SUN HYDRAULICS
DMDAMNN748

***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 DMDAMNN748 (DMDAMNN748) is a high-performance, solenoid-operated 3-way, 2-position cartridge valve designed for precise hydraulic fluid direction management. This direct-acting, balanced spool directional valve is engineered to operate without minimum hydraulic pressure, enhancing its versatility in various applications. It features a fatigue rating for 5000 psi (350 bar) service, ensuring durability and reliability under high-pressure conditions. The DMDAMNN748 valve incorporates a closed transition between spools B and R during switching, which optimizes performance by providing faster and more consistent response times at the expense of lower flow capacity. This characteristic makes it ideal for pilot control applications where capacity is less critical. The manual override feature included in models with the D or L control uses a detent mechanism designed for temporary actuation, with an estimated mechanical life of approximately 7,000 cycles. For compatibility with different fluid types, cartridges configured with EPDM seals are specifically made for systems using phosphate ester fluids; however, they must not be exposed to petroleum-based fluids as this can damage the seals. The valve's wet armature design allows the working fluid to surround the armature which helps manage heat during prolonged coil energization but requires careful consideration of fluid type due to potential breakdown and varnish formation. Additional features include interchangeable coils with other Sun Series 1 solenoid products and a floating style construction that minimizes internal part binding caused by excessive installation torque or cavity/cartridge machining variations. The valve supports up to 12 gpm (45 L/min) capacity and offers rapid response times typically around 50 ms. It also maintains low leakage rates and can handle switching frequencies up to 15,000 cycles per hour. This model's robust construction and thoughtful design make it an effective solution for advanced hydraulic system configurations requiring reliable directional control.