SUN HYDRAULICS
RDHAQCN

***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 RDHAQCN (Material Number: RDHAQCN) is a direct-acting relief cartridge valve designed for hydraulic systems to protect components from pressure transients. This normally closed, pressure-limiting valve opens to tank port 2 when the inlet port 1 reaches the preset pressure, throttling flow to control pressure rise. Known for its smooth operation, it is virtually leak-free and dirt tolerant, making it highly reliable and fast in response. The valve's design ensures that it is physically and functionally interchangeable with other 2-port relief cartridges of the same size, allowing for versatile application in various hydraulic circuits, including cross port relief circuits. The RDHAQCN can handle maximum pressures at port 2 and is suitable for load holding applications. Adjustments can only be made when system pressure is off, following a specific procedure to ensure accuracy. It is relatively insensitive to changes in oil temperature and contamination levels. The valve features Sun's floating style construction to minimize internal binding risks due to installation torque or machining variations. Key specifications include a T-16A cavity size with a capacity of 100 gpm (380 L/min), maximum operating pressure of 5000 psi (350 bar), and typical response time of 2 ms. The valve maintains low leakage rates at reseat with an adjustment range facilitated by up to six clockwise turns. Its robust construction includes a hex size of 1-1/4 inches (31.8 mm) for installation torque between 150-160 lbf ft (203-217 Nm). The RDHAQCN weighs approximately 1.30 lb (0.60 kg) and utilizes Viton seal kits for enhanced durability under varying conditions.