SUN HYDRAULICS
COHAEAN
$142.77 USD
- SUN HYDRAULICS
- Material:COHAEAN
- Model:COHA-EAN
- 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 COHAEAN (COHAEAN) is a robust, spring-biased closed, pilot-to-close check cartridge valve designed to ensure efficient flow control in hydraulic systems. This valve facilitates flow from port 1 to port 2 while reliably blocking reverse flow. It operates with a nominal pilot ratio of 1.8:1, meaning that a pressure of 1000 psi at the pilot port can close the valve against a pressure of 1800 psi at port 1. The innovative design prevents reverse flow under any condition and ensures that the valve remains closed with equal pressures at all ports. The COHAEAN model has been updated to include positive seals on the pilot pistons, aligning its functionality closely with later models in the series, which also feature positive seals. This enhancement has standardized the mechanical identity between earlier and later models while maintaining cost-effectiveness and availability. It is equipped to handle a maximum operating pressure of 5000 psi and has a capacity of up to 80 gpm (320 L/min). The valve's construction minimizes potential internal parts binding due to installation torque or cavity/cartridge machining variations, ensuring reliable and consistent performance. It features a T17A cavity, belongs to Series 3, and requires an installation torque of between 150 - 160 lbf ft. The COHAEAN weighs approximately 1.80 lbs and utilizes Viton seals for enhanced durability and resistance against various environmental conditions. This model is particularly suited for use in regeneration circuits where precise control over fluid handling and direction is paramount.
The Sun Hydraulics COHAEAN (COHAEAN) is a robust, spring-biased closed, pilot-to-close check cartridge valve designed to ensure efficient flow control in hydraulic systems. This valve facilitates flow from port 1 to port 2 while reliably blocking reverse flow. It operates with a nominal pilot ratio of 1.8:1, meaning that a pressure of 1000 psi at the pilot port can close the valve against a pressure of 1800 psi at port 1. The innovative design prevents reverse flow under any condition and ensures that the valve remains closed with equal pressures at all ports. The COHAEAN model has been updated to include positive seals on the pilot pistons, aligning its functionality closely with later models in the series, which also feature positive seals. This enhancement has standardized the mechanical identity between earlier and later models while maintaining cost-effectiveness and availability. It is equipped to handle a maximum operating pressure of 5000 psi and has a capacity of up to 80 gpm (320 L/min). The valve's construction minimizes potential internal parts binding due to installation torque or cavity/cartridge machining variations, ensuring reliable and consistent performance. It features a T17A cavity, belongs to Series 3, and requires an installation torque of between 150 - 160 lbf ft. The COHAEAN weighs approximately 1.80 lbs and utilizes Viton seals for enhanced durability and resistance against various environmental conditions. This model is particularly suited for use in regeneration circuits where precise control over fluid handling and direction is paramount.
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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