SUN HYDRAULICS
RPIEMEV

***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 RPIEMEV (RPIEMEV) is a fast-acting, pilot-operated, balanced piston relief cartridge designed to protect hydraulic components from pressure transients. This normally closed, pressure-limiting valve quickly opens and closes, offering rapid response at the expense of smoothness. When the inlet port pressure reaches the valve setting, it begins to open to the tank port, throttling flow to limit pressure rise. It features a low pressure rise versus flow and is highly responsive with a typical response time of 2 milliseconds. The valve is interchangeable with other 2-port relief cartridges of the same frame size and flow path. This model can handle maximum operating pressures up to 5000 psi (350 bar) and a capacity of 100 gpm (380 L/min). It incorporates Sun's floating style construction to minimize internal binding risks due to installation torque or machining variations. The main stage orifice is protected by a 150-micron stainless steel screen, although it is not suitable for load holding applications due to spool leakage. It accepts maximum pressure at port 2 and can be used in cross-port relief circuits with consideration for spool leakage. For installation, the valve hex size is 1 1/4 inches (31.8 mm), requiring a torque of 150-160 lbf ft (203-217 Nm). Adjustment can be made via an internal hex screw with up to five clockwise turns needed to increase settings. A locknut secures adjustments with a torque specification of 80-90 lbf in (9-10 Nm). The valve's seal kit uses Viton material for durability under various conditions.