Description: Winters Multiport (NVA Series) and Block & Bleed (BBV Series) Needle Valves feature a one-piece, corrosion-resistant 316 stainless steel or carbon steel body, rated up to either 6,000 psi ...

A SATISFACTORY adjustable needle valve for admitting a small constant flow of gas into a highly exhausted vessel is difficult to make. A number of ingenious forms have been described by various ...

• The first step in selecting a valve is determining its function. • Review Cv or pressure drop when considering one valve versus another. • Don’t overlook maintenance requirements when specifying a ...