SUN HYDRAULICS
NFDCLBN/LH

***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 NFDCLBN/LH (NFDCLBN/LH) is a versatile needle valve designed for precise flow regulation in hydraulic systems. This fully adjustable orifice valve allows for infinite adjustments from fully closed to the maximum orifice diameter, making it suitable for applications requiring meticulous flow control or complete shutoff. Notably, this needle valve is not pressure compensated, meaning the flow regulation through the valve is dependent on the square root of the pressure differential across its ports. It features a balanced adjustment mechanism that ensures ease of use even at high pressures, and its sharp-edged orifice design minimizes flow variations due to changes in fluid viscosity. The bidirectional flow path offers flexibility in system integration, with a preferred direction from port 1 to port 2 to maintain compatibility with other flow controls. This model is part of Sun Hydraulics' Series 2 and has a capacity of up to 12 gpm (45 L/min) with a maximum operating pressure of 5000 psi (350 bar). The needle valve's physical specifications include a cavity size T-5A and an overall weight of 0.60 lb (0.30 kg). Its installation requires a torque range between 45-50 lbf ft (61-68 Nm), while the locknut requires a torque setting between 80-90 lbf in (9-10 Nm). Additionally, this cartridge model can be configured with EPDM seals for use with phosphate ester fluids; however, exposure to petroleum-based fluids should be avoided as it may damage these seals. For maintenance purposes, it utilizes Viton seal kits under part number 990203006.