SUN HYDRAULICS
DNDASRN812
$182.97 USD
- SUN HYDRAULICS
- Material:DNDASRN812
- Model:DNDA-SRN@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 DNDASRN812 (DNDASRN812) is a solenoid-operated 4-way, 2-position cartridge valve designed with a direct-acting, balanced spool and a soft shift feature that significantly reduces system shock during valve actuation. This soft shift capability makes it an ideal choice for applications where minimizing hydraulic shock is crucial, although it is not suitable for scenarios requiring precise timing control. The valve offers interchangeability with standard cartridges but operates within lower performance limits. The response time of this model ranges between 150 ms to 300 ms, influenced by factors such as flow, pressure, coil voltage, oil viscosity, and ambient temperature. For optimal performance of the soft shift feature, port 1 should maintain positive pressure. This model includes a push-type manual override control; however, other manual control options are available for field installation but are incompatible with weatherized coils. The solenoid tube assembly is rated for fatigue at pressures up to 5000 psi (350 bar), and the robust wet armature design ensures high efficiency and reliable valve shifting by generating significant spool actuating force per watt expended. The DNDASRN812 incorporates Sun's floating style construction to reduce internal part binding risks due to excessive installation torque or machining variations in cavity/cartridge configurations. It fits the T-31A cavity series with a capacity of 4 gpm (15 L/min) and has a maximum operating pressure of 5000 psi (350 bar). Valve leakage remains minimal at specified conditions, while coil connector options provide ratings up to IP69K for enhanced environmental protection. Additional weatherized coils and kits can be utilized for more comprehensive protection in harsh environments.
The Sun Hydraulics DNDASRN812 (DNDASRN812) is a solenoid-operated 4-way, 2-position cartridge valve designed with a direct-acting, balanced spool and a soft shift feature that significantly reduces system shock during valve actuation. This soft shift capability makes it an ideal choice for applications where minimizing hydraulic shock is crucial, although it is not suitable for scenarios requiring precise timing control. The valve offers interchangeability with standard cartridges but operates within lower performance limits. The response time of this model ranges between 150 ms to 300 ms, influenced by factors such as flow, pressure, coil voltage, oil viscosity, and ambient temperature. For optimal performance of the soft shift feature, port 1 should maintain positive pressure. This model includes a push-type manual override control; however, other manual control options are available for field installation but are incompatible with weatherized coils. The solenoid tube assembly is rated for fatigue at pressures up to 5000 psi (350 bar), and the robust wet armature design ensures high efficiency and reliable valve shifting by generating significant spool actuating force per watt expended. The DNDASRN812 incorporates Sun's floating style construction to reduce internal part binding risks due to excessive installation torque or machining variations in cavity/cartridge configurations. It fits the T-31A cavity series with a capacity of 4 gpm (15 L/min) and has a maximum operating pressure of 5000 psi (350 bar). Valve leakage remains minimal at specified conditions, while coil connector options provide ratings up to IP69K for enhanced environmental protection. Additional weatherized coils and kits can be utilized for more comprehensive protection in harsh environments.
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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