MinnesotaHomegrown303
Active Member
I have a .9cf HFS vac oven and a 3 cfm 2 stage vac pump. My pump has two connections and have read that a bleed valve can be added on to the unused connection but do not understand how this valve would know when to bleed fresh air to keep my desired level of vacuum. I have also read about bleeding nitrogen directly into the oven when the vac reaches 29.5. I am trying to calibrate my system so that my pump runs continuously but never pulls deeper than 29.5 or at my elevation in Denver 24.4(24.9 is my max at this elevation).