SUN HYDRAULICS
HDDADCV912

***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 HDDADCV912 (HDDADCV912) is a solenoid-after check cartridge hybrid valve designed for lift-lower applications, integrating directly into actuators. It combines a direct-acting solenoid poppet valve with a check function, enabling flow from inlet port 2 to system port 1 while blocking flow from port 2 to port 3 when the solenoid is de-energized. The valve is suitable for load-holding applications and features a fatigue-rated solenoid tube assembly for up to 5000 psi (350 bar) service. It offers several manual override options, including temporary actuation detent mechanisms on D or L control models, with a mechanical life expectancy of approximately 7,000 cycles. Note that manual override functionality is incompatible with weatherized coils. The HDDADCV912 utilizes a wet armature design where the working fluid surrounds the armature, potentially affecting function if fluids like water-glycol mixtures degrade under prolonged coil energization. Coils are interchangeable with other Sun Series 1 solenoids and can be mounted in either direction, with various coil connector options rated up to IP69K for enhanced environmental protection. The valve incorporates Sun's floating style construction to minimize internal part binding due to excessive installation torque or machining variations. Key specifications include a T11A cavity, Series 1 designation, and a capacity of 10 gpm (40 L/min). The maximum operating pressure is rated at 5000 psi (350 bar), with typical response times around 50 ms and maximum leakage at specified conditions of 10 drops/min (0.7 cc/min). Additional technical details include a check cracking pressure of 30 psi (2 bar), switching frequency of up to 15,000 cycles/hr, and specific manual override force requirements and stroke dimensions. The valve's seal kit features Viton materials for durability in demanding environments.