFALAV (COFALAV) is a precision-engineered check cartridge valve designed for hydraulic systems requiring reliable, pilot-to-close functionality. This valve is specifically configured to allow flow from port 1 to port 2 while completely blocking any reverse flow from port 2 to port 1 under all conditions. It operates with a nominal pilot ratio of 1.8:1, meaning that a pilot pressure of 1000 psi can close the valve against a higher pressure of up to 1800 psi at port 1. This feature makes it particularly useful in regeneration circuits where control over flow and direction is crucial. The COFALAV valve incorporates Sun Hydraulics' floating style construction, which reduces the risk of internal parts binding due to excessive installation torque or variations in cavity/cartridge machining. This design enhances the overall reliability and performance of the valve in demanding operational conditions. The valve's maximum operating pressure capability reaches up to 5000 psi, and it has a flow capacity of up to 40 gpm. It also features minimal leakage rates at high fluid viscosities, ensuring efficient operation. For environments involving corrosive substances or special fluid types like phosphate ester fluids, cartridges configured with EPDM seals are recommended, although these should not be exposed to petroleum-based fluids which could degrade the seals. The standard model comes with Viton seals which provide robust performance under typical conditions. With an installation torque requirement between 45 - 50 lbf ft and a hex size of 1-1/8 inches, the COFALAV ensures ease of installation while maintaining a compact and efficient design footprint weighing just .50 lb. This combination of features makes the COFALAV an optimal choice for hydraulic systems requiring precise control over fluid flow and direction under varied and challenging operational conditions.
The Sun Hydraulics COFALAV (COFALAV) is a precision-engineered check cartridge valve designed for hydraulic systems requiring reliable, pilot-to-close functionality. This valve is specifically configured to allow flow from port 1 to port 2 while completely blocking any reverse flow from port 2 to port 1 under all conditions. It operates with a nominal pilot ratio of 1.8:1, meaning that a pilot pressure of 1000 psi can close the valve against a higher pressure of up to 1800 psi at port 1. This feature makes it particularly useful in regeneration circuits where control over flow and direction is crucial. The COFALAV valve incorporates Sun Hydraulics' floating style construction, which reduces the risk of internal parts binding due to excessive installation torque or variations in cavity/cartridge machining. This design enhances the overall reliability and performance of the valve in demanding operational conditions. The valve's maximum operating pressure capability reaches up to 5000 psi, and it has a flow capacity of up to 40 gpm. It also features minimal leakage rates at high fluid viscosities, ensuring efficient operation. For environments involving corrosive substances or special fluid types like phosphate ester fluids, cartridges configured with EPDM seals are recommended, although these should not be exposed to petroleum-based fluids which could degrade the seals. The standard model comes with Viton seals which provide robust performance under typical conditions. With an installation torque requirement between 45 - 50 lbf ft and a hex size of 1-1/8 inches, the COFALAV ensures ease of installation while maintaining a compact and efficient design footprint weighing just .50 lb. This combination of features makes the COFALAV an optimal choice for hydraulic systems requiring precise control over fluid flow and direction under varied and challenging operational conditions.
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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