SUN HYDRAULICS
RPEEKQN

***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 RPEEKQN (Material Number: RPEEKQN) is a fast-acting, pilot-operated, balanced piston relief cartridge designed to protect hydraulic components from pressure transients. These normally closed, pressure-limiting valves open rapidly to tank port 2 when the inlet port 1 pressure reaches the valve setting, effectively throttling flow to limit pressure rise. The valve's design ensures low pressure rise versus flow and enables quick response times, typically around 2 milliseconds. It is suitable for use in cross port relief circuits, accepting maximum pressure at port 2; however, users should consider spool leakage in these applications. The main stage orifice is safeguarded by a 150-micron stainless steel screen. Notably, this model is not recommended for load-holding applications due to potential spool leakage. The RPEEKQN incorporates Sun's floating style construction to reduce the risk of internal parts binding from excessive installation torque or machining variations. The valve's cavity is T-10A Series 1 with a capacity of up to 25 gpm (95 L/min) and can withstand a maximum operating pressure of 5000 psi (350 bar). It features an adjustable setting range via W or Y controls and offers interchangeable functionality with other two-port relief cartridges of equivalent frame size. The adjustment screw has an internal hex size of 5/32 inches (4 mm), while the locknut hex size is 9/16 inches (15 mm), with respective torque specifications provided for secure installation. This model weighs approximately .30 lb (.15 kg) and utilizes Viton seals with seal kit number 990010006 available for maintenance purposes.