SUN HYDRAULICS
DRAYLCN

***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 DRAYLCN (DRAYLCN) is a normally open, direct-acting 2-way directional cartridge with an external drain, functioning as a pilot unloading valve. It is designed to sense pressure in one circuit to switch or unload a valve in another circuit. When the pressure at port 1 surpasses the valve's set threshold, the spool shifts to block port 2 from port 3. The pilot area at port 1 and spring chamber drain at port 4 are positively sealed, ensuring minimal leakage between work ports 2 and 3, which is less than 20 drops per minute (1.4 cc/min). This valve does not modulate and acts similarly to a hydraulic pressure switch, incorporating Sun's floating style construction to reduce internal parts binding due to excessive installation torque or machining variations. The DRAYLCN fits into cavity T-21A and belongs to Series 1 with a capacity of .5 gpm (2 L/min) and can withstand a maximum operating pressure of up to 5000 psi (350 bar). The maximum valve leakage at reseat is limited to 20 drops per minute, with reseating occurring at approximately 85% of the setting. The hex size for the valve is .78 inches (22.2 mm), requiring an installation torque between 30-35 lbf ft (41-47 Nm). The adjustment screw has an internal hex size of .156 inches (4 mm), while the locknut has a hex size of .563 inches (15 mm) with a torque specification of 80-90 lbf in (9-10 Nm). Weighing .30 lb (.15 kg), this model utilizes Viton seals for its cartridge.