SUN HYDRAULICS
DNDASLN297
$213.85 USD
- SUN HYDRAULICS
- Material:DNDASLN297
- Model:DNDA-SLN@297
- 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 DNDASLN297 (DNDASLN297) is a solenoid-operated 4-way, 2-position cartridge valve designed for direct-acting, balanced spool directional control with a soft shift feature to minimize system shock during valve actuation. This soft shift mechanism reduces performance limits compared to standard cartridges and extends response times, which can vary between 150 ms to 300 ms depending on factors like flow, pressure, coil voltage, oil viscosity, and ambient temperature. The valve is especially beneficial in applications where reducing hydraulic shock is more critical than precise timing. It includes a push-type manual override control but cannot support other manual options in its soft shift configuration unless modified in the field. The solenoid tube assembly is rated for fatigue at pressures up to 5000 psi (350 bar), and the wet armature design helps dissipate heat generated by the coil. However, this can be an issue with certain fluids like water-glycol mixtures that may degrade over time due to heat exposure. The valve's high-efficiency solenoid provides significant spool actuating force per watt for reliable operation. With a capacity of 4 gpm (15 L/min) and leakage limited to 10 in\u00b3/min at 3000 psi (160 cc/min at 210 bar), it incorporates Sun's floating style construction to reduce internal binding risks from installation torque or machining variations. The DNDASLN297 fits into cavity T-31A and weighs approximately .60 lb (.30 kg). For sealing needs, Viton seal kits are available under part number 990431006.
The Sun Hydraulics DNDASLN297 (DNDASLN297) is a solenoid-operated 4-way, 2-position cartridge valve designed for direct-acting, balanced spool directional control with a soft shift feature to minimize system shock during valve actuation. This soft shift mechanism reduces performance limits compared to standard cartridges and extends response times, which can vary between 150 ms to 300 ms depending on factors like flow, pressure, coil voltage, oil viscosity, and ambient temperature. The valve is especially beneficial in applications where reducing hydraulic shock is more critical than precise timing. It includes a push-type manual override control but cannot support other manual options in its soft shift configuration unless modified in the field. The solenoid tube assembly is rated for fatigue at pressures up to 5000 psi (350 bar), and the wet armature design helps dissipate heat generated by the coil. However, this can be an issue with certain fluids like water-glycol mixtures that may degrade over time due to heat exposure. The valve's high-efficiency solenoid provides significant spool actuating force per watt for reliable operation. With a capacity of 4 gpm (15 L/min) and leakage limited to 10 in\u00b3/min at 3000 psi (160 cc/min at 210 bar), it incorporates Sun's floating style construction to reduce internal binding risks from installation torque or machining variations. The DNDASLN297 fits into cavity T-31A and weighs approximately .60 lb (.30 kg). For sealing needs, Viton seal kits are available under part number 990431006.
This solenoid-operated 4-way, 2-position cartridge is a direct-acting, balanced spool directional valve with a soft shift feature. The soft shift feature greatly reduces system shock due to valve actuation.
- The soft shift cartridge is interchangeable with the standard cartridge, however, the performance limits are lower.
- The soft shift feature can greatly reduce shock due to valve actuation but should not be counted upon in applications where timing is critical. If you need accurate ramping or timing control, consider Sun's electro-proportional valves.
- The soft shift feature results in significant increase in response time over Sun's standard solenoid. Response time is dependant on flow, pressure, coil voltage, oil viscosity and ambient temperature. Typical response time ranges from 150 ms to 300 ms.
- For consistent soft shift performance, port 1 should be at a positive pressure.
- This valve includes a push-type manual override control. Other manual control options such as T or D, cannot be ordered with the soft shift control but can be installed easily in the field. See Twist/Lock Manual Override link above for details. Please note: Manual override functionality is not compatible with weatherized coils.
- The solenoid tube assembly is fatigue rated for 5000 psi (350 bar) service.
- 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.
- 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.
- 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 | 4 gpm15 L/min. |
| Maximum Operating Pressure | 5000 psi350 bar |
| Maximum Valve Leakage at 110 SUS (24 cSt) | 10 in³/min.@3000 psi160 cc/min.@210 bar |
| 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 |
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