SUN HYDRAULICS
SDHTLCN

***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 SDHTLCN (SDHTLCN) is a pilot-operated, anti-shock relief cartridge designed to limit maximum system pressure and control the rate of pressure rise. This valve opens and closes at a consistent speed, unaffected by settings or flow variations, thanks to its internal modulation mechanism that mitigates issues like cavitation noise and manifold erosion. Featuring an external drain, it remains insensitive to back pressure at port 2 and can handle maximum pressure in cross-port relief circuits. The valve is designed for applications where stability against oil temperature fluctuations and contamination is crucial but is not suitable for sequencing cylinders or load-holding functions. The SDHTLCN model incorporates Sun's floating style construction, reducing the risk of internal part binding due to excessive installation torque or machining discrepancies. It has a hex size of 1 1/4 inches and requires an installation torque between 150-160 lbf ft. The adjustment screw uses a 5/32 inch internal hex size, allowing up to five turns clockwise to increase the setting. This model supports a maximum operating pressure of 5000 psi (350 bar), with a capacity of 60 gpm (240 L/min). The factory establishes pressure settings at 4 gpm (15 L/min), with a typical response time of 2 ms. Additionally, the valve features a main stage orifice protected against contamination and has a maximum leakage rate at reseat of 10 drops/min (0.7 cc/min). Pressure ramp-up time ranges from 300 to 500 ms, ensuring reliable performance in various hydraulic systems. The model weighs approximately 1.50 lb (0.70 kg) and includes Viton seal kits for enhanced durability under demanding conditions.