SUN HYDRAULICS
RVCDLWN

***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 RVCDLWN (RVCDLWN) is a ventable, pilot-operated, balanced piston relief cartridge with an external drain designed for precise pressure regulation. These normally closed valves open to tank port 2 when inlet port 1 pressure reaches the valve setting, effectively throttling flow to maintain stable pressure levels. They feature a vent port 3 for remote control through other pilot or two-way valves and a drain port 4 that ensures insensitivity to back pressure. Notably, these valves are characterized by their accuracy, low-pressure rise relative to flow, smooth and quiet operation, and moderate response speed. Capable of handling a maximum operating pressure of 5000 psi (350 bar), they are suitable for cross-port relief circuits but are not recommended for load-holding applications due to spool leakage considerations. The valve's main stage orifice is safeguarded by a 150-micron stainless steel screen. For systems using phosphate ester fluids, cartridges with EPDM seals are appropriate; however, exposure to petroleum-based fluids can damage these seals. The RVCDLWN model incorporates Sun's floating style construction to prevent internal part binding caused by excessive installation torque or cavity/cartridge machining variations. It boasts a capacity of 15 gpm (60 L/min) with factory pressure settings established at 4 gpm (15 L/min). The control pilot flow ranges from 7\u201310 in\u00b3/min (0.11\u20130.16 L/min), with typical response times around 10 ms. The valve allows adjustment through clockwise turns up to five and a half turns for increasing settings, featuring an internal hex size adjustment screw of 5/32 in (4 mm). Additionally, the model weighs approximately .40 lb (0.20 kg) and comes with a Viton seal kit option under part number 990021006.