SUN HYDRAULICS
NCGCKBN

***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 NCGCKBN (NCGCKBN) is a needle valve with a reverse-flow check, designed as a fully adjustable orifice for precise flow regulation. It allows for infinite adjustment from fully closed to the maximum orifice diameter, with an integral high-capacity check valve that ensures unrestricted flow from port 2 to port 1. This model is not pressure compensated, meaning the fixed orifice size regulates flow in proportion to the square root of the pressure differential across ports 1 and 2. Notably, all 2-port flow control cartridges are interchangeable in terms of flow path and cavity for a given frame size, although cartridge extension dimensions may vary. The balanced adjustment mechanism facilitates easy adjustments even at high pressures, while the sharp-edged orifice design minimizes flow variations due to changes in viscosity. The valve incorporates Sun\u2019s floating style construction to reduce the risk of internal parts binding from excessive installation torque or machining variations. The NCGCKBN model fits into cavity T-18A and belongs to Series 4 with a capacity of 30 gpm (120 L/min) and a maximum operating pressure of 5000 psi (350 bar). It has a maximum valve leakage at 110 SUS (24 cSt) of five drops per minute (0.3 cc/min). The adjustment range spans up to five counterclockwise turns from fully closed to fully open. Installation requires specific torques: valve installation torque ranges between 350 - 375 lbf ft (474 - 508 Nm), and locknut torque is between 80 - 90 lbf in (9 - 10 Nm). The model weighs approximately 3.00 lb (1.35 kg) and uses Viton seal kits under part number 990018006.