SUN HYDRAULICS
RPEEKHV

***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 RPEEKHV (Material Number: RPEEKHV) is a fast-acting, pilot-operated, balanced piston relief cartridge. This valve is designed to protect hydraulic components from pressure transients by being normally closed and pressure-limiting. It operates by opening quickly to the tank port when the inlet pressure reaches the valve setting, thereby throttling flow to control pressure rise. The valve's design includes a main stage orifice protected by a 150-micron stainless steel screen and is suitable for use in cross port relief circuits, although spool leakage should be considered in such applications. However, it is not recommended for load holding applications due to this leakage characteristic. The RPEEKHV can handle maximum operating pressures up to 5000 psi (350 bar) and has a capacity of 25 gpm (95 L/min). It features a back pressure on the tank port that directly adds to the valve setting at a 1:1 ratio. This model incorporates Sun's floating style construction, which minimizes internal parts binding due to excessive installation torque or machining variations. The valve is adjustable throughout its full range using W or Y controls unless a special setting is specified. Additional specifications include a typical response time of 2 ms, maximum valve leakage at 110 SUS (24 cSt) of 2 in\u00b3/min at 1000 psi (30 cc/min at 70 bar), and an adjustment requiring up to five clockwise turns to increase settings. The valve hex size measures .78 inches (22.2 mm), with an installation torque between 30 - 35 lbf ft (41 - 47 Nm). The adjustment screw internal hex size is .532 inches (4 mm), while the locknut hex size measures .916 inches (15 mm), requiring a torque of 80 - 90 lbf in (9 - 10 Nm). This model weighs approximately .30 lb (.15 kg) and comes with an optional Viton seal kit for enhanced durability and performance in various hydraulic systems.