SUN HYDRAULICS
RVCAKYN

***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 RVCAKYN (Material Number: RVCAKYN) is a ventable, pilot-operated, balanced piston relief cartridge designed for precise pressure regulation in hydraulic systems. This valve is typically closed and opens to the tank port 2 when the inlet pressure at port 1 reaches the predetermined setting, thereby controlling flow to maintain regulated pressure. It features a vent port 3 that allows for remote control via other pilot or two-way valves. Notably, the valve offers accuracy with minimal pressure rise versus flow and operates smoothly and quietly with moderate speed. This model is suitable for cross-port relief circuits as it can handle maximum pressure at port 2; however, users should consider spool leakage if used in such applications. The main stage orifice is protected by a robust 150-micron stainless steel screen. It's important to note that this valve is not appropriate for load-holding applications due to potential spool leakage. Additionally, any back pressure on tank port 2 will directly add to the valve setting at a 1:1 ratio. The RVCAKYN model incorporates Sun's floating style construction to reduce binding risks from excessive installation torque or machining variations in cavity/cartridge configurations. Cartridges with EPDM seals are specifically intended for systems using phosphate ester fluids, as exposure to petroleum-based substances could damage these seals. Key specifications include a capacity of 15 gpm (60 L/min), maximum operating pressure of 5000 psi (350 bar), and typical response time of 10 ms. The valve requires an installation torque of 30-35 lbf ft (41-47 Nm) and has an adjustment screw internal hex size of 5/32 inch (4 mm). For maintenance or replacement purposes, Viton seal kits are available under part number 990011006.