SUN HYDRAULICS
DMDAXNN828

***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 DMDAXNN828 (DMDAXNN828) is a high-performance solenoid-operated 3-way, 2-position cartridge valve. This direct-acting, balanced spool directional valve is specially designed to operate effectively without requiring a minimum hydraulic pressure. The model features a solenoid tube assembly that is fatigue rated for 5000 psi (350 bar) service, ensuring durability and reliability under high-pressure conditions. The DMDAXNN828 valve incorporates closed transitions between spools B and R, which enhances performance by providing faster and more consistent response times, particularly when used as pilot controls where capacity is less critical. This configuration allows the valve to achieve higher performance limits at the expense of lower capacity. Additionally, the model is equipped with manual override options (D or L control), featuring a detent mechanism intended for temporary actuation with a mechanical life expectancy of around 7,000 cycles. This valve uses EPDM seals suitable for systems containing phosphate ester fluids; however, these seals are susceptible to damage when exposed to petroleum-based fluids. It also employs a wet armature design where the working fluid surrounds the armature, which can be an essential factor if the coil remains energized over extended periods. Other notable features include interchangeable coils with other Sun Series 1 solenoid products, allowing flexibility in mounting direction on the tube. The floating style construction minimizes internal parts binding due to installation torque or cavity/cartridge machining variations. With a maximum operating pressure of 5000 psi (350 bar) and a capacity of 12 gpm (45 L/min), this valve meets demanding hydraulic system requirements while maintaining efficient operation and switch frequency up to 15,000 cycles/hr.