SUN HYDRAULICS
NFCCHIV

***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 NFCCHIV (NFCCHIV) is a versatile needle valve designed for precise flow regulation in hydraulic systems. This fully adjustable orifice can be set from a fully closed position to the maximum orifice diameter, offering infinite adjustability. While not pressure compensated, it serves effectively as both a flow control and shutoff valve. The NFCCHIV model is part of a series of 2-port flow control cartridges that are interchangeable in terms of flow path and cavity size, although extension dimensions may vary. The valve's performance is characterized by its non-compensating nature, where the fixed orifice size regulates flow based on the square root of the pressure differential across ports 1 and 2. The NFCCHIV features a balanced adjustment mechanism that facilitates easy adjustment even under high pressures, while its sharp-edged orifice design reduces flow variations caused by viscosity changes. It supports bidirectional flow with a preferred path from port 1 to port 2 for compatibility with other flow controls. Notably, there is no leakage when the valve is fully shut off. Cartridges with EPDM seals are suitable for phosphate ester fluid systems but should avoid petroleum-based fluids to prevent seal damage. This model has a capacity of 7 gpm (28 L/min) and can operate at a maximum pressure of 5000 psi (350 bar). The adjustment mechanism allows up to 5.5 counterclockwise turns from fully closed to open positions. The valve installation requires specific torque settings: 30-35 lbf ft (41-47 Nm) for the valve and 80-90 lbf in (9-10 Nm) for the locknut. The NFCCHIV weighs .30 lb (.15 kg) and uses Viton seal kits identified by part number 990010006.