SUN HYDRAULICS
NCGCYBV

***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 NCGCYBV (NCGCYBV) is a needle valve with reverse flow check, designed to provide fully adjustable flow regulation. It features a high-capacity check valve that allows unrestricted flow from port 2 to port 1 and is infinitely adjustable from fully closed to the maximum orifice diameter. This model is non-pressure compensated, meaning the fixed orifice size regulates flow proportional to the square root of the pressure differential across ports 1 and 2. The balanced adjustment mechanism ensures easy adjustments even at high pressures, while the sharp-edged orifice design minimizes flow variations caused by viscosity changes. The valve incorporates Sun's floating style construction, reducing the likelihood of internal parts binding due to excessive installation torque or machining variations. This model fits into a T-18A cavity and is part of Series 4 with a capacity of 30 gpm (120 L/min) at .38 inches (9.7 mm). It supports a maximum operating pressure of 5000 psi (350 bar) and has a maximum valve leakage rate of 5 drops per minute (0.3 cc/min) at 110 SUS (24 cSt). The adjustment range allows for up to 5.5 counterclockwise turns from fully closed to fully open. The valve has specific dimensions for installation: hex size of 1-5/8 inches (41.3 mm), installation torque between 350-375 lbf ft (474-508 Nm), internal hex size for adjustment screw at 5/32 inches (4 mm), locknut hex size at 9/16 inches (15 mm), and locknut torque ranging from 80-90 lbf in (9-10 Nm). The model weighs approximately 3 pounds (1.35 kg) and utilizes Viton seals with an available seal kit identified as cartridge Viton: 990018006.