SUN HYDRAULICS
DNCALTV212

***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 DNCALTV212 (DNCALTV212) is a solenoid-operated, 4-way, 2-position cartridge valve featuring a direct-acting, balanced spool design. This directional valve is engineered with a closed transition between positions, significantly minimizing oil loss during shifting\u2014an essential feature for pilot control circuits. The valve's capacity is optimized when port 3 serves as the inlet and port 1 as the tank; although reverse flow is feasible, it is not recommended due to potential performance inconsistencies. Designed for robust operation, the solenoid tube assembly is fatigue-rated for service up to 5000 psi (350 bar), and the valve requires no minimum hydraulic pressure for activation due to its direct actuation. Compatibility with EPDM seals makes it suitable for systems using phosphate ester fluids, but exposure to petroleum-based substances should be avoided to prevent seal damage. The DNCALTV212 incorporates a wet armature design; thus, the working fluid surrounds the armature and absorbs heat from the coil. This aspect should be considered in applications where the coil remains energized for extended periods since certain fluids like water-glycol mixtures may degrade over time at elevated temperatures. The solenoid's magnetic design ensures high efficiency by delivering substantial spool actuating force per watt expended, which enhances reliable shifting of the valve. This model features interchangeable coils compatible with other Sun Series 1 solenoid products and offers various coil termination and voltage options, including configurations with surge protection. It supports a maximum capacity of 8 gpm (30 L/min) and can handle pressures up to 5000 psi (350 bar). With a typical response time of 50 ms and switching frequency capability of up to 15,000 cycles per hour, this valve ensures rapid operation in demanding environments. The DNCALTV212 also includes manual override capabilities and utilizes Sun's floating style construction to prevent internal part binding due to installation torque or machining variations.