Whitey S-18VF8 is an integral-bonnet needle valve from Whitey/Swagelok, designed to provide precise flow control in instrumentation and process lines. Listed as a ½" NPT steel valve, the S-18VF8 combines a compact form with an integral bonnet design to reduce leak paths and simplify servicing. Some listings also show a 3/4" NPT variant of the same basic model.
