SUN HYDRAULICS
SDFTLCV

***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 SDFTLCV (SDFTLCV) is a pilot-operated, anti-shock sequence cartridge designed to limit maximum system pressure and control the rate of pressure rise. This valve opens and then ramps closed at a constant speed, unaffected by settings and flows. The adjustment screw allows for setting the maximum relief and minimum threshold pressures, while the external drain ensures insensitivity to pressure at port 2. Internal modulation makes it immune to cavitation-related issues such as noise and manifold erosion. The valve's pilot flow increases with rising pressure at port 1 relative to port 3, but it is not suitable for sequencing cylinders or load holding applications. Pressure at port 3 adds directly to the valve setting at a 1:1 ratio, with a maximum of 5000 psi (350 bar). The design accommodates maximum pressure at port 2, making it suitable for cross-port relief circuits. It remains relatively unaffected by oil temperature variations and contamination. When inlet port 1 pressure exceeds the threshold, the valve opens to tank port 2, with the pilot section moving forward steadily until reaching a mechanical stop for maximum setting. The main stage orifice is contamination-protected, and its floating style construction minimizes internal binding risks due to excessive torque or machining variations. The valve fits a T-2A cavity series with a capacity of 30 gpm (120 L/min) and operates under pressures up to 5000 psi (350 bar). Control pilot flow ranges from 10\u201325 in\u00b3/min (0.16\u20130.41 L/min), with typical response times around 2 ms and pressure ramp-up times between 200\u2013400 ms. Adjustments require approximately four-and-a-half clockwise turns, with specific torque requirements for installation and locknut adjustments provided for optimal performance.