SUN HYDRAULICS
DMDAMPN728

***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 DMDAMPN728 (DMDAMPN728) is a solenoid-operated 3-way, 2-position cartridge valve that functions as a direct-acting, balanced spool directional valve. Its design incorporates a fatigue-rated solenoid tube assembly for up to 5000 psi or 350 bar service, ensuring durability and reliability under high-pressure conditions. The valve features closed transitions between Spools B and R, enhancing performance by providing faster and more consistent response times, particularly beneficial in pilot control applications where capacity is less critical. This model is directly actuated and operates independently of hydraulic pressure. It includes manual override options with the D or L control featuring a detent mechanism designed for temporary actuation, supporting a mechanical life expectancy of around 7,000 cycles. The valve's wet armature design means the working fluid surrounds the armature; this setup requires consideration regarding fluid type as it affects heat management during prolonged coil energization. Configurations with EPDM seals are specified for systems using phosphate ester fluids, as exposure to petroleum-based substances can damage these seals. The interchangeable coils with other Sun Series 1 solenoid products offer flexibility in mounting orientations. Additionally, the valve incorporates Sun's floating style construction which minimizes internal parts binding due to installation variances or cavity/cartridge machining discrepancies. Key specifications include a maximum flow capacity of 12 gpm (45 L/min), typical response times of around 50 ms, and switching frequencies up to 15,000 cycles per hour. The compact design measures just .60 lb (0.30 kg) in weight with manual override requirements detailed at 5 lbs force at 1000 psi for port operation. This model adheres to stringent performance standards suitable for various hydraulic applications demanding high reliability and precise control.