APPARATUS AND METHODS TO DISPENSE FLUID FROM A BANK OF CONTAINERS AND TO REFILL SAME

摘要

A valve has a bonnet with a bonnet cavity and a first pressure sensing passageway extending between the bonnet outer surface and the bonnet cavity. A base is coaxially coupled to the bonnet. A fluid inlet passageway extends between the base outer surface and the base cavity. A fluid outlet passageway extends between the base outer surface and the base cavity, and a second pressure sensing passageway extends between the base outer surface and the base cavity. A valve element within the base and bonnet cavities controls a fluid flow path through the fluid inlet passageway and the fluid outlet passageway. The valve is suitable for use in a cascade system includes a manifold having a fluid outlet port to dispense fluid and a fluid valve engaged to the manifold.