SUN HYDRAULICS
NCGBYEV

***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 NCGBYEV (NCGBYEV) is a versatile needle valve with reverse flow check, designed to provide fully adjustable flow regulation. This model features an integral high-capacity check valve that allows for unrestricted flow from port 2 to port 1, making it suitable for applications where precise control of hydraulic fluid is required. The valve operates as a non-pressure compensated device, meaning the fixed orifice size regulates flow in proportion to the square root of the pressure differential across ports 1 and 2. It is equipped with a balanced adjustment mechanism, facilitating easy adjustments even under high pressure conditions. The NCGBYEV model incorporates a sharp-edged orifice design that minimizes flow variations due to changes in fluid viscosity. It also employs Sun's floating style construction, which reduces the risk of internal parts binding caused by excessive installation torque or machining variations in the cavity/cartridge. This ensures reliable performance and ease of maintenance. This needle valve is configured with EPDM seals, making it suitable for use in systems operating with phosphate ester fluids; however, it should not be exposed to petroleum-based fluids as this can damage the seals. The cartridge's physical dimensions ensure interchangeability across all 2-port flow control cartridges within its series and frame size, though extension dimensions may vary. The NCGBYEV has a cavity type T-18A and belongs to Series 4, offering a capacity of up to 60 gpm (240 L/min) with a maximum operating pressure of 5000 psi (350 bar). Its maximum valve leakage at 110 SUS (24 cSt) is limited to 10 drops per minute (0.7 cc/min). The adjustment range spans up to five and a half counterclockwise turns from fully closed to fully open. Key specifications include a valve 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 between 80 - 90 lbf in (9 -10 Nm). The model weighs approximately 3 pounds (1.35 kg).