SUN HYDRAULICS
NCFBHBN

***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 NCFBHBN (NCFBHBN) is a needle valve with reverse flow check, designed to provide precise flow regulation through an adjustable orifice. This model features an integral high-capacity check valve that allows unrestricted flow from port 2 to port 1, although it is not pressure compensated. The 2-port flow control cartridge design ensures physical and functional interchangeability with similar-sized cartridges, allowing for consistent flow paths and cavity compatibility. However, the extension dimensions from the mounting surface can vary between different cartridges. This needle valve operates by regulating flow in proportion 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 that facilitates easy adjustments even under high-pressure conditions. Its sharp-edged orifice design helps minimize variations in flow caused by changes in fluid viscosity. Additionally, it incorporates Sun's floating style construction to reduce the risk of internal binding due to excessive installation torque or machining variations. The NCFBHBN model is designed for a cavity T-16A series 3 with a capacity of 30 gpm (120 L/min) and can withstand a maximum operating pressure of 5000 psi (350 bar). The maximum valve leakage at 110 SUS (24 cSt) is limited to 10 drops per minute (0.7 cc/min). It features an adjustment range of up to five full counterclockwise turns from fully closed to fully open. The valve's hex size is 1-1/4 inches (31.8 mm), with an installation torque requirement of 150-160 lbf ft (203-217 Nm). The adjustment screw has an internal hex size of 5/32 inches (4 mm), while the locknut hex size is 9/16 inches (15 mm), requiring a torque of 80-90 lbf in (9-10 Nm). The model weighs approximately 1.30 lb (0.60 kg) and comes with a Viton seal kit option identified as cartridge number 990016006.