SUN HYDRAULICS
RVEDKHN

***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 RVEDKHN (RVEDKHN) is a ventable, pilot-operated, balanced piston relief cartridge with an external drain. These normally closed pressure regulating valves are designed to open to tank port 2 when the inlet port 1 pressure reaches the valve setting, thereby throttling flow to regulate pressure. Equipped with a vent port 3 for remote control and a drain port 4 that ensures insensitivity to back pressure, these valves are known for their accuracy, low pressure rise versus flow, smooth operation, quiet performance, and moderate speed. The RVEDKHN can withstand 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 protected by a 150-micron stainless steel screen. However, it is not suitable for load-holding applications due to potential 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 will damage these seals. The valve features Sun's floating style construction to prevent internal binding from excessive installation torque or machining variations. It fits into a Cavity T-22A Series 2 and has a capacity of up to 30 gpm (120 L/min). Factory pressure settings are established at 4 gpm (15 L/min), with a maximum operating pressure of 5000 psi (350 bar). Control pilot flow ranges from 10-15 in\u00b3/min (0.16-0.25 L/min), and typical response time is around 10 ms. Maximum valve leakage at 110 SUS (24 cSt) is about 3 in\u00b3/min (50 cc/min) at 1000 psi (70 bar). Adjustment requires up to five clockwise turns, and the valve's hex size is 1-1/8 inch (28.6 mm), with installation torque between 45-50 lbf ft (61-68 Nm).