SUN HYDRAULICS
DMDAXRV228

***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 DMDAXRV228 (DMDAXRV228) is a solenoid-operated 3-way, 2-position cartridge valve that features a direct-acting, balanced spool design for precise control in hydraulic systems. This model is particularly noted for its robust construction, including a solenoid tube assembly that is fatigue rated for 5000 psi (350 bar) service, ensuring reliable operation under high-pressure conditions. The valve offers closed transitions between Spools B and R, which enhances performance by providing faster and more consistent response times, especially suitable for applications requiring pilot controls. The DMDAXRV228 operates without the need for minimum hydraulic pressure, facilitating its use in various fluid power applications. It includes options such as manual overrides with detent mechanisms (models with D or L control), designed primarily for temporary actuation with a mechanical life expectancy of approximately 7,000 cycles. Additionally, the valve can be equipped with EPDM seals intended for systems using phosphate ester fluids; however, these seals must not be exposed to petroleum-based fluids as they can degrade. This model also employs a wet armature design where the working fluid surrounds the armature. This design consideration is vital when the coil is energized for extended periods since some fluids can break down and affect cartridge functionality. The interchangeable coils compatible with other Sun Series 1 solenoid products offer flexibility in maintenance and replacement processes. Key specifications include a maximum operating pressure of 5000 psi (350 bar), flow capacity up to 12 gpm (45 L/min), and typical response times around 50 ms. The valve also features Sun's floating style construction which minimizes internal parts binding\u2014a common issue in environments with excessive installation torque or variations in cavity/cartridge machining.