SUN HYDRAULICS
NCECHBN

***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 NCECHBN (NCECHBN) is a needle valve with a reverse flow check, designed for precise flow regulation in hydraulic systems. This component features an adjustable orifice, allowing for infinite adjustment from fully closed to the maximum orifice diameter, facilitating controlled fluid flow. It includes an integral high-capacity check valve that permits unrestricted flow from port 2 to port 1. Notably, the valve is not pressure compensated and relies on the square root of the pressure differential across ports 1 and 2 to regulate flow due to its non-compensating nature. The valve's design incorporates a balanced adjustment mechanism for ease of use under high pressures and a sharp-edged orifice to minimize variations in flow caused by changes in fluid viscosity. The floating style construction helps prevent internal binding due to excessive installation torque or machining variations. The NCECHBN model fits into cavity T-5A and is part of Series 2 with a capacity of 3 gallons per minute (11 liters per minute). It can withstand a maximum operating pressure of 5000 psi (350 bar) and has minimal leakage at specified conditions. The valve's dimensions include a hex size of 1-1/8 inches for installation torque between 45-50 lbf ft, an adjustment screw internal hex size of 5/32 inches, and a locknut hex size of 9/16 inches with corresponding torque requirements. Weighing approximately .40 lb (0.20 kg), this model uses Viton seal kits for effective sealing under various operational conditions.