Purging kegs

[Unicorn_Platypus]

When purging with a CO2 cylinder, you pressurize the keg, then shut off the gas, then release all of the keg's pressure (not a second or two). Turn the gas back on and repeat the whole thing "X" times. Here's a chart that might be helpful.

View attachment 814096

Great table!

 

[Unicorn_Platypus]

Another thing I find beneficial is adding dextrose & ascorbic when dry hopping to scrub any O2 introduced. 5g ascorbic acid & 12g dextrose does the trick

I also like to naturally carbonate all my kegs with priming sugar instead of force carbonation. This further mitigates any oxygen introduced as the yeast will consume it.

For adding the priming sugar, I use a 500mg syringe and inject to the purged keg via the gas post. See picture attached. Virtually no air is introduced as I ensure to push it out of the line before hooking up to the keg.

My beers stay hoppy & bright for many months.

Also, if you have silicone O rings get rid of them and replace with EPDM or Buna N or the new kegland low2 ones. This helps further protect the shelf life as these materials are less permeable to O2