Swagelok SS-3NBF4 Severe Service Union Bonnet Needle Valve 1 Quarter Inch FNPT

The Swagelok SS-3NBF4 Severe Service Union Bonnet Needle Valve is a stainless steel valve with a union bonnet and 1/4 in FNPT end connections, designed for demanding service in process lines. With a Cv of 0.35, it offers precise throttling and reliable shut-off for controlled flow of liquids or gases in severe-service environments. The design features a ball stem and union bonnet, a configuration that supports smooth operation and robust performance under challenging conditions. End connections are 1/4 in FNPT, allowing straightforward integration into standard piping and Swagelok tube-fitting systems.