These drawings contain over 1,100 blocks! Valve blocks are divided into two separate categories, Dynamic and Standard blocks.  Boths blocks will work with any version of AutoCAD.  If you don't know about dynamic blocks, check out the AutoCAD webpage!  Dynamic blocks are a very easy way to store large numbers of blocks in the libraries within AutoCAD. 

For all flanged valves, each block contains a flange pair containing a weld neck flange and gaskets.