SUN HYDRAULICS
RVGALFN

***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 RVGALFN (RVGALFN) is a ventable, pilot-operated, balanced piston relief cartridge designed as a normally closed pressure regulating valve. This valve opens to tank port 2 when the inlet port 1 pressure reaches the set threshold, throttling flow to regulate pressure. It features a vent port 3 for remote control via other pilot or 2-way valves. Known for accuracy and low pressure rise versus flow, the RVGALFN operates smoothly and quietly with moderate speed. The valve accepts maximum pressure at port 2 and is suitable for cross-port relief circuits, though spool leakage should be considered in such applications. The main stage orifice is safeguarded by a 150-micron stainless steel screen. Notably, it is not suitable for load holding applications due to potential spool leakage. Back pressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. Cartridges with EPDM seals are compatible with phosphate ester fluids but are susceptible to damage from petroleum-based substances. The Sun floating style construction reduces internal binding risks due to installation torque or machining variations. The RVGALFN fits within the Cavity T-17A Series 3 and has a capacity of up to 60 gpm (240 L/min). It can withstand a maximum operating pressure of 5000 psi (350 bar), with control pilot flow ranging from 15-20 in\u00b3/min (0.25-0.33 L/min). Typical response time is around 10 ms, and maximum valve leakage at specified conditions is approximately 4 in\u00b3/min (65 cc/min). The adjustment mechanism allows up to five clockwise turns to increase settings, with specific torque requirements for installation and adjustments provided in detailed specifications.