SUN HYDRAULICS
DNDASDN828
$186.65 USD
- SUN HYDRAULICS
- Material:DNDASDN828
- Model:DNDA-SDN@828
- 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 DNDASDN828 (DNDASDN828) is a solenoid-operated 4-way, 2-position cartridge valve featuring a direct-acting, balanced spool design with a soft shift capability. This soft shift feature significantly reduces system shock during valve actuation, providing smoother transitions but at the cost of reduced performance limits compared to standard cartridges. It is particularly beneficial in applications where minimizing shock is important, although it should not be relied upon for precise timing control. For applications requiring accurate ramping or timing, Sun's electro-proportional valves are recommended instead. The response time of this valve varies between 150 ms and 300 ms depending on factors such as flow rate, pressure, coil voltage, oil viscosity, and ambient temperature. This valve includes a push-type manual override control; however, other manual control options cannot be ordered with the soft shift feature but can be installed later if needed. The solenoid tube assembly is designed to withstand fatigue at pressures up to 5000 psi (350 bar). Utilizing a wet armature design means the working fluid surrounds the armature and absorbs heat generated by the coil\u2014an important consideration when using fluids like water-glycol mixtures that may degrade over time under high temperatures. The DNDASDN828 model incorporates Sun's floating style construction to reduce the risk of internal parts binding due to excessive installation torque or machining variations in the cavity/cartridge. It offers various coil connector options rated up to IP69K for enhanced environmental protection. The valve fits into a T-31A cavity and has a capacity of handling up to 4 gpm (15 L/min), with minimal leakage at specified conditions. The overall design ensures high efficiency and reliable performance in hydraulic systems requiring smooth operation transitions.
The Sun Hydraulics DNDASDN828 (DNDASDN828) is a solenoid-operated 4-way, 2-position cartridge valve featuring a direct-acting, balanced spool design with a soft shift capability. This soft shift feature significantly reduces system shock during valve actuation, providing smoother transitions but at the cost of reduced performance limits compared to standard cartridges. It is particularly beneficial in applications where minimizing shock is important, although it should not be relied upon for precise timing control. For applications requiring accurate ramping or timing, Sun's electro-proportional valves are recommended instead. The response time of this valve varies between 150 ms and 300 ms depending on factors such as flow rate, pressure, coil voltage, oil viscosity, and ambient temperature. This valve includes a push-type manual override control; however, other manual control options cannot be ordered with the soft shift feature but can be installed later if needed. The solenoid tube assembly is designed to withstand fatigue at pressures up to 5000 psi (350 bar). Utilizing a wet armature design means the working fluid surrounds the armature and absorbs heat generated by the coil\u2014an important consideration when using fluids like water-glycol mixtures that may degrade over time under high temperatures. The DNDASDN828 model incorporates Sun's floating style construction to reduce the risk of internal parts binding due to excessive installation torque or machining variations in the cavity/cartridge. It offers various coil connector options rated up to IP69K for enhanced environmental protection. The valve fits into a T-31A cavity and has a capacity of handling up to 4 gpm (15 L/min), with minimal leakage at specified conditions. The overall design ensures high efficiency and reliable performance in hydraulic systems requiring smooth operation transitions.
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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