SUN HYDRAULICS
COFALDV
$87.27 USD
- SUN HYDRAULICS
- Material:COFALDV
- Model:COFA-LDV
- 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 COFALDV (COFALDV) is a high-performance, pilot-to-close check cartridge valve designed for precise hydraulic flow control. This valve facilitates flow from port 1 to port 2 while effectively blocking reverse flow, ensuring reliable operation in hydraulic circuits. With a nominal pilot ratio of 1.8:1, the COFALDV can close against higher pressure at port 1 when the appropriate pressure is applied at the pilot port. This feature makes it particularly useful in regeneration circuits where control over reverse flow and pressure regulation is critical. The valve's maximum operating pressure stands at an impressive 5000 psi (350 bar), and it supports a flow capacity up to 40 gpm (160 L/min), making it suitable for robust hydraulic applications. It incorporates Sun's floating style construction which minimizes internal part binding and potential damage due to installation issues or cavity/cartridge machining variations. For environments involving corrosive substances or requiring stringent cleanliness standards, cartridges configured with EPDM seals are recommended, especially when using phosphate ester fluids. It\u2019s important to avoid exposure to petroleum-based fluids with these seal types as they can degrade the material. The COFALDV also features a T2A cavity and Series 2 configuration, with an installation torque requirement between 45-50 lbf ft (61-68 Nm). The compact design weighs only .50 lb (0.25 kg), facilitating easy integration into existing systems without significant modifications. This valve model ensures minimal leakage, maintaining efficiency with maximum leakage at just about one drop per minute under specific conditions. Overall, the Sun Hydraulics COFALDV valve represents a robust option for system designers seeking reliable performance in demanding hydraulic applications, ensuring both efficiency and durability.
The Sun Hydraulics COFALDV (COFALDV) is a high-performance, pilot-to-close check cartridge valve designed for precise hydraulic flow control. This valve facilitates flow from port 1 to port 2 while effectively blocking reverse flow, ensuring reliable operation in hydraulic circuits. With a nominal pilot ratio of 1.8:1, the COFALDV can close against higher pressure at port 1 when the appropriate pressure is applied at the pilot port. This feature makes it particularly useful in regeneration circuits where control over reverse flow and pressure regulation is critical. The valve's maximum operating pressure stands at an impressive 5000 psi (350 bar), and it supports a flow capacity up to 40 gpm (160 L/min), making it suitable for robust hydraulic applications. It incorporates Sun's floating style construction which minimizes internal part binding and potential damage due to installation issues or cavity/cartridge machining variations. For environments involving corrosive substances or requiring stringent cleanliness standards, cartridges configured with EPDM seals are recommended, especially when using phosphate ester fluids. It\u2019s important to avoid exposure to petroleum-based fluids with these seal types as they can degrade the material. The COFALDV also features a T2A cavity and Series 2 configuration, with an installation torque requirement between 45-50 lbf ft (61-68 Nm). The compact design weighs only .50 lb (0.25 kg), facilitating easy integration into existing systems without significant modifications. This valve model ensures minimal leakage, maintaining efficiency with maximum leakage at just about one drop per minute under specific conditions. Overall, the Sun Hydraulics COFALDV valve represents a robust option for system designers seeking reliable performance in demanding hydraulic applications, ensuring both efficiency and durability.
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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