SUN HYDRAULICS
RPESYAV

***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 RPESYAV (Material Number: RPESYAV) is a pilot-operated, balanced poppet relief cartridge valve designed for precise pressure regulation in hydraulic systems. This normally closed valve opens to tank port 2 when the inlet port 1 pressure reaches the set threshold, effectively throttling flow to maintain desired pressure levels. Known for its accuracy, smooth operation, quiet performance, and fast response time of approximately 7 milliseconds, this valve exhibits minimal pressure rise versus flow. It is engineered to withstand maximum pressure at port 2 and is suitable for cross-port relief circuits and load-holding applications. The valve's design ensures it remains relatively insensitive to oil temperature variations and contamination, aided by a 150-micron stainless steel screen protecting the main stage orifice. The RPESYAV can handle a maximum operating pressure of up to 5000 psi (350 bar) and offers a capacity of 25 gpm (95 L/min). Its floating style construction minimizes internal binding risks due to installation torque or machining variations. Notably, backpressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. The adjustment feature allows for full-range setting customization using W or Y controls unless specified otherwise. Additional specifications include a maximum valve leakage rate of 10 drops/min at 110 SUS (24 cSt), with an adjustment range requiring approximately five clockwise turns to increase the setting. The valve hex size is 7/8 inch (22.2 mm), with installation torque ranging between 30-35 lbf-ft (41-47 Nm). The internal hex size for adjustment screws is 5/32 inch (4 mm), while the locknut hex size measures at 9/16 inch (15 mm) with torque requirements between 80-90 lbf-in (9-10 Nm). This valve weighs approximately .30 lb (.15 kg) and uses Viton seal kits for optimal performance.