SUN HYDRAULICS
DMDALBN228

***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 DMDALBN228 (DMDALBN228) is a solenoid-operated, 3-way, 2-position cartridge valve that offers precise and reliable control for hydraulic systems. This direct-acting, balanced spool directional valve is designed with a fatigue rating for 5000 psi (350 bar) service, making it suitable for high-pressure applications. The unique construction features spools B and R which are closed during the transition between positions to enhance performance limits at the cost of lower capacity. This configuration is particularly beneficial in pilot control applications where speed and consistency in response times are critical, rather than flow capacity. The valve operates without needing a minimum hydraulic pressure, facilitating its use in a variety of conditions with different fluid dynamics. It incorporates manual override options with D or L controls; however, these are intended for temporary actuation with a mechanical life expectancy of about 7,000 cycles. For environments using phosphate ester fluids, cartridges equipped with EPDM seals are recommended to prevent damage from petroleum-based substances. A notable feature of the DMDALBN228 is its wet armature design where the working fluid surrounds the armature. This design can influence fluid properties if the coil remains energized over extended periods due to heat exposure. The valve supports interchangeable coils from other Sun Series 1 solenoid products and can be mounted in either direction to accommodate different system configurations. Additional technical specifications include a maximum flow capacity of 12 gpm (45 L/min), typical response time of 50 ms, and maximum leakage at 3000 psi not exceeding 5 in\u00b3/min. The floating style construction minimizes internal part binding caused by installation torque or machining variations in cavity-cartridge setups. This model also features manual override capabilities requiring minimal force and provides efficient switching frequencies up to 15,000 cycles per hour.