SUN HYDRAULICS
NCGCHEV

***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 NCGCHEV (NCGCHEV) is a needle valve with a reverse-flow check, designed to provide precise flow regulation in hydraulic systems. This valve features an adjustable orifice that allows for infinite adjustment from fully closed to the maximum orifice diameter, making it suitable for applications requiring variable flow control. It incorporates an integral high-capacity check valve that enables unrestricted flow from port 2 to port 1. This model is not pressure compensated, meaning the fixed orifice size controls flow in proportion to the square root of the pressure differential across ports 1 and 2. The NCGCHEV is part of Sun's Series 4 cartridges, offering a capacity of up to 30 gpm (120 L/min) and capable of handling a maximum operating pressure of 5000 psi (350 bar). Its design includes a sharp-edged orifice that minimizes flow variations due to changes in fluid viscosity, and a balanced adjustment mechanism for ease of use even at high pressures. The floating style construction helps prevent internal parts from binding due to excessive installation torque or machining variations. The valve is physically and functionally interchangeable with other 2-port flow control cartridges in its series, though extension dimensions may vary. It has specific installation requirements including a torque specification of 350-375 lbf ft (474-508 Nm) and features such as an internal hex adjustment screw size of 5/32 inches (4 mm). The valve also includes corrosion-resistant zinc-nickel plating and Viton seals for enhanced durability in demanding environments. The model weighs approximately 3 pounds (1.35 kg) and uses seal kit number 990018006 for maintenance purposes.