SUN HYDRAULICS
RPITCCV

***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 RPITCCV (RPITCCV) is a pilot-operated, anti-shock relief cartridge designed to limit both maximum system pressure and the rate of pressure rise. It features a valve mechanism that opens and ramps closed at a constant speed, independent of settings and flows. The adjust screw on this model determines both the maximum relief setting and the minimum threshold setting. All two-port relief cartridges, except pilot reliefs, are interchangeable in terms of flow path and cavity for a given frame size. This valve can accept maximum pressure at port 2, making it suitable for cross-port relief circuits but not for load-holding applications. When inlet port 1's pressure exceeds the threshold setting, the valve opens to tank port 2, with the pilot section moving forward at a steady rate to increase the setting by compressing the pilot spring until it reaches a mechanical stop. The RPITCCV provides protection for pumps and motors from pressure transients due to sudden load changes, particularly beneficial for variable displacement pumps where displacement mechanisms may be too slow to respond. It also reduces jerks caused by sudden reversals in hydrostatic drives and is suitable for cross-port applications. Additionally, when used with a switching device, it can provide ramp characteristics typically achieved by proportional valves. The valve's design incorporates Sun's floating style construction to minimize internal part binding due to excessive installation torque or machining variations. Key specifications include a capacity of 100 gpm (380 L/min), maximum operating pressure of 5000 psi (350 bar), control pilot flow range between 10-25 in\u00b3/min (0.16-0.41 L/min), typical response time of 2 ms, and a pressure ramp-up time between 300-500 ms. The adjustment screw allows for an increase in setting with 4.5 clockwise turns, and backpressure on tank port 2 adds directly to the valve setting at a 1:1 ratio.