SUN HYDRAULICS
RPIELEV

***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 RPIELEV (Material Number: RPIELEV) is a fast-acting, pilot-operated, balanced piston relief cartridge designed primarily to protect hydraulic components from pressure transients. These normally closed, pressure-limiting valves open to the tank port when the inlet pressure reaches the valve setting, effectively throttling flow to manage pressure rise. The RPIELEV is notable for its quick response time of approximately 2 milliseconds and low pressure rise versus flow characteristics. It features a main stage orifice protected by a 150-micron stainless steel screen and incorporates Sun's floating style construction to reduce internal binding risks due to installation torque or machining variations. This model is physically and functionally interchangeable with other 2-port relief cartridges of the same frame size, making it suitable for cross port relief circuits, although spool leakage should be considered in such applications. It can handle a maximum operating pressure of up to 5000 psi (350 bar) and has a capacity of 100 gpm (380 L/min). The valve setting can be adjusted by turning its adjustment screw clockwise up to five times. However, it is not recommended for load-holding applications due to potential spool leakage. The RPIELEV also features backpressure at the tank port being directly additive to the valve setting at a 1:1 ratio. Its installation requires a torque between 150-160 lbf\u00b7ft (203-217 Nm), with specific hex sizes for both the valve and locknut adjustments. The model weighs approximately 1.20 lb (0.55 kg) and uses Viton seal kits for optimal performance in various environments.