SUN HYDRAULICS
RPIEKNV

***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 RPIEKNV (RPIEKNV) is a fast-acting, pilot-operated, balanced piston relief cartridge designed to protect hydraulic components from pressure transients. These normally closed valves are pressure-limiting and open quickly to tank port 2 when the inlet port 1 pressure reaches the set threshold, thereby throttling flow to control pressure rise. Despite their rapid response, these valves prioritize speed over smoothness and are not suitable for load holding applications due to spool leakage. The RPIEKNV features a low-pressure rise versus flow characteristic and can handle a maximum operating pressure of 5000 psi (350 bar). It accepts maximum pressure at port 2, making it suitable for cross-port relief circuits while considering spool leakage. The valve incorporates Sun's floating style construction to prevent internal part binding due to excessive installation torque or machining variations. It includes a main stage orifice protected by a 150-micron stainless steel screen and has a typical response time of 2 ms. The valve is adjustable with up to five clockwise turns increasing the setting, featuring an internal hex size of 5/32 inches for adjustment screws. The locknut hex size is 9/16 inches with a torque range of 80-90 lbf-in (9-10 Nm). Installation requires a torque of 150-160 lbf-ft (203-217 Nm), fitting into cavity T-16A Series 3 with a capacity of up to 100 gpm (380 L/min). This model weighs approximately 1.20 lb (0.55 kg) and uses Viton seal kits for maintenance.