SUN HYDRAULICS
RPEELQV

***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 RPEELQV (RPEELQV) 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 at the expense of smoothness to throttle flow and limit pressure rise when the inlet port reaches the valve setting. It features a low-pressure rise versus flow and operates with remarkable speed. The valve can handle a maximum operating pressure of 5000 psi (350 bar) and offers a response time of approximately 2 milliseconds. It is suitable for use in cross-port relief circuits but should be used cautiously due to potential spool leakage, making it unsuitable for load-holding applications. The main stage orifice is safeguarded by a 150-micron stainless steel screen to ensure durability and reliability. The back pressure on tank port two directly adds to the valve setting at a 1:1 ratio, which must be considered during installation. This model incorporates Sun's floating style construction to minimize internal part binding due to excessive installation torque or machining variations. It features an adjustable range using W or Y controls with factory pressure settings established at 4 gpm (15 L/min) and can handle up to 25 gpm (95 L/min). The valve requires specific installation torques for optimal performance, with a hex size of 7/8 inch (22.2 mm) and an adjustment screw internal hex size of 5/32 inch (4 mm). The locknut torque ranges between 80-90 lbf-in (9-10 Nm), ensuring secure adjustments during operation. With its robust design and precision engineering, this relief cartridge is ideal for applications requiring fast response times and reliable pressure control in hydraulic systems.