Week 14 challenge

                                                                  Assembly of Butterfly Valve

The previously modeled components are assembled in a new assembly file. The body is placed first and the remaining parts are brought and constrained to it. 

GD&T is applied to the main areas of the assembly. Since this assembly is installed between pipes, the main areas of concern are the flat surfaces on both opposite sides of the cylinder. 

One of the flat sides of the body is assigned Datum A and 3 holes on that side are assigned Datums B,C & D with perpendicularity and positioning tolerances assigned. The other flat side is given a profile tolerance with respect to A, and the 3 holes on that surface are given position tolerances with respect to the holes that are assigned the datums.