SUN HYDRAULICS
DNCALTN728
$170.06 USD
- SUN HYDRAULICS
- Material:DNCALTN728
- Model:DNCA-LTN@728
- 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 DNCALTN728 (DNCALTN728) is a solenoid-operated, 4-way, 2-position cartridge valve designed for direct-acting, balanced spool directional flow control. It features a closed transition between positions to minimize oil loss during shifting, making it especially beneficial in pilot control circuits. This valve operates optimally with port 3 as the inlet and port 1 as the tank; while reverse flow is possible, it may not perform consistently and is not recommended. The solenoid tube assembly is rated for fatigue at up to 5000 psi (350 bar), ensuring robust performance without requiring minimum hydraulic pressure for operation. Cartridges with EPDM seals are suitable for systems using phosphate ester fluids but should avoid petroleum-based fluids to prevent seal damage. The wet armature design allows the working fluid to surround the armature, which can be affected by coil-generated heat over prolonged periods. This can lead to fluid breakdown in certain mixtures like water-glycol over time. The DNCALTN728 offers various coil termination and voltage options, including surge protection capabilities. Its efficient magnetic design provides high spool actuation force per watt of energy used, ensuring reliable valve shifting. Coils are interchangeable with other Sun Series 1 solenoid products and can be mounted in either direction on the tube. Connector options provide ratings up to IP69K for enhanced environmental protection, with additional weatherized coils available. The valve incorporates a floating style construction to reduce binding risks from excessive installation torque or machining variations. With a capacity of 8 gpm (30 L/min), a maximum operating pressure of 5000 psi (350 bar), and a typical response time of 50 ms, this model supports high-frequency switching up to 15,000 cycles per hour. It requires minimal manual override force and features customizable components such as Viton seal kits for both cartridge and coil assemblies.
The Sun Hydraulics DNCALTN728 (DNCALTN728) is a solenoid-operated, 4-way, 2-position cartridge valve designed for direct-acting, balanced spool directional flow control. It features a closed transition between positions to minimize oil loss during shifting, making it especially beneficial in pilot control circuits. This valve operates optimally with port 3 as the inlet and port 1 as the tank; while reverse flow is possible, it may not perform consistently and is not recommended. The solenoid tube assembly is rated for fatigue at up to 5000 psi (350 bar), ensuring robust performance without requiring minimum hydraulic pressure for operation. Cartridges with EPDM seals are suitable for systems using phosphate ester fluids but should avoid petroleum-based fluids to prevent seal damage. The wet armature design allows the working fluid to surround the armature, which can be affected by coil-generated heat over prolonged periods. This can lead to fluid breakdown in certain mixtures like water-glycol over time. The DNCALTN728 offers various coil termination and voltage options, including surge protection capabilities. Its efficient magnetic design provides high spool actuation force per watt of energy used, ensuring reliable valve shifting. Coils are interchangeable with other Sun Series 1 solenoid products and can be mounted in either direction on the tube. Connector options provide ratings up to IP69K for enhanced environmental protection, with additional weatherized coils available. The valve incorporates a floating style construction to reduce binding risks from excessive installation torque or machining variations. With a capacity of 8 gpm (30 L/min), a maximum operating pressure of 5000 psi (350 bar), and a typical response time of 50 ms, this model supports high-frequency switching up to 15,000 cycles per hour. It requires minimal manual override force and features customizable components such as Viton seal kits for both cartridge and coil assemblies.
This solenoid-operated, 4-way, 2-position cartridge is a direct-acting, balanced spool directional valve. The transition between positions is closed. The closed transition greatly reduces the loss of oil when shifting which can be of particular importance in pilot control circuits.
- Valve capacity is based on port 3 as the inlet and port 1 as the tank. Although reverse flow is possible, the same performance cannot be guaranteed and is not recommended.
- The solenoid tube assembly is fatigue rated for 5000 psi (350 bar) service.
- This valve is direct actuated and requires no minimum hydraulic pressure for operation.
- 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.
- This valve utilizes a wet armature design. This means that the working fluid surrounds the armature and is exposed to the heat generated by the coil. This can be a factor if the coil is energized for long periods of time. Some fluids, notably water/glycol mixtures, break down at these temperatures over time and form varnishes that will affect the function of the cartridge.
- A wide variety of coil termination and voltage options are available, with and without surge protection. See the CONFIGURATION section.
- The solenoid's unique magnetic design results in a high efficiency solenoid, yielding high spool actuating force per Watt expended, leading to reliable valve shifting.
- Coils are interchangeable with other Sun Series 1 solenoid products and can be mounted on the tube in either direction.
- Coil connector options offer ratings up to IP69K. See individual coil product pages for details. Additional weatherized coils and kits are available for more complete environmental protection.
- 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-31A |
| Series | 1 |
| Capacity | 8 gpm30 L/min. |
| Maximum Operating Pressure | 5000 psi350 bar |
| Response Time - Typical | 50 ms50 ms |
| Maximum Valve Leakage at 110 SUS (24 cSt) | 10 in³/min.@3000 psi160 cc/min.@210 bar |
| Switching Frequency | 15000 cycles/hr15000 cycles/hr |
| Manual Override Force Requirement | 5 lbs/1000 psi @ Port 133 N/100 bar @ Port 1 |
| Manual Override Stroke | .10 in.2,5 mm |
| Solenoid Tube Diameter | .75 in.19 mm |
| Valve Hex Size | 7/8 in.22,2 mm |
| Valve Installation Torque | 30 - 35 lbf ft41 - 47 Nm |
| Model Weight | .60 lb0,30 kg |
| Seal kit - Cartridge | Viton: 990-431-006 |
| Seal and nut kit - Coil | Viton: 990-770-006Viton: 990-770-006 |
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