SUN HYDRAULICS
DMDADNN728

***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 DMDADNN728 (DMDADNN728) is a high-performance solenoid-operated 3-way, 2-position cartridge valve designed for robust hydraulic control. This direct-acting, balanced spool directional valve features a fatigue rating of 5000 psi (350 bar), making it suitable for demanding applications. The valve's spools, B and R, are closed during the transition between positions to enhance performance limits while sacrificing some capacity. This feature is particularly beneficial in pilot control applications where the quick and consistent response times are critical and capacity is less of a concern. The DMDADNN728 requires no minimum hydraulic pressure to operate, which allows for versatile use in various hydraulic systems. It includes manual override options with a mechanical life expectancy of about 7,000 cycles, specifically designed for temporary actuation. The valve is equipped with EPDM seals compatible with phosphate ester fluids; however, these seals must avoid exposure to petroleum-based fluids as they can cause damage. Additionally, this model utilizes a wet armature design where the working fluid surrounds the armature. This design consideration is crucial as prolonged coil energization can heat the fluid and potentially lead to breakdowns or varnish formation in certain fluid types like water-glycol mixtures. Interchangeability of coils with other Sun Series 1 solenoid products adds to the flexibility of this model, allowing coils to be mounted in either direction on the tube. The construction incorporates Sun's floating style to minimize internal parts binding due to excessive installation torque or variations in cavity/cartridge machining. With a maximum flow capacity of 12 gpm (45 L/min) and swift response times typically around 50 ms, along with a robust switching frequency up to 15,000 cycles/hr, the DMDADNN728 offers reliable performance for sophisticated hydraulic systems requiring precise control and rapid actuation.