SUN HYDRAULICS
SDHTCWV

***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 SDHTCWV (SDHTCWV) 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 ramps closed at a constant speed, unaffected by settings or flow variations. An adjustment screw allows users to set the maximum relief and minimum threshold settings. The external drain feature makes the valve insensitive to pressure at port 2, while modulating inside the cartridge helps prevent issues like cavitation, noise, and manifold erosion. The pilot flow increases as the inlet pressure at port 1 rises above the valve setting relative to port 3's drain pressure. While not suitable for sequencing cylinders or load-holding applications, this valve can accept maximum pressure at port 2, making it ideal for cross-port relief circuits. It is relatively insensitive to varying oil temperatures and contamination. The valve features a cavity size of T-17A with a series 3 capacity of up to 60 gpm (240 L/min) and can operate under pressures up to 5000 psi (350 bar). It offers a typical response time of 2 ms with maximum leakage of 10 drops/min (0.7 cc/min) upon reseat. The pressure ramp-up time ranges from 300 to 500 ms. Adjustments can be made with five full clockwise turns for increasing settings, using an internal hex size of 5/32 inches (4 mm). Installation requires a torque between 150-160 lbf ft (203-217 Nm), while the locknut torque is between 80-90 lbf in (9-10 Nm). Weighing approximately 1.50 lb (0.70 kg), it incorporates Sun's floating style construction to reduce binding risks due to installation torque or machining variations in cavities/cartridges.