SUN HYDRAULICS
RVCDKEV

***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 RVCDKEV (RVCDKEV) is a ventable, pilot-operated, balanced piston relief cartridge with an external drain, functioning as a normally closed pressure regulating valve. When the inlet port 1 reaches the specified pressure setting, the valve opens to tank port 2, throttling flow to maintain the desired pressure level. The design includes a vent port 3 for remote control and a drain port 4 to ensure insensitivity to back pressure. This valve is characterized by its accuracy, low pressure rise against flow, smooth operation, quietness, and moderate speed. It features a remote pilot relief on the vent port 3 that allows control below its own setting and can handle maximum pressure at port 2, making it suitable for cross-port relief circuits while considering spool leakage. The valve's main stage orifice is protected by a 150-micron stainless steel screen; however, it is not suitable for load-holding applications due to spool leakage. The pressure at port 4 adds directly to the valve setting at a 1:1 ratio and must not exceed 5000 psi (350 bar). Cartridges with EPDM seals are intended for systems using phosphate ester fluids but will be damaged by petroleum-based products. The RVCDKEV uses Sun's floating style construction to minimize binding from excessive installation torque or machining variations. With a cavity type T-21A and series capacity of up to 15 gpm (60 L/min), it operates under maximum pressure conditions of up to 5000 psi (350 bar) with typical response times around 10 ms. The valve features adjustable settings via W or Y controls and incorporates several user-friendly adjustments such as an internal hex size adjustment screw and locknut torque specifications. It weighs approximately .40 lb (.20 kg) and is compatible with Viton seal kits like model number 990021006.