SUN HYDRAULICS
RPKECCN

***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 RPKECCN (RPKECCN) 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 when the inlet port pressure reaches the valve setting, relieving excess pressure by throttling flow to the tank port. It features a low-pressure rise versus flow and provides quick response times at approximately 2 milliseconds. The valve can handle a maximum operating pressure of up to 5000 psi (350 bar) and has a capacity of 200 gpm (760 L/min). Constructed with Sun's floating style design, it minimizes internal part binding due to installation torque or machining variations. The RPKECCN is suitable for cross-port relief circuits but not for load-holding applications due to spool leakage. It incorporates a 150-micron stainless steel screen protecting the main stage orifice and allows back pressure on the tank port to be additive to the valve setting at a 1:1 ratio. The valve's physical dimensions include a hex size of 1 5/8 inches (41.3 mm) and an installation torque range of 350\u2013375 lbf ft (474\u2013508 Nm). Adjustments are made using an internal hex size of 5/32 inches (4 mm), with five clockwise turns increasing the setting. This cartridge weighs approximately 2.50 lb (1.15 kg) and utilizes Viton seals with an available seal kit under part number 990018006.