Patent ID: 8419816

Claim:
A gas isolation valve that in use facilitates the harvesting of a product from a reaction vessel and to remove a member selected from the group consists of reactive gases, volatile gases, and reactive and volatile gases present in said reaction vessel during harvesting, comprising: a chamber having a physical barrierless channel with a configuration which neither impedes nor inhibits the transfer of the product from said reaction vessel to atmosphere, wherein said chamber comprises a plurality of sections having evacuation sections having chamber evacuation nozzles, alternating with gas input sections having gas input nozzles, wherein each adjacent evacuation section and gas input section forms a discrete stackable unit of said plurality of sections assembled in modular form, and wherein a gas tight seal is provided between said adjacent evacuation section and said gas input section and between each of said discrete stackable units, whereby in use traces of the member selected from the group consisting of reactive gases, volatile gases, and reactive and volatile gases from said reaction vessel are diminished progressively by each of said discrete stackable units such that the member selected from the group consisting of reactive gases, volatile gases, and reactive and volatile gases are isolated from the atmosphere at a base of the gas isolation valve.