SUN HYDRAULICS
NFDDLGE

***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 NFDDLGE (Material Number: NFDDLGE) is a versatile needle valve designed for precise flow regulation in hydraulic systems. It is equipped with a fully adjustable orifice that allows for infinite adjustment from fully closed to its maximum diameter, making it suitable for both flow control and shutoff applications. This valve is not pressure compensated, meaning the flow regulation depends on the square root of the pressure differential across its ports. The NFDDLGE features a balanced adjustment mechanism, facilitating easy adjustments even under high pressures. Its sharp-edged orifice design minimizes flow variations due to changes in fluid viscosity, ensuring consistent performance. The valve supports bidirectional flow, with a preferred path from port 1 to port 2 for compatibility with other flow control devices. It ensures zero leakage when the adjustment mechanism is in the shutoff position. The NFDDLGE model is compatible with systems using phosphate ester fluids when configured with EPDM seals; however, exposure to petroleum-based fluids can damage these seals. This needle valve fits into a T-5A cavity and offers a capacity of up to 50 gpm (200 L/min) at a maximum operating pressure of 5000 psi (350 bar). It requires an installation torque of 45-50 lbf-ft (61-68 Nm) and has an internal hex size of 5/32 inch (4 mm) for the adjustment screw. The locknut requires a torque of 80-90 lbf-in (9-10 Nm). With a weight of .60 lb (.30 kg), this model provides robust and reliable performance in demanding hydraulic applications.