SUN HYDRAULICS
RPKSYBV

***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 RPKSYBV (RPKSYBV) 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 inlet pressure reaches the preset level, effectively throttling flow to maintain desired pressure levels. Notable for its accuracy, smooth operation, and low noise output, the RPKSYBV is adept at minimizing issues related to cavitation such as noise and erosion. This makes it particularly suitable for cross port relief circuits where maximum pressure can be applied at port 2. The valve's performance remains stable despite variations in oil temperature and contamination, thanks to its robust design which includes a 150-micron stainless steel screen protecting the main stage orifice. The RPKSYBV can handle a maximum operating pressure of 5000 psi (350 bar) with a typical response time of 7 milliseconds. It features an adjustment range controlled by W and Y options and is capable of accepting 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 to prevent internal part binding due to installation torque or machining variations. Additionally, the RPKSYBV is available with corrosion-resistant components identified by suffixes AP or LH, suited for harsh environments. It fits into cavity T-18A with a capacity of 200 gpm (760 L/min) and has factory pressure settings established at 4 gpm (15 L/min). The valve installation requires a torque between 350 - 375 lbf ft (474 - 508 Nm), with specific hex sizes provided for adjustment screws and locknuts. The model weighs approximately 2.50 lb (1.15 kg) and uses Viton seal kits identified by part number 990318006 for maintenance needs.