SUN HYDRAULICS
COFALDN
$79.90 USD
Tags:
- SUN HYDRAULICS
- Material:COFALDN
- Model:COFA-LDN
- 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 COFALDN (COFALDN) is a high-performance spring biased closed, pilot-to-close check cartridge valve with a nominal pilot ratio of 1.8:1. This valve facilitates flow from port 1 to port 2 while effectively blocking any reverse flow from port 2 to port 1 under all conditions, ensuring reliable operation in hydraulic systems. The pressure at the pilot port needs to be adequately maintained as it opposes the pressure at port 1 with a ratio of 1.8:1; a drop in pilot pressure can momentarily open the valve. Designed for use primarily in regeneration circuits, the COFALDN valve is critical for applications where control of hydraulic flow and direction are necessary. The valve's maximum operating pressure reaches up to 5000 psi (350 bar), and it has a flow capacity of up to 40 gpm (160 L/min), making it suitable for various demanding hydraulic tasks. Its construction incorporates Sun\u2019s floating style design which minimizes internal parts binding, an issue that could arise from excessive installation torque or cavity/cartridge machining variations. The cartridge is also available with EPDM seals specifically for systems using phosphate ester fluids; however, these seals must not be exposed to petroleum-based fluids which can cause damage. For environments prone to corrosion, models with suffix AP or LH are recommended as they are designed to resist corrosive elements effectively. Key specifications include a maximum leakage at 110 SUS (24 cSt) being minimal at approximately one drop per minute, and installation requires torque between 45 -50 lbf.ft (61 \u201368 Nm). The model itself weighs about .50 lb (0.25 kg), ensuring that it does not add significant weight to the system it is integrated into. This model uses Viton seals for enhanced performance and durability under various operational conditions.
The Sun Hydraulics COFALDN (COFALDN) is a high-performance spring biased closed, pilot-to-close check cartridge valve with a nominal pilot ratio of 1.8:1. This valve facilitates flow from port 1 to port 2 while effectively blocking any reverse flow from port 2 to port 1 under all conditions, ensuring reliable operation in hydraulic systems. The pressure at the pilot port needs to be adequately maintained as it opposes the pressure at port 1 with a ratio of 1.8:1; a drop in pilot pressure can momentarily open the valve. Designed for use primarily in regeneration circuits, the COFALDN valve is critical for applications where control of hydraulic flow and direction are necessary. The valve's maximum operating pressure reaches up to 5000 psi (350 bar), and it has a flow capacity of up to 40 gpm (160 L/min), making it suitable for various demanding hydraulic tasks. Its construction incorporates Sun\u2019s floating style design which minimizes internal parts binding, an issue that could arise from excessive installation torque or cavity/cartridge machining variations. The cartridge is also available with EPDM seals specifically for systems using phosphate ester fluids; however, these seals must not be exposed to petroleum-based fluids which can cause damage. For environments prone to corrosion, models with suffix AP or LH are recommended as they are designed to resist corrosive elements effectively. Key specifications include a maximum leakage at 110 SUS (24 cSt) being minimal at approximately one drop per minute, and installation requires torque between 45 -50 lbf.ft (61 \u201368 Nm). The model itself weighs about .50 lb (0.25 kg), ensuring that it does not add significant weight to the system it is integrated into. This model uses Viton seals for enhanced performance and durability under various 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 |
Show FAQ