SUN HYDRAULICS
SDHTLAV

***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 SDHTLAV (SDHTLAV) is a pilot-operated, anti-shock relief cartridge designed to limit maximum system pressure and control the rate of pressure rise. This valve is engineered to open and ramp closed at a constant speed, regardless of settings and flows, with an adjust screw that determines both maximum relief and minimum threshold settings. Featuring an external drain, it remains unaffected by pressure at port 2. The internal modulation makes it resistant to cavitation-related issues such as noise and manifold erosion. Suitable for cross-port relief circuits, the valve can handle maximum pressure at port 2 but is not appropriate for sequencing cylinders or load-holding applications. The SDHTLAV operates with pilot flow increasing as the pressure at port 1 inlet rises above the valve setting relative to port 3 drain. Pressure settings are unaffected by back pressure at port 2, and any pressure at port 3 adds directly to the valve setting in a 1:1 ratio, not exceeding 5000 psi (350 bar). It remains stable against varying oil temperatures and contamination. When inlet port 1 pressure surpasses the threshold setting, the valve opens to tank port 2; the pilot section advances steadily, compressing the spring until reaching a mechanical stop for maximum setting. With a capacity of 60 gpm (240 L/min), it operates up to a maximum of 5000 psi (350 bar) with typical response times around 2 ms. The main stage orifice is shielded from contamination, employing Sun's floating style construction to prevent internal part binding due to installation torque or cavity machining variations. The SDHTLAV features adjustable settings with five clockwise turns for increased pressure settings and requires specific torque values for installation and adjustment components.