Patent ID: 6517609
Filing Date: 2003-02-11
Classification: B01D,F16K,Y02C,Y10T

Abstract:
A method for avoiding and/or minimizing the contamination of an adsorbent by at least one impurity present in the ambient air contained in at least one gas treatment vessel of a gas treatment installation operating using a treatment cycle, at least part of which cycle is performed at a pressure below atmospheric pressure, the installation comprising:at least the gas treatment vessel containing at least the adsorbent, the vessel having at least one orifice, at least one gas pipe communicating with the orifice, at least one valve arranged on the gas pipe and controlling the flow of the gas flowing through the pipe, the valve comprising means of operating the valve and sealing means, the method comprising maintaining a protective gaseous atmosphere around at least some of the means of sealing the valve to create and/or to maintain a protective gaseous atmosphere around at least part of the means of sealing the valve.