SUN HYDRAULICS
COJBXBN
$303.00 USD
- SUN HYDRAULICS
- Material:COJBXBN
- Model:COJB-XBN
- 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 COJBXBN (COJBXBN) is a high-performance, pilot-to-close check cartridge valve designed for hydraulic applications requiring controlled flow and reverse flow prevention. This valve allows fluid to flow from port 1 to port 2 while blocking any reverse flow from port 2 back to port 1, ensuring operational integrity and safety in hydraulic systems. It features a nominal pilot ratio of 1.8:1, meaning that it can close against higher pressures at port 1 with appropriate pilot pressure at the pilot port, making it highly effective in regeneration circuits where such control is critical. The COJBXBN valve operates up to a maximum pressure of 5000 psi (350 bar) and can handle flows up to 160 gpm (610 L/min), showcasing its capability in handling substantial hydraulic loads. The design incorporates Sun's floating style construction which minimizes internal parts binding\u2014a common issue due to excessive installation torque or variations in cavity/cartridge machining. This construction enhances the reliability and longevity of the valve under various operational conditions. Additionally, this model has been optimized over time; initially, COA models lacked a positive seal on the pilot pistons which was present in COB models. However, improvements have been made so that both models now feature positive sealing and are mechanically identical, with COA models being more accessible and cost-effective. The valve's robust design ensures minimal leakage (less than one drop per minute), further emphasizing its efficiency and effectiveness in critical hydraulic applications where precision and reliability are paramount.
The Sun Hydraulics COJBXBN (COJBXBN) is a high-performance, pilot-to-close check cartridge valve designed for hydraulic applications requiring controlled flow and reverse flow prevention. This valve allows fluid to flow from port 1 to port 2 while blocking any reverse flow from port 2 back to port 1, ensuring operational integrity and safety in hydraulic systems. It features a nominal pilot ratio of 1.8:1, meaning that it can close against higher pressures at port 1 with appropriate pilot pressure at the pilot port, making it highly effective in regeneration circuits where such control is critical. The COJBXBN valve operates up to a maximum pressure of 5000 psi (350 bar) and can handle flows up to 160 gpm (610 L/min), showcasing its capability in handling substantial hydraulic loads. The design incorporates Sun's floating style construction which minimizes internal parts binding\u2014a common issue due to excessive installation torque or variations in cavity/cartridge machining. This construction enhances the reliability and longevity of the valve under various operational conditions. Additionally, this model has been optimized over time; initially, COA models lacked a positive seal on the pilot pistons which was present in COB models. However, improvements have been made so that both models now feature positive sealing and are mechanically identical, with COA models being more accessible and cost-effective. The valve's robust design ensures minimal leakage (less than one drop per minute), further emphasizing its efficiency and effectiveness in critical hydraulic applications where precision and reliability are 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.
- 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-19A |
| Series | 4 |
| Capacity | 160 gpm610 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 5/8 in.41,3 mm |
| Valve Installation Torque | 350 - 375 lbf ft474 - 508 Nm |
| Model Weight | 2.60 lb1,20 kg |
| Seal kit - Cartridge | Viton: 990-019-006 |
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