SUN HYDRAULICS
RVIALCV

***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 RVIALCV (RVIALCV) is a ventable, pilot-operated, balanced piston relief cartridge designed for precise pressure regulation in hydraulic systems. This valve remains normally closed until the pressure at inlet port 1 reaches the predetermined setting, at which point it begins to open towards tank port 2 to throttle flow and maintain desired pressure levels. It features a vent port (port 3) that allows for remote control via other pilot or 2-way valves, enhancing its versatility in various applications. The RVIALCV is known for its accuracy, low pressure rise versus flow characteristics, smooth operation, quiet performance, and moderate speed. This valve can handle maximum pressures at port 2 and is suitable for use in cross-port relief circuits; however, spool leakage should be considered in such applications. The main stage orifice is safeguarded by a robust 150-micron stainless steel screen. It is important to note that the relief valve setting must always exceed the pilot valve setting. Due to potential spool leakage, this cartridge is not recommended for load-holding applications. For systems utilizing phosphate ester fluids, cartridges equipped with EPDM seals are available; caution is advised as exposure to petroleum-based fluids can damage these seals. The design incorporates Sun's floating style construction to mitigate internal component binding due to excessive installation torque or machining variations. Key specifications include a maximum operating pressure of 5000 psi (350 bar), a control pilot flow of 15-20 in\u00b3/min (0.25-0.33 L/min), and a typical response time of 10 ms. The valve has a capacity of up to 120 gpm (480 L/min) and requires an installation torque of 350-375 lbf\u00b7ft (474-508 Nm). The model weighs approximately 3.10 lb (1.40 kg) and uses Viton seal kits with part number 990019006 for maintenance purposes.