SUN HYDRAULICS
RPISYBV

***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 RPISYBV (Material Number: RPISYBV) is a pilot-operated, balanced-poppet relief cartridge valve designed for efficient pressure regulation. This valve is normally closed and begins to open to the tank port when the inlet pressure reaches the set point, throttling flow to maintain consistent pressure levels. Its design ensures accuracy, smooth operation, low noise, and quick response with minimal pressure rise versus flow. The internal modulation makes it resistant to cavitation-related issues such as noise and manifold erosion. It can handle maximum pressures at port 2 and is suitable for cross-port relief circuits and load-holding applications. The valve's performance remains stable despite variations in oil temperature or contamination, thanks to its stainless steel screen protecting the main stage orifice. The RPISYBV features a corrosion-resistant construction with options for external stainless steel or zinc-nickel plating identified by model code suffixes AP or LH. It uses Sun's floating style construction to reduce binding risks from installation torque or machining variations. The cavity T-16A Series 3 allows a capacity of up to 100 gpm (380 L/min) with factory pressure settings established at 4 gpm (15 L/min). The maximum operating pressure is 5000 psi (350 bar), with typical response times around 7 ms. The valve has a maximum leakage of 10 drops/min at reseat conditions. Installation requires a torque of 150-160 lbf ft (203-217 Nm), with adjustment facilitated by an internal hex screw and locknut requiring specific torques for secure setting adjustments. This product is ideal where reliable pressure regulation is critical under varying environmental conditions without compromising on performance efficiency.