SUN HYDRAULICS
RPKELBV

***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 RPKELBV (RPKELBV) 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 to the tank port when the inlet pressure reaches the set threshold, throttling flow to keep pressure rise in check. Known for its rapid response, this valve features low pressure rise versus flow characteristics and is physically and functionally interchangeable with other 2-port relief cartridges of the same frame size. It is suitable for cross-port relief circuits but not recommended for load-holding applications due to spool leakage. The main stage orifice is shielded by a 150-micron stainless steel screen, and back pressure on the tank port directly adds to the valve setting at a 1:1 ratio. The Sun floating style construction minimizes internal part binding risks due to installation torque or machining variations. Key specifications include a Cavity T-18A Series 4 design with a capacity of 200 gpm (760 L/min), a maximum operating pressure of 5000 psi (350 bar), and typical response time of 2 ms. Maximum valve leakage at 110 SUS (24 cSt) is rated at 5 in\u00b3/min (80 cc/min) at 1000 psi (70 bar). Adjustment involves up to five clockwise turns to increase settings, with specific hex sizes for valve and locknut adjustments. The model weighs approximately 2.50 lb (1.15 kg) and includes a Viton seal kit option under cartridge number 990018006.