SUN HYDRAULICS
RPKSYNV

***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 RPKSYNV (RPKSYNV) is a pilot-operated, balanced poppet relief cartridge designed for precise pressure regulation in hydraulic systems. This normally closed valve opens to the tank port when the inlet pressure reaches the set value, effectively throttling flow to maintain desired pressure levels. Known for its accuracy, smooth operation, and rapid response time of approximately 7 milliseconds, this valve exhibits low noise levels and minimal pressure rise with flow changes. The internal modulating mechanism ensures immunity to cavitation-related issues like noise and manifold erosion. It can handle maximum pressures at port 2, making it suitable for cross-port relief circuits. The valve's performance remains stable despite variations in oil temperature and contamination levels. The main stage orifice is safeguarded by a 150-micron stainless steel screen, ensuring durability and longevity. Notably, back pressure on the tank port adds directly to the valve setting at a 1:1 ratio. Users can adjust the valve throughout its full range using W or Y controls unless a specific setting is predetermined as its maximum limit. Corrosion-resistant options are available with stainless steel or zinc-nickel plated components for use in harsh environments. The RPKSYNV incorporates Sun\u2019s floating style construction to prevent internal binding due to installation torque or machining variations. With a capacity of up to 200 gpm (760 L/min) and a maximum operating pressure of 5000 psi (350 bar), it is robust enough for demanding applications. The factory settings are established at 4 gpm (15 L/min). The valve features practical dimensions with a hex size of 1-5/8 inches (41.3 mm) and an installation torque requirement of 350-375 lbf ft (474-508 Nm). Additionally, it includes an adjustment screw with an internal hex size of 5/32 inches (4 mm) and a locknut requiring torque between 80-90 lbf in (9-10 Nm).