SUN HYDRAULICS
COHAEFN
$142.77 USD
- SUN HYDRAULICS
- Material:COHAEFN
- Model:COHA-EFN
- 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 COHAEFN (COHAEFN) is a high-performance, pilot-to-close check cartridge valve designed for hydraulic applications requiring reliable control of fluid flow direction. This valve facilitates flow from port 1 to port 2 while effectively blocking any reverse flow from port 2 to port 1, ensuring operational stability and safety. With a nominal pilot ratio of 1.8:1, the COHAEFN can close against higher pressures at port 1 when the appropriate pressure is applied at the pilot port, making it suitable for high-pressure applications up to 5000 psi (350 bar). The COHAEFN features Sun Hydraulics' innovative floating style construction which minimizes the risk of internal parts binding\u2014a common issue in valves due to excessive installation torque or cavity/cartridge machining variations. This design enhances the valve's durability and reliability in demanding environments. The valve also boasts a maximum capacity of 80 gpm (320 L/min), accommodating substantial fluid volumes, which makes it ideal for use in regeneration circuits where control over large flow and pressure is necessary. Additionally, the COHAEFN valve has been engineered to maintain tight leakage control, allowing no more than one drop per minute at 110 SUS (24 cSt), which speaks to its efficiency and effectiveness in preventing fluid loss. Installation specifications include a hex size of 1-1/4 inches (31.8 mm) and an installation torque range of 150-160 lbf ft (203-217 Nm), with a total model weight of approximately 1.80 lbs (0.80 kg). This product uses Viton seals for enhanced chemical resistance and durability under various operating conditions. Overall, the Sun Hydraulics COHAEFN check cartridge is an essential component for hydraulic systems requiring precise flow direction control and high-pressure operation, combined with robust construction and reliable performance.
The Sun Hydraulics COHAEFN (COHAEFN) is a high-performance, pilot-to-close check cartridge valve designed for hydraulic applications requiring reliable control of fluid flow direction. This valve facilitates flow from port 1 to port 2 while effectively blocking any reverse flow from port 2 to port 1, ensuring operational stability and safety. With a nominal pilot ratio of 1.8:1, the COHAEFN can close against higher pressures at port 1 when the appropriate pressure is applied at the pilot port, making it suitable for high-pressure applications up to 5000 psi (350 bar). The COHAEFN features Sun Hydraulics' innovative floating style construction which minimizes the risk of internal parts binding\u2014a common issue in valves due to excessive installation torque or cavity/cartridge machining variations. This design enhances the valve's durability and reliability in demanding environments. The valve also boasts a maximum capacity of 80 gpm (320 L/min), accommodating substantial fluid volumes, which makes it ideal for use in regeneration circuits where control over large flow and pressure is necessary. Additionally, the COHAEFN valve has been engineered to maintain tight leakage control, allowing no more than one drop per minute at 110 SUS (24 cSt), which speaks to its efficiency and effectiveness in preventing fluid loss. Installation specifications include a hex size of 1-1/4 inches (31.8 mm) and an installation torque range of 150-160 lbf ft (203-217 Nm), with a total model weight of approximately 1.80 lbs (0.80 kg). This product uses Viton seals for enhanced chemical resistance and durability under various operating conditions. Overall, the Sun Hydraulics COHAEFN check cartridge is an essential component for hydraulic systems requiring precise flow direction control and high-pressure operation, combined with robust construction and reliable performance.
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.
- 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-17A |
| Series | 3 |
| Capacity | 80 gpm320 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 1/4 in.31,8 mm |
| Valve Installation Torque | 150 - 160 lbf ft203 - 217 Nm |
| Model Weight | 1.80 lb0,80 kg |
| Seal kit - Cartridge | Viton: 990-017-006 |
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