SUN HYDRAULICS
RPIEQAV

***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 RPIEQAV (RPIEQAV) is a fast-acting, pilot-operated, balanced piston relief cartridge designed to protect hydraulic components from pressure transients. This normally closed, pressure-limiting valve opens rapidly when the inlet port pressure reaches the valve setting, directing flow to the tank port to limit pressure rise. The design prioritizes speed over smoothness in operation, making it highly responsive with a typical response time of 2 ms. It features a low-pressure rise versus flow and can handle a maximum operating pressure of 5000 psi (350 bar), with a capacity of up to 100 gpm (380 L/min). The valve is interchangeable with other 2-port relief cartridges of the same frame size and can accept maximum pressure at port 2, making it suitable for cross-port relief circuits. However, users should consider spool leakage in such applications, as these valves are not ideal for load-holding due to this characteristic. The main stage orifice is protected by a 150-micron stainless steel screen, and the valve incorporates Sun's floating style construction to prevent internal binding from installation torque or machining variations. The adjustment mechanism allows for fine-tuning with five clockwise turns required to increase the setting, and back pressure on the tank port is directly additive at a 1:1 ratio. Installation requires a torque of 150 - 160 lbf ft (203 - 217 Nm), while adjustment screw and locknut sizes are specified for precise assembly. The RPIEQAV model is compact yet robust, weighing approximately 1.20 lb (0.55 kg), and utilizes Viton seals for reliable performance under various conditions.