SUN HYDRAULICS
RVCDCHV

***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 RVCDCHV (RVCDCHV) is a ventable, pilot-operated, balanced piston relief cartridge designed for precise pressure regulation with an external drain. This normally closed valve opens to tank port 2 when the inlet port 1 pressure reaches the set level, effectively throttling flow to maintain the desired pressure. It features a vent port (port 3) for remote control via other pilot or two-way valves and a drain port (port 4), making it insensitive to back pressure. Known for its accuracy and low-pressure rise versus flow characteristics, this valve operates smoothly and quietly with moderate speed. It can accept maximum pressure at port 2, making it suitable for cross-port relief circuits; however, spool leakage should be considered in such applications. The main stage orifice is safeguarded by a 150-micron stainless steel screen. It's important to note that this valve is not ideal for load-holding applications due to spool leakage. Pressure at port 4 directly affects the valve setting at a 1:1 ratio but should not exceed 5000 psi (350 bar). Cartridges with EPDM seals are compatible with phosphate ester fluids but may suffer damage from petroleum-based fluids and lubricants. The RVCDCHV incorporates Sun's floating style construction, minimizing internal part binding risks due to excessive installation torque or machining variations. Key specifications include a cavity T-21A, Series 1 capacity of 15 gpm (60 L/min), maximum operating pressure of 5000 psi (350 bar), control pilot flow of 7\u201310 in\u00b3/min (0.11\u20130.16 L/min), typical response time of 10 ms, and maximum valve leakage of 2 in\u00b3/min at 110 SUS/24 cSt under conditions of up to 1000 psi (30 cc/min at up to 70 bar). The adjustment requires up to five clockwise turns to increase settings, with specific torque values provided for installation and adjustments.