SUN HYDRAULICS
DNDCXWN628

***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 DNDCXWN628 (Material Number: DNDCXWN628) is a direct acting, solenoid-operated, 4-way, 3-position spool valve designed for precision hydraulic control. This valve features a spring-centered mechanism that returns it to a neutral position when not energized. Upon energizing coil A, it directs fluid flow from port 3 P to port 2 A and from port 4 B to port 1 T. Conversely, energizing coil B redirects flow from port 3 to port 4 and from port 2 to port 1. The solenoid tube assembly is robustly engineered for fatigue resistance up to a service pressure of 5000 psi (350 bar), ensuring reliable performance in demanding applications. This valve requires no minimum hydraulic pressure for operation, making it versatile in different circuit configurations, especially in differential flow circuits where higher return flows should be managed through specific ports. It incorporates EPDM seals compatible with phosphate ester fluids but cautions against exposure to petroleum-based substances which could damage the seals. The wet armature design enhances thermal management by allowing the working fluid to absorb heat generated by the coil; however, users should note potential fluid degradation over extended periods of coil activation. The high-efficiency solenoid design delivers substantial spool actuation force per watt consumed, contributing to dependable valve operation. The DNDCXWN628 offers extensive customization options with various coil terminations and voltage configurations available, some with surge protection capabilities. Coils are interchangeable within Sun's Series 1 range and can be installed in either orientation on the tube. For environmental resilience, IP69K-rated connectors and weatherized coils are offered. Constructed using Sun's floating style technique, this valve minimizes internal binding risks due to installation torque or machining variances. It supports a flow capacity of up to 5 gpm (20 L/min) with minimal leakage under specified conditions and can handle switching frequencies up to 15,000 cycles per hour.