SUN HYDRAULICS
DNDCXHE728

***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 DNDCXHE728 (DNDCXHE728) is a direct acting, solenoid-operated, 4-way, 3-position spool valve designed for precision fluid control in hydraulic systems. This valve is spring-centered to the neutral position and features a robust solenoid tube assembly rated for fatigue at 5000 psi (350 bar), ensuring reliable performance under high-pressure conditions. It operates without requiring a minimum hydraulic pressure, making it highly versatile. When coil A is energized, the flow transitions from port 3 P to port 2 A and from port 4 B to port 1 T, while energizing coil B directs flow from port 3 to port 4 and from port 2 to port 1. This valve is optimized for differential flow circuits where higher return flow should be directed through port 2 A to port 1 T. The wet armature design allows the working fluid to surround the armature, which can be advantageous or detrimental depending on fluid compatibility with heat generated by prolonged coil activation. Notably, EPDM seals are suited for systems using phosphate ester fluids but may degrade with petroleum-based substances. The DNDCXHE728 offers a range of coil termination and voltage options, including configurations with surge protection. The solenoid's efficient magnetic design provides high spool actuating force per watt expended, ensuring dependable valve shifting. Coils are compatible with other Sun Series 1 solenoid products and can be mounted flexibly. Additional weatherized coils enhance environmental protection. The valve incorporates Sun's floating style construction to reduce internal part binding due to installation torque or machining variations. It fits into cavity T-31A and has a capacity of up to 5 gpm (20 L/min). The rapid response time of approximately 50 ms and a switching frequency of up to 15,000 cycles/hr make it suitable for demanding applications requiring swift actuation and reliability under frequent cycling conditions.