SUN HYDRAULICS
RVIALHV

***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 RVIALHV (Material Number: RVIALHV) is a ventable, pilot-operated, balanced piston relief cartridge designed for precise pressure regulation in hydraulic systems. This valve remains normally closed until the inlet pressure reaches the preset threshold, at which point it opens to the tank port, throttling flow to maintain the desired pressure level. It features a vent port that facilitates remote control through additional pilot or two-way valves. Known for their accuracy and low-pressure rise relative to flow, these valves operate smoothly and quietly with moderate speed. The RVIALHV is suitable for cross port relief circuits due to its ability to handle maximum pressure at port 2; however, users should account for spool leakage in such applications. The main stage orifice is safeguarded by a 150-micron stainless steel screen, ensuring reliability and longevity. It is important to note that this valve is not recommended for load-holding applications because of potential spool leakage. When utilizing cartridges with EPDM seals, they are compatible with systems using phosphate ester fluids but should not be exposed to petroleum-based substances as this could damage the seals. This cartridge incorporates Sun's floating style construction, reducing the risk of internal component binding from excessive installation torque or machining variations in cavity/cartridge configurations. It operates within a cavity T-19A series and has a capacity of 120 gpm (480 L/min), with factory pressure settings established at 4 gpm (15 L/min). The maximum operating pressure is rated at 5000 psi (350 bar), with control pilot flow ranging from 15 to 20 in\u00b3/min (0.25 to 0.33 L/min). The valve exhibits typical response times around 10 ms and maximum leakage under specified conditions of approximately 5 in\u00b3/min (80 cc/min).