Can anyone tell where to get various HVAC 3D valve drawings

[QUOTE=Nidal Awad]Can anyone tell where to get various HVAC 3D valve drawings[/QUOTE]Have you see here in CAD Blocks.?

I did ,but still i need NRV and DRV....flexibles,i am preparing a 3 D pump room.heat exchangers will also be a big help.

Now that is a lot of brass air fittings http://www.liangdianup.com/subpages/airfitting_1.htm  there is just about every typeof air fitting that you could want. Wholesale prices too. I guess these could be used as small water pipe fitting also. Iused some of the parts to make my babington wvo burner.