SUN HYDRAULICS
NFCDKFV

***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 NFCDKFV (NFCDKFV) is a versatile needle valve designed for precise flow regulation in hydraulic systems. 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 shutoff valve. The needle valve is non-pressure compensated, meaning the flow regulation is based on the square root of the pressure differential across its two ports. It features a balanced adjustment mechanism that facilitates easy tuning even under high pressures, and its sharp-edged orifice design minimizes flow variations due to changes in fluid viscosity. The NFCDKFV model supports bidirectional flow, with a preferred path from port 1 to port 2 to ensure compatibility with other flow controls. Notably, the valve offers zero leakage when closed. This model fits into a T-13A cavity and has a capacity of 20 gpm (80 L/min) with a maximum operating pressure of 5000 psi (350 bar). The adjustment mechanism allows for 5.5 counterclockwise turns from fully closed to open positions. Installation requires a torque between 30 and 35 lbf ft (41 and 47 Nm), while the locknut torque specification is between 80 and 90 lbf in (9 and 10 Nm). For systems utilizing phosphate ester fluids, cartridges configured with EPDM seals are recommended; however, exposure to petroleum-based fluids can damage these seals. The NFCDKFV model weighs approximately .30 lb (.15 kg) and comes with an optional Viton seal kit under part number 990010006 for enhanced durability and performance in various applications.