Ashcroft Instrument Needle & Pressure Limiting Valve

The steel needle valve is an economical, adjustable throttling device for any severe gauge application. It provides the most practical means for varying the orifice to determine the exact orifice for any specific service condition. 

The valve has an internal seat and is of bar stock construction. Protects pressure instruments against surges and pulsations. Provides automatic positive protection and accurate, repeatable performance. Automatic pressure shut-off. Built-in snubber enhances instrument, protecting performance. Assures positive, repeatable performance of the instrument by protecting against surges and pulsations. 

Automatically shuts off when overpressure occurs and is restored when pressure falls below preset values.