SUN HYDRAULICS
RVISKNN

***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 RVISKNN (Material Number: RVISKNN) is a ventable, pilot-operated, balanced poppet relief cartridge that functions as a normally closed pressure regulating valve. Designed to open to tank port 2 when the inlet port 1 pressure reaches the valve setting, it efficiently throttles flow to maintain pressure. Featuring a vent port 3 for remote control via other pilot or 2-way valves, this model is known for its precision, low pressure rise versus flow, smooth operation, quiet performance, and moderate speed. It effectively mitigates cavitation issues like noise and manifold erosion due to its internal modulating capabilities. The RVISKNN is ideal for load-holding applications provided that any valving on vent port 3 is zero leak and can handle maximum pressure at port 2, making it suitable for cross-port relief circuits. The valve's setting can be controlled below its own setting with a remote pilot relief on the vent port. It remains relatively unaffected by varying oil temperatures and contamination due to its robust design which includes a main stage orifice protected by a 150-micron stainless steel screen. The back pressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. Its construction minimizes internal binding risks from excessive torque or machining variations. With a cavity T-19A series and capacity of up to 120 gpm (480 L/min), this cartridge operates at pressures up to 5000 psi (350 bar) with control pilot flow between 15-20 in\u00b3/min (0.25-0.33 L/min). The typical response time is approximately 2 ms with minimal leakage at reseat and adjustable settings via an internal hex screw with locknut for secure adjustments.