SUN HYDRAULICS
RVEDKDN

***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 RVEDKDN (RVEDKDN) is a ventable, pilot-operated, balanced piston relief cartridge designed for precise pressure regulation in hydraulic systems. This normally closed valve begins to open to tank port 2 when the inlet port 1 pressure reaches the set threshold, effectively throttling flow to maintain desired pressure levels. It features a vent port 3 for remote control by other pilot or two-way valves and a drain port 4 that ensures insensitivity to back pressure. The RVEDKDN is characterized by its accuracy, low-pressure rise versus flow, smooth operation, and moderate speed. Notably, it can handle maximum pressures at port 2 and is suitable for cross-port relief circuits, although spool leakage should be considered in such applications. The main stage orifice is safeguarded by a 150-micron stainless steel screen, but the valve is not suited for load-holding applications due to potential leakage. The pressure at port 4 adds directly to the valve setting at a 1:1 ratio and must not exceed 5000 psi (350 bar). Valves with EPDM seals are intended for systems using phosphate ester fluids; petroleum-based fluids can damage these seals. Adjustments can be made using W or Y controls across the full range unless a special setting limits the maximum setting. The Sun floating style construction minimizes internal binding risks from installation torque or machining variations. Technical specifications include a cavity size of T-22A Series 2 with a capacity of 30 gpm (120 L/min), factory pressure settings established at 4 gpm (15 L/min), maximum operating pressure of 5000 psi (350 bar), control pilot flow between 10-15 in\u00b3/min (0.16-0.25 L/min), typical response time of 10 ms, and maximum valve leakage at specified conditions of up to 3 in\u00b3/min (50 cc/min). The valve's physical dimensions include a hex size of 1-1/8 inches and installation torque requirements between 45-50 lbf\u00b7ft (61-68 Nm).