SUN HYDRAULICS
RVGAMHV

***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 RVGAMHV (RVGAMHV) is a ventable, pilot-operated, balanced piston relief cartridge designed for precise pressure regulation in hydraulic systems. These normally closed valves regulate pressure by opening to the tank port when the inlet pressure reaches the valve setting, allowing flow throttling. They feature a vent port for remote control, making them suitable for applications requiring external pilot or two-way valve control. The RVGAMHV provides consistent performance with low pressure rise versus flow and operates smoothly and quietly with moderate speed. Key specifications include a maximum operating pressure of 5000 psi (350 bar) and a capacity of 60 gpm (240 L/min). The valve's main stage orifice is protected by a 150-micron stainless steel screen, ensuring durability. However, it is not recommended for load-holding applications due to potential spool leakage. The valve accepts maximum pressure at port 2 and can be used in cross-port relief circuits, although spool leakage should be considered in such configurations. Back pressure on the tank port directly affects the valve setting at a 1:1 ratio. Cartridges equipped with EPDM seals are compatible with systems using phosphate ester fluids but should avoid exposure to petroleum-based substances to prevent seal damage. This model incorporates Sun's floating style construction to reduce internal binding risks from installation torque or machining variations. Installation requires specific torque settings: 150-160 lbf ft (203-217 Nm) for the valve and 80-90 lbf in (9-10 Nm) for the locknut. The cartridge weighs approximately 1.60 lb (0.70 kg), and adjustments are made via an internal hex screw with five clockwise turns increasing the setting. A Viton seal kit is available under part number 990017006 for maintenance needs.