SUN HYDRAULICS
RPISKAN

***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 RPISKAN (RPISKAN) is a pilot-operated, balanced poppet relief cartridge designed to regulate pressure efficiently and quietly. This valve remains normally closed until the pressure at the inlet port reaches the preset level, at which point it opens to the tank port, throttling flow to maintain consistent pressure. Known for its accuracy and fast response time of approximately 7 milliseconds, this cartridge is suitable for applications requiring stable pressure regulation with low noise and minimal pressure rise against flow. It can handle maximum operating pressures up to 5000 psi (350 bar) and is equipped with a main stage orifice protected by a 150-micron stainless steel screen, making it resistant to oil contamination and temperature variations. The RPISKAN is ideal for use in cross-port relief circuits since it can accept maximum pressure at port 2. It also performs well in load-holding applications due to its insensitivity to back pressure on the tank port, which directly affects the valve setting at a 1:1 ratio. The valve's corrosion-resistant construction options make it suitable for harsh environments; these are identified by model code suffixes AP or LH for external stainless steel or zinc-nickel plated components, respectively. Installation requires a torque of 150-160 lbf ft (203-217 Nm), with adjustments made via an internal hex screw that increases settings over five full turns clockwise. The cartridge's design minimizes internal part binding due to excessive installation torque or machining variations, ensuring reliable operation over time. With a capacity of up to 100 gpm (380 L/min) and minimal leakage at reseat conditions, this valve provides robust performance in various hydraulic systems.