SUN HYDRAULICS
DMDAXBN71299

***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 DMDAXBN71299 (DMDAXBN71299) is a solenoid-operated 3-way, 2-position cartridge valve that functions as a direct-acting, balanced spool directional valve. This model is specifically designed to handle a maximum operating pressure of 5000 psi (350 bar) and is fatigue rated for the same, making it suitable for high-pressure applications. It features a closed transition between spool positions B and R, optimizing performance by providing faster and more consistent response times at the cost of lowered capacity. This makes it ideal for use as pilot controls where capacity isn't a critical factor. The valve operates without requiring a minimum hydraulic pressure, enhancing its versatility in various hydraulic systems. The manual override option equipped with control types D or L includes a detent mechanism designed primarily for temporary actuation, supporting approximately 7,000 cycles mechanically. For environments using phosphate ester fluids, cartridges with EPDM seals are recommended; however, these seals must avoid exposure to petroleum-based substances to prevent damage. Additionally, the DMDAXBN71299 employs a wet armature design where the working fluid surrounds the armature. This design consideration is crucial when the coil remains energized over extended periods as it can lead to fluid degradation at high temperatures. The valve also supports interchangeable coils with other Sun Series 1 solenoid products and incorporates Sun's floating style construction to minimize internal parts binding due to installation torque or machining variations. The model has specific features like a flow capacity of 12 gpm (45 L/min), typical response time of 50 ms, and allows for switching frequencies up to 15,000 cycles per hour. Installation requires specific torque settings (30-35 lbf ft/41-47 Nm), and it has been designed with dimensions including a solenoid tube diameter of .75 inches (19 mm) and manual override stroke of .10 inches (2.5 mm). This robust construction and thoughtful engineering make the DMDAXBN71299 an efficient solution for directing flow in hydraulic systems under varying operational demands.