SUN HYDRAULICS
DNDCXYN

***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 DNDCXYN (DNDCXYN) is a direct acting, solenoid-operated, 4-way, 3-position spool valve designed to be spring-centered to the neutral position. When coil A is activated, fluid flows from port 3 P to port 2 A and from port 4 B to port 1 T. Conversely, when coil B is energized, the flow is directed from port 3 to port 4 and from port 2 to port 1. This valve is engineered with a solenoid tube assembly that can withstand fatigue at a service pressure of up to 5000 psi (350 bar), requiring no minimum hydraulic pressure for operation. It is particularly suitable for differential flow circuits where the higher return flow should be routed through port 2 A to port 1 T. The valve features EPDM seals compatible with phosphate ester fluids but not with petroleum-based fluids, which could cause seal damage. A notable feature of this valve is its wet armature design, where the working fluid surrounds the armature and absorbs heat generated by the coil. This aspect becomes crucial if the coil remains energized for extended durations as certain fluids like water-glycol mixtures may degrade over time due to heat exposure. The DNDCXYN model offers various coil termination and voltage options, some with surge protection capabilities. Its high-efficiency solenoid design ensures reliable valve shifting by providing substantial spool actuating force per watt expended. Coils are interchangeable within Sun's Series 1 solenoid products and can be mounted bidirectionally on the tube. The valve incorporates Sun's floating style construction to reduce internal part binding risks due to excessive installation torque or cavity/cartridge machining variations. It has a capacity of handling up to 5 gpm (20 L/min) and features a typical response time of around 50 ms with minimal leakage under specified conditions. Its robust design allows for frequent switching at rates up to 15,000 cycles per hour while maintaining optimal performance in various applications.