SUN HYDRAULICS
NFFCLHN

***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 NFFCLHN (NFFCLHN) is a versatile needle valve designed for precise flow regulation in hydraulic systems. This fully adjustable orifice valve allows for infinite adjustment from a fully closed position to the maximum orifice diameter, offering flexibility in controlling flow rates. It is not pressure compensated, which means the flow regulation is dependent on the pressure differential across ports 1 and 2, following the square root relationship. The balanced adjustment mechanism ensures easy operation even under high-pressure conditions, while its sharp-edged orifice design minimizes variations due to changes in fluid viscosity. The bidirectional flow path favors port 1 to port 2 for interchangeability with other flow controls, and it ensures zero leakage when shut off. This needle valve fits into a Cavity T-18A and belongs to Series 4 with a capacity of 60 gpm (240 L/min). It can withstand a maximum operating pressure of 5000 psi (350 bar). The adjustment range spans 5.5 counterclockwise turns from fully closed to fully open, facilitated by an internal hex adjustment screw size of 5/32 inches (4 mm). The installation requires a torque between 350 and 375 lbf ft (474 - 508 Nm), with a locknut torque specification of 80 - 90 lbf in (9 - 10 Nm). The valve features EPDM seals suitable for phosphate ester fluid systems but must avoid petroleum-based fluids to prevent seal damage. Weighing approximately 3 pounds (1.35 kg), this model includes Viton seal kit option number: 990018006 for enhanced durability and compatibility with various hydraulic fluids.