SUN HYDRAULICS
RPICWQN

***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 RPICWQN (RPICWQN) is a 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. Known for its accuracy and smooth operation, this cartridge features a low pressure rise versus flow and provides moderately fast response times, with typical response time being 10 milliseconds. It is capable of handling maximum pressures up to 5000 psi (350 bar) and can accept maximum pressure at port 2. The valve's main stage orifice is safeguarded by a 150-micron stainless steel screen, ensuring durability and reliability. This relief cartridge is suitable for use in cross-port relief circuits but should be noted for its spool leakage, making it unsuitable for load-holding applications. Additionally, any back pressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. The RPICWQN model incorporates Sun\u2019s floating style construction to reduce potential binding of internal parts due to excessive installation torque or machining variations. For enhanced versatility, this model allows adjustments throughout its full range using W or Y controls unless a specific setting is specified as the maximum setting. Cartridges configured with EPDM seals are compatible with phosphate ester fluids but should avoid exposure to petroleum-based substances as they may damage the seals. The valve has interchangeable capabilities with other two-port relief cartridges of similar frame size and configuration. It requires an installation torque between 150-160 lbf ft (203-217 Nm) and features an adjustment screw internal hex size of 5/32 in (4 mm). The model weighs approximately 1.20 lb (0.55 kg) and comes with a Viton seal kit option for added compatibility with various fluid types.