SUN HYDRAULICS
NCGBKEN

***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 NCGBKEN (NCGBKEN) is a needle valve with a reverse-flow check, designed for precise flow regulation in hydraulic systems. This valve is fully adjustable, allowing for infinite control from fully closed to the maximum orifice diameter. It features an integral high-capacity check valve that permits unrestricted flow from port 2 to port 1, although it is not pressure compensated. The NCGBKEN is part of the Sun Hydraulics series of 2-port flow control cartridges, which are interchangeable in terms of flow path and cavity size. However, the extension dimensions from the mounting surface may vary depending on the cartridge. The valve operates by regulating flow through a fixed orifice size proportional to the square root of the pressure differential across ports 1 and 2, due to its non-compensating nature. It includes a balanced adjustment mechanism for easy manipulation even under high pressures and a sharp-edged orifice design that reduces flow variations caused by viscosity changes. The cartridge employs Sun's floating style construction to minimize internal binding issues due to installation torque or machining variations. It is compatible with systems using phosphate ester fluids when configured with EPDM seals but should not be exposed to petroleum-based fluids as this will damage the seals. The NCGBKEN has a capacity of 60 gpm (240 L/min) and can withstand a maximum operating pressure of 5000 psi (350 bar). The valve's leakage rate at standard conditions is minimal, at just 10 drops/min (0.7 cc/min). Installation requires specific torques for various components, ensuring secure fitting and optimal performance.