SUN HYDRAULICS
DNDASTN812
$182.97 USD
- SUN HYDRAULICS
- Material:DNDASTN812
- Model:DNDA-STN@812
- 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 DNDASTN812 (DNDASTN812) is a solenoid-operated 4-way, 2-position cartridge valve designed for precise directional control in hydraulic systems. This direct-acting, balanced spool directional valve features a soft shift capability to significantly reduce system shock during actuation. While the soft shift feature lowers performance limits compared to standard cartridges, it effectively minimizes shock but is not recommended for applications requiring precise timing control; for such needs, electroproportional valves are suggested. The response time of this valve ranges from 150 ms to 300 ms and varies based on flow, pressure, coil voltage, oil viscosity, and ambient temperature. For consistent performance, port 1 should maintain positive pressure. The DNDASTN812 includes a push-type manual override control option; however, other manual control options like T or D cannot be ordered with the soft shift but can be installed later if needed. The solenoid tube assembly is fatigue-rated for up to 5000 psi (350 bar), and its wet armature design ensures efficient operation by using the surrounding working fluid to dissipate heat generated by the coil. It\u2019s important to note that certain fluids may degrade under prolonged exposure to high temperatures. The valve's construction incorporates Sun\u2019s floating style design to prevent internal binding due to excessive installation torque or machining variations. It has a capacity of 4 gpm (15 L/min) and a maximum operating pressure of 5000 psi (350 bar). The DNDASTN812 also offers coil connector options with ratings up to IP69K for enhanced environmental protection. With its high-efficiency solenoid design yielding reliable shifting and minimal leakage rates at specified conditions, this model provides robust functionality in demanding hydraulic applications.
The Sun Hydraulics DNDASTN812 (DNDASTN812) is a solenoid-operated 4-way, 2-position cartridge valve designed for precise directional control in hydraulic systems. This direct-acting, balanced spool directional valve features a soft shift capability to significantly reduce system shock during actuation. While the soft shift feature lowers performance limits compared to standard cartridges, it effectively minimizes shock but is not recommended for applications requiring precise timing control; for such needs, electroproportional valves are suggested. The response time of this valve ranges from 150 ms to 300 ms and varies based on flow, pressure, coil voltage, oil viscosity, and ambient temperature. For consistent performance, port 1 should maintain positive pressure. The DNDASTN812 includes a push-type manual override control option; however, other manual control options like T or D cannot be ordered with the soft shift but can be installed later if needed. The solenoid tube assembly is fatigue-rated for up to 5000 psi (350 bar), and its wet armature design ensures efficient operation by using the surrounding working fluid to dissipate heat generated by the coil. It\u2019s important to note that certain fluids may degrade under prolonged exposure to high temperatures. The valve's construction incorporates Sun\u2019s floating style design to prevent internal binding due to excessive installation torque or machining variations. It has a capacity of 4 gpm (15 L/min) and a maximum operating pressure of 5000 psi (350 bar). The DNDASTN812 also offers coil connector options with ratings up to IP69K for enhanced environmental protection. With its high-efficiency solenoid design yielding reliable shifting and minimal leakage rates at specified conditions, this model provides robust functionality in demanding hydraulic applications.
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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