SUN HYDRAULICS
NCGBYBV

***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 NCGBYBV (NCGBYBV) is a versatile needle valve with an integrated reverse-flow check, designed to provide precise flow regulation in hydraulic systems. This component allows for infinite adjustability from fully closed to the maximum orifice diameter, making it suitable for applications requiring fine-tuned flow control. The valve features a high-capacity check valve that ensures unrestricted flow from port 2 to port 1, though it is not pressure compensated. The NCGBYBV's design includes a balanced adjustment mechanism, facilitating easy adjustments even under high-pressure conditions. Its sharp-edged orifice minimizes flow variations caused by changes in fluid viscosity, enhancing its reliability in various operating environments. This model is compatible with all 2-port flow control cartridges of the same frame size, ensuring physical and functional interchangeability despite potential variations in cartridge extension dimensions from the mounting surface. It is important to note that this needle valve operates on a non-compensating basis; thus, the fixed orifice size regulates flow based on the square root of the pressure differential across ports 1 and 2. For systems utilizing phosphate ester fluids, cartridges configured with EPDM seals are recommended; however, these seals should not be exposed to petroleum-based fluids as they may incur damage. The NCGBYBV model incorporates Sun's floating-style construction to reduce internal binding risks due to excessive installation torque or machining variations. This robust design can handle capacities up to 60 gpm (240 L/min) and withstand maximum operating pressures of 5000 psi (350 bar). It has minimal leakage rates and precise adjustment capabilities facilitated by its internal hex adjustment screw and locknut system. The valve's installation requires specific torque settings for optimal performance and longevity.