SUN HYDRAULICS
DMDAXNV528

***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 DMDAXNV528 (DMDAXNV528) is a high-performance, solenoid-operated 3-way, 2-position cartridge valve. This direct-acting, balanced spool directional valve is designed for robust applications with a fatigue rating for 5000 psi (350 bar) service. The valve features closed transitions between Spools B and R, enhancing performance limits while reducing capacity, making it ideal for pilot control applications where capacity is less critical but fast and consistent response times are essential. The DMDAXNV528 operates without requiring a minimum hydraulic pressure, ensuring reliable functionality across various conditions. For temporary actuation, models equipped with D or L control include a detent mechanism in the manual override. Additionally, the mechanical life expectancy of the manual control assembly (D, L, and T) is approximately 7,000 cycles. This valve utilizes EPDM seals specifically for systems using phosphate ester fluids; exposure to petroleum-based fluids can damage these seals. The wet armature design of the valve means that the working fluid surrounds the armature which can be exposed to heat when the coil is energized extensively. This factor needs consideration especially with fluids like water-glycol mixtures that may degrade under prolonged heat exposure. Interchangeability of coils with other Sun Series 1 solenoid products adds versatility to this model, allowing coils to be mounted in either direction on the tube. Moreover, Sun's floating style construction incorporated into this model minimizes internal parts binding which could arise from excessive installation torque or variations in cavity/cartridge machining. Key specifications include a flow capacity of 12 gpm (45 L/min), maximum operating pressure of 5000 psi (350 bar), typical response time of 50 ms, and maximum valve leakage at 110 SUS (24 cSt) being minimal at 5 in\u00b3/min at 3000 psi (80 cc/min at 210 bar). The manual override requires minimal force and has a stroke length adequate for effective operation. This compact model weighs only about 0.60 lb (0.30 kg), facilitating easy installation and handling.