There are actually different drive gauge valves but typically They are going to be sent either with the inspection flange or with no it. What's variation in two way manifold valve & gauge valve? I dunno why my common supervisor mentioned that use gauge valve as opposed to 2 way http://double-block-and-bleed-va08405.ivasdesign.com/11955405/the-fact-about-gauge-valve-that-no-one-is-suggesting