This is interesting. After learning the hard way the first time , ( sucking wine into my vacuum pump ) I now leave a large head space and don't have any issues with foam or liquid going into the pump. I also don't have any gauges on the system.
The only thing I'm going to do eventually is put a relief valve in line to relieve the pressure when I'm finished. When I break the seal from the stopper when finished the wine does have a violent reaction unless I can do it gently.
The only thing I'm going to do eventually is put a relief valve in line to relieve the pressure when I'm finished. When I break the seal from the stopper when finished the wine does have a violent reaction unless I can do it gently.