SUN HYDRAULICS
RPEEFEV

***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 RPEEFEV (RPEEFEV) is a fast-acting, pilot-operated, balanced piston relief cartridge designed to protect hydraulic components from pressure transients. This normally closed, pressure-limiting valve opens quickly at the expense of smoothness when the inlet port 1 reaches the set pressure, directing flow to tank port 2 to limit pressure rise. It is characterized by a low pressure rise versus flow and rapid response time of approximately 2 milliseconds. The valve can handle a maximum operating pressure of 5000 psi (350 bar) and has a capacity of 25 gpm (95 L/min). It is suitable for cross-port relief circuits but not recommended for load-holding applications due to spool leakage. The main stage orifice is safeguarded by a 150-micron stainless steel screen, ensuring reliability in operation. Additionally, back pressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. The RPEEFEV model incorporates Sun's floating style construction to minimize potential binding from installation torque or cavity machining variations. For installation, this cartridge requires a T-10A cavity and has specific torque requirements: valve installation torque ranges from 30 to 35 lbf-ft (41 to 47 Nm), while the locknut requires between 80 and 90 lbf-in (9 to 10 Nm). Adjustment is made via an internal hex screw with five full clockwise turns needed to increase settings. The valve's design allows it to be interchangeable with other two-port relief cartridges within the same frame size and flow path. Its compact design weighs just .30 lb (0.15 kg), making it an efficient component for various hydraulic systems requiring precise and rapid pressure regulation.