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I bought the Pulsar pump from vacutech. In their product describtion they say the the max. is 24HG, which i restricted to 11HG for safety reasons. This is ok, as i did not go beyond 10HG, normally. So I thought is could be a perfect device for me.

But my device stops at 6,5HG for max. pressure (the vaccum is hold constantly at this level). I cannot raise the pressure to 7HG (or hold it there). At this point there is a constant knocking - like a machine gun. This happens in both modes (fixed and Pulsar).

I checked the pressure in the tube with my Hand pump - what to say: 6,5HG, not more!

I tried diff. tubes but the problem is the same, everytime at 7HG or higher.

I am very unhappy with that and maybe somebody out there can help (Vacutech´s answers are not helpful).
Thx
Vic.

Vic

Typically that occurs is there is a small leak in your tubing or fittings and the pumo can't keep up to the pressure drop.

Cheers

Try taking the restriction off, or raising the restriction to maybe like 15hg.

Following. My Pulsar has identical problem. I rarely go above 6, but would like to have the option!