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® WorleyParsons <br /> resources&energy <br /> Branch headers will have a shutoff valve at the takeoff from the main header. The branch <br /> headers will be sized for the air usage of the instruments served, but will be no smaller than <br /> 3/8 inch. Each instrument air user will have a shutoff valve, filter, and regulator (where <br /> appropriate) at the instrument. <br /> Lodi Energy Center 3.5- 13 LEC AFC <br /> 071608 Rev.A <br />