SUN HYDRAULICS
NFFDHIV

***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 NFFDHIV (Material Number: NFFDHIV) is a versatile needle valve designed for precise flow regulation in hydraulic systems. This component is fully adjustable and can be set from a completely closed position to the maximum orifice diameter, allowing for meticulous control over fluid flow. It is important to note that this valve is not pressure compensated, making it suitable for use as a flow control or shutoff valve. All two-port flow control cartridges are interchangeable in terms of flow path and cavity size, although cartridge extension dimensions may differ. The NFFDHIV model features a balanced adjustment mechanism that facilitates easy adjustments even under high-pressure conditions. Its sharp-edged orifice design effectively minimizes variations in flow caused by changes in fluid viscosity. The valve supports bidirectional flow; however, the preferred direction is from port 1 to port 2 to maintain compatibility with other flow control devices. This needle valve ensures zero leakage when the adjustment mechanism is set to the shutoff position. Cartridges equipped with EPDM seals are specifically designed for systems utilizing phosphate ester fluids, but they should not be exposed to petroleum-based fluids, greases, or lubricants as these can damage the seals. Key specifications include a maximum operating pressure of 5000 psi (350 bar), a capacity of 140 gpm (530 L/min), and an installation torque range of 350 - 375 lbf ft (474 - 508 Nm). The model's weight is approximately 3.00 lb (1.35 kg). For maintenance and repair purposes, Viton seal kits are available under part number 990018006.