SUN HYDRAULICS
RPGSCQN

***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 RPGSCQN (RPGSCQN) is a pilot-operated, balanced poppet relief cartridge designed as a normally closed pressure regulating valve. It operates by opening to tank port 2 when the pressure at inlet port 1 reaches the valve setting, thereby throttling flow to regulate pressure. This valve is recognized for its accuracy, smooth operation, quietness, speed, and low pressure rise versus flow. The modulation occurring inside the cartridge makes it resistant to cavitation-related issues such as noise and manifold erosion. It is capable of accepting maximum pressure at port 2 and is suitable for use in cross-port relief circuits. The valve maintains performance despite varying oil temperatures and contamination levels due to its design features like the 150-micron stainless steel screen protecting the main stage orifice. This model is ideal for load-holding applications and accommodates back pressure on tank port 2 directly additive to the valve setting at a 1:1 ratio. Cartridges with EPDM seals are compatible with systems using phosphate ester fluids but are vulnerable to damage from petroleum-based substances. Customizable settings are available with W and Y controls, allowing full-range adjustment unless a specific maximum setting is designated. Corrosion-resistant variants are available with external stainless steel or zinc-nickel plated components identified by suffixes AP or LH respectively. The RPGSCQN incorporates Sun's floating style construction to prevent internal part binding due to excessive installation torque or machining variations. It fits into cavity T-3A and offers a capacity of up to 50 gpm (200 L/min) with factory settings established at 4 gpm (15 L/min). The maximum operating pressure is rated at 5000 psi (350 bar) with typical response times around 7 ms and minimal leakage upon reseat. Installation requires specific torque values for both the valve body and adjustment components, ensuring optimal performance in demanding hydraulic applications.