SUN HYDRAULICS
RPISKBN

***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 RPISKBN (Material Number: RPISKBN) is a pilot-operated, balanced poppet relief cartridge designed to function as a normally closed pressure regulating valve. This versatile component opens to tank port 2 when the inlet port 1 reaches the designated pressure setting, effectively throttling flow to maintain consistent pressure levels. Known for its accuracy, smooth operation, quiet performance, and rapid response time of approximately 7 milliseconds, this valve boasts a low pressure rise versus flow characteristic. The internal modulation within the cartridge minimizes issues associated with cavitation such as noise and manifold erosion. It can handle maximum pressure at port 2, making it suitable for cross-port relief circuits and load-holding applications. The valve's performance remains stable despite variations in oil temperature or contamination levels due to its robust design. A 150-micron stainless steel screen protects the main stage orifice from debris. Additionally, back pressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. The RPISKBN model incorporates Sun's floating style construction to reduce internal part binding risks during installation or due to machining variations in cavity/cartridge design. It features adjustable controls with options for special settings if needed; otherwise, it can be adjusted throughout its full range using W or Y controls. Its corrosion-resistant construction is ideal for harsh environments with external components available in stainless steel or zinc-nickel plating options. The valve fits into Cavity T-16A Series 3 and has a maximum capacity of 100 gpm (380 L/min) with an operating pressure limit of up to 5000 psi (350 bar). Installation requires specific torques for optimal performance and longevity, detailed in its specifications.