Developed by using latest CNC technology, offered Brass Non Return Valve is used for preventing flow of gas back to the source. Offered valve is mainly used as integral part of variable area flow meter and mass flow meter. Metal to metal seat structure of this Brass Non Return Valve ensures trouble free shut off of flow path. This type of valve adopts tapered pin to generate required space for controlling flow of gas. Special design of this brass valve promotes consistent flow of gas irrespective of its stem location. Quality of its O ring seal does not damage in case of its over tightening.