SUN HYDRAULICS
RELIEF CART
RPGSLWV

***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 RPGSLWV (RPGSLWV) is a high-performance pilot-operated, balanced-poppet relief cartridge valve designed for precise pressure regulation. This normally closed valve begins to open at the inlet port when the pressure reaches the predefined setting, allowing flow to tank port 2 to maintain regulated pressure effectively. Its construction ensures accurate, smooth, quiet, and fast operation with minimal pressure rise against flow. The internal modulating mechanism minimizes cavitation-related issues such as noise and manifold erosion. The valve can handle maximum pressure at port 2, making it suitable for cross-port relief circuits and load-holding applications. It remains relatively unaffected by variations in oil temperature and contamination due to its robust design. The main stage orifice is safeguarded by a 150-micron stainless steel screen, enhancing durability and reliability. Back pressure on tank port 2 is directly additive to the valve setting at a 1:1 ratio, which needs consideration during system integration. For systems utilizing phosphate ester fluids, cartridges with EPDM seals are available; however, exposure to petroleum-based substances should be avoided as it can damage these seals. Additionally, corrosion-resistant variants are available with external stainless steel components or zinc-nickel plating. The RPGSLWV incorporates Sun's floating style construction technique to prevent internal part binding due to excessive installation torque or machining variations in cavity/cartridge interfaces. With a capacity of 50 gpm (200 L/min), it operates at a maximum pressure of 5000 psi (350 bar) with typical response times of around 7 milliseconds. Installation requires specific torque values for secure assembly and includes an adjustment mechanism that allows fine-tuning throughout its range using W or Y controls unless specified otherwise for special settings. The valve's compact design features dimensions suitable for various hydraulic applications where precise pressure control is critical.