SUN HYDRAULICS
NCGCHCN

***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 NCGCHCN (NCGCHCN) is a needle valve with a reverse-flow check, designed to regulate flow through an adjustable orifice. This valve allows for infinite adjustment from fully closed to the maximum orifice diameter, offering versatility in flow control applications. It incorporates an integral high-capacity check valve that provides unrestricted flow from port 2 to port 1, although it is not pressure compensated. The NCGCHCN model features a balanced adjustment mechanism, facilitating easy adjustments even under high-pressure conditions, and utilizes a sharp-edged orifice design to minimize flow variations due to viscosity changes. Its construction includes Sun's floating style design, which reduces the risk of internal parts binding caused by excessive installation torque or cavity-cartridge machining variations. This model fits into cavity T-18A and belongs to Series 4 with a capacity of 30 gpm (120 L/min). It can withstand a maximum operating pressure of 5000 psi (350 bar) and has a maximum valve leakage rate of 5 drops/min at 110 SUS (24 cSt). The needle valve requires up to five turns counterclockwise for full adjustment from closed to open positions. It has specific installation requirements, including a valve hex size of 1-5/8 inches and an installation torque range of 350\u2013375 lbf ft (474\u2013508 Nm). The adjustment screw has an internal hex size of 5/32 inches, while the locknut requires a hex size of 9/16 inches and torque between 80\u201390 lbf in (9\u201310 Nm). The model weighs approximately 3.00 lb (1.35 kg) and uses Viton seals with seal kit number 990018006 available for maintenance purposes.