SUN HYDRAULICS
NCFBKAV

***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 NCFBKAV (NCFBKAV) is a needle valve with reverse flow check, designed to regulate flow through an adjustable orifice. It allows for infinite adjustment from fully closed to the maximum orifice diameter, providing flexibility in flow regulation. The valve features an integral high-capacity check valve that ensures unrestricted flow from port 2 to port 1. Notably, this product is not pressure compensated, meaning the fixed orifice size regulates flow proportionally to the square root of the pressure differential across ports 1 and 2. This needle valve incorporates a balanced adjustment mechanism for easy adjustments even under high pressures and a sharp-edged orifice design that minimizes flow variations due to viscosity changes. Additionally, it employs Sun's floating style construction, which reduces the risk of internal part binding caused by excessive installation torque or machining variations in the cavity/cartridge. This two-port flow control cartridge is interchangeable with others of the same frame size, although extension dimensions may vary from the mounting surface. The NCFBKAV has a capacity of 30 gpm (120 L/min) and can operate at a maximum pressure of 5000 psi (350 bar). The maximum valve leakage at 110 SUS (24 cSt) is rated at 10 drops/min (0.7 cc/min). The adjustment mechanism allows for up to five 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 locknut torque of 80-90 lbf in (9-10 Nm). The model weighs approximately 1.30 lb (0.60 kg) and uses Viton seal kits with part number 990016006 for maintenance purposes.