SUN HYDRAULICS
RVGALDV

***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 RVGALDV (RVGALDV) is a ventable, pilot-operated, balanced piston relief cartridge valve. It is designed as a normally closed pressure regulating valve that opens to tank port 2 when the pressure at inlet port 1 reaches the set threshold. This mechanism allows for throttling flow to regulate pressure efficiently. The valve includes a vent port 3 for remote control by other pilot or 2-way valves, providing precise control with low pressure rise versus flow, and ensuring smooth and quiet operation with moderate speed. Notably, the valve can accept maximum pressure at port 2, making it suitable for cross-port relief circuits; however, it is important to consider spool leakage in such applications. The main stage orifice features a protective 150-micron stainless steel screen and is not recommended for load holding applications due to potential spool leakage. The cartridge's design incorporates Sun's floating style construction to prevent internal binding from excessive installation torque or cavity machining variations. It is capable of handling up to 60 gpm (240 L/min) with a maximum operating pressure of 5000 psi (350 bar). The control pilot flow ranges between 15-20 in\u00b3/min (0.25-0.33 L/min), with a typical response time of around 10 ms. Additionally, backpressure on tank port 2 directly influences the valve setting at a 1:1 ratio. Cartridges equipped with EPDM seals are intended for systems using phosphate ester fluids as exposure to petroleum-based substances may damage the seals. The RVGALDV model weighs approximately 1.60 lb (0.70 kg), and its installation requires specific torque settings: valve installation torque should be between 150-160 lbf\u00b7ft (203-217 Nm), while the locknut torque should be maintained at 80-90 lbf\u00b7in (9-10 Nm).