SUN HYDRAULICS
DNCALSN728

***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 DNCALSN728 (DNCALSN728) is a solenoid-operated, 4-way, 2-position cartridge valve designed for direct-acting, balanced spool directional control. This valve features a closed transition between positions, significantly reducing oil loss during shifting\u2014a critical advantage in pilot control circuits. Optimized for systems with port 3 as the inlet and port 1 as the tank, this valve allows reverse flow but does not guarantee the same performance. The solenoid tube assembly is rated for fatigue service up to 5000 psi (350 bar), ensuring durability under high-pressure conditions. It operates without requiring a minimum hydraulic pressure and is compatible with phosphate ester fluids when equipped with EPDM seals, which are vulnerable to petroleum-based substances. The wet armature design immerses the armature in working fluid, which can be affected by prolonged coil energization due to heat exposure\u2014particularly impacting water-glycol mixtures. The solenoid's magnetic design enhances efficiency, providing high spool actuating force per watt expended and reliable valve shifting. Coils are interchangeable within Sun Series 1 solenoid products and can be mounted bidirectionally on the tube. Various coil termination and voltage options are available, including those with surge protection and IP69K-rated connectors for enhanced environmental protection. The DNCALSN728 incorporates Sun's floating style construction to prevent internal component binding from excessive installation torque or cavity machining variations. Its capacity reaches up to 8 gpm (30 L/min), with a maximum operating pressure of 5000 psi (350 bar). The typical response time is approximately 50 ms, supporting a switching frequency of up to 15,000 cycles per hour. With a manual override stroke of .10 inches (2.5 mm) and requiring an override force of 5 lbs/1000 psi at Port 1 (33 N/100 bar), this model ensures robust manual operation capabilities.