SUN HYDRAULICS
RVEDWHN

***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 RVEDWHN (RVEDWHN) is a ventable, pilot-operated, balanced piston relief cartridge with an external drain, designed as a normally closed pressure regulating valve. This model opens to tank port 2 upon reaching the inlet port 1's valve setting, throttling flow to regulate pressure effectively. It features a vent port 3 for remote control via other pilot or 2-way valves and a drain port 4 to ensure insensitivity to back pressure. The RVEDWHN is known for its accuracy, low-pressure rise versus flow, smooth operation, quiet performance, and moderate speed. It can accept maximum pressure at port 2 and is suitable for cross-port relief circuits; however, users should consider spool leakage in such applications. The main stage orifice includes protection by a 150-micron stainless steel screen. This model is not recommended for load-holding applications due to spool leakage. Pressure at port 4 adds directly to the valve setting at a 1:1 ratio but should not exceed 5000 psi (350 bar). Cartridges with EPDM seals are intended for systems using phosphate ester fluids; exposure to petroleum-based fluids can damage these seals. The RVEDWHN incorporates Sun's floating style construction to minimize internal part binding from excessive installation torque or machining variations. This cartridge fits into the T-22A cavity series with a capacity of up to 30 gpm (120 L/min) and operates at a maximum pressure of 5000 psi (350 bar). Control pilot flow ranges from 10\u201315 in\u00b3/min (0.16\u20130.25 L/min), with typical response times around 10 ms and maximum valve leakage of approximately 3 in\u00b3/min at 1000 psi (50 cc/min at 70 bar). The adjustment requires up to five clockwise turns to increase settings, with specific torque requirements detailed for installation and adjustment components.