SUN HYDRAULICS
RVCDLHV

***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 RVCDLHV (RVCDLHV) is a ventable, pilot-operated, balanced piston relief cartridge with an external drain 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, throttling flow to maintain desired pressure levels. It features a vent port 3 for remote control and a drain port 4, making it insensitive to back pressure. The valve is known for its accuracy, low-pressure rise versus flow, smooth operation, quietness, and moderate response speed of about 10 ms. The RVCDLHV can handle maximum pressures at port 2 and is suitable for cross-port relief circuits; however, users should consider spool leakage in such applications. It incorporates a main stage orifice protected by a 150-micron stainless steel screen but is not recommended for load-holding applications due to potential leakage. The valve setting is directly influenced by the pressure at port 4 at a 1:1 ratio, with a maximum allowable pressure of 5000 psi (350 bar). Cartridges configured with EPDM seals are compatible with phosphate ester fluids but are vulnerable to petroleum-based substances. The valve offers adjustable settings using W or Y controls unless specified otherwise for special settings. Its construction minimizes internal binding risks due to installation torque or machining variations. With a cavity T-21A series and capacity of up to 15 gpm (60 L/min), this model requires installation torque between 30-35 lbf ft (41-47 Nm). The adjustment screw has an internal hex size of 5/32 inches (4 mm), and the locknut requires torque between 80-90 lbf in (9-10 Nm). Weighing .40 lb (.20 kg), it provides reliable performance in various hydraulic applications requiring precise pressure control.