The gas ballast is something that is misused a lot. The gas ballast on your vacuum pump should stay open until you hit 1500-2000 microns, then close it. It will conserve pump oil for the final pull down. This tip can also be found in most pump literature. If anyone has ever used the BluVac app, there is also a reminder around this point as well. #teachme

Posted by HVAC Know It All at 2021-02-21 01:01:06 UTC