SUN HYDRAULICS
NCFCKBN

***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 NCFCKBN (NCFCKBN) is a needle valve with a reverse flow check, designed for precise regulation of hydraulic flow. This valve features an infinitely adjustable orifice, allowing for complete control from fully closed to the maximum orifice diameter. It includes an integral high-capacity check valve that ensures unrestricted flow from port 2 to port 1, although it is not pressure compensated. The design of this valve allows it to be interchangeable with all 2-port flow control cartridges of the same frame size, despite potential variations in cartridge extension dimensions from the mounting surface. The Sun Hydraulics NCFCKBN uses a balanced adjustment mechanism for ease of use even under high pressures, and its sharp-edged orifice minimizes flow variations due to viscosity changes. This model incorporates Sun's floating style construction to reduce internal component binding caused by excessive installation torque or machining variations. The valve has a cavity size of T-16A Series 3, with a capacity of 15 gpm (60 L/min) and can handle a maximum operating pressure of 5000 psi (350 bar). It has minimal leakage rates at specified conditions and offers adjustability through five and a half counterclockwise turns from fully closed to fully open. For installation, it requires specific torque settings: the valve hex size is 1-1/4 inches with an installation torque between 150 and 160 lbf ft; the adjustment screw internal hex size is 5/32 inches; the locknut hex size is 9/16 inches requiring a torque between 80 and 90 lbf in. The model weighs approximately 1.30 lb (0.60 kg), and its seal kit is available under part number Viton: 990-016-006.