SUN HYDRAULICS
RELIEF CART
RVGALWN

***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 RVGALWN (RVGALWN) is a ventable, pilot-operated, balanced piston relief cartridge designed for precise pressure regulation. This normally closed valve operates by opening to tank port 2 when the inlet pressure at port 1 reaches the set value, effectively throttling flow to maintain desired pressure levels. It features a vent port at port 3, allowing for remote control using other pilot or two-way valves. Known for its accuracy and smooth operation, the RVGALWN is characterized by a low pressure rise relative to flow and moderate response speed. It is suitable for cross-port relief circuits, accepting maximum pressure at port 2; however, spool leakage should be considered in such applications. The main stage orifice is shielded by a durable 150-micron stainless steel screen. Notably, it is not recommended for load-holding applications due to potential spool leakage. The valve's back pressure on tank port 2 directly affects the valve setting in a 1:1 ratio. When equipped with EPDM seals, it is compatible with phosphate ester fluids but can be damaged by petroleum-based substances. The design incorporates Sun\u2019s floating style construction to minimize internal binding risks from installation torque or machining variations. Key specifications include a maximum operating pressure of 5000 psi (350 bar), a capacity of up to 60 gpm (240 L/min), and typical response time of about 10 ms. Adjustment requires approximately five clockwise turns to increase the setting, with specific torque settings for installation and locknut adjustments provided for optimal performance and reliability.