SUN HYDRAULICS
NEEDLE CARTRDGE
NFEDLHN

***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 NFEDLHN (Material Number: NFEDLHN) is a versatile needle valve designed for precise flow regulation. This fully adjustable orifice allows for infinite adjustment from fully closed to the maximum orifice diameter, making it suitable for use as both a flow control and a shutoff valve. Although not pressure compensated, it can effectively manage flow in proportion to the square root of the pressure differential across ports 1 and 2. The valve features a balanced adjustment mechanism that ensures ease of operation even under high pressures, while its sharp-edged orifice design reduces flow variations due to changes in fluid viscosity. The bidirectional flow path is optimized for interchangeability with other flow controls, with the recommended direction being port 1 to 2. When the adjustment mechanism is set to the shutoff position, the valve guarantees zero leakage. The NFEDLHN is configured with EPDM seals, suitable for systems using phosphate ester fluids; however, exposure to petroleum-based fluids can damage these seals. It fits a Cavity T-16A Series 3 and boasts a capacity of 90 gpm (340 L/min) with a maximum operating pressure of 5000 psi (350 bar). The adjustment range from fully closed to open spans 5.5 turns counterclockwise, and installation requires a torque between 150-160 lbf ft (203-217 Nm). The internal hex size for adjustment screws is ^5/32 inches (4 mm), while the locknut hex size measures ^9/16 inches (15 mm), requiring torque of 80-90 lbf in (9-10 Nm). Weighing in at approximately 1.30 lbs (0.60 kg), this model offers robust performance in hydraulic applications where precise control and reliability are paramount.