SUN HYDRAULICS
RPKSLCN

***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 RPKSLCN (RPKSLCN) is a pilot-operated, balanced poppet relief cartridge designed to function as a normally closed pressure regulating valve. It operates by opening to the tank port when the inlet port pressure reaches the valve setting, effectively throttling flow to regulate pressure. This valve is recognized for its accuracy, smooth operation, quiet performance, and rapid response with minimal pressure rise versus flow. The internal modulation within the cartridge makes it resistant to cavitation-related issues such as noise and manifold erosion. It can handle maximum pressure at port 2 and is suitable for cross-port relief circuits. Furthermore, it remains relatively unaffected by changes in oil temperature and contamination levels. The main stage orifice of the RPKSLCN is protected by a 150-micron stainless steel screen, ensuring durability and reliability. Backpressure on the tank port directly adds to the valve setting at a 1:1 ratio. The valve features adjustable settings using W or Y controls, with options for special settings that represent maximum adjustments. Corrosion-resistant variants are available with external stainless steel or zinc-nickel plated components. The RPKSLCN incorporates Sun's floating style construction to minimize internal part binding due to installation torque or machining variations in cavity/cartridge assemblies. It fits into Cavity T-18A Series 4 with a capacity of up to 200 gpm (760 L/min) and operates under a maximum pressure of 5000 psi (350 bar). The response time is typically around 7 ms with maximum leakage at reseat limited to 10 drops/min (0.7 cc/min). Installation requires specific torque values for both the valve and locknut, ensuring secure placement in hydraulic systems where precise pressure regulation is essential.