How many times to purge and at what pressure?

[royger]

Hello,

I have a pressure rated fermenter and I dry hop under pressure from a TC port. I'm however wondering how many times people purge the dry hopper and at what pressure. According to the table in:
https://cdn.homebrewtalk.com/data/attach/760/760454-ppm-O2-after-purge-table-2.png
For example I would need to do 18 purge cycles at 25psi to reach a 0.00ppm level of O2 content. Do people aim for a 0.00ppm level of O2, or is if fine to target a slightly higher level of O2 ppm?

Thanks.

 

[DuncB]

I would read and follow this advice.

Post in thread 'Keg purging with active fermentation' https://www.homebrewtalk.com/threads/keg-purging-with-active-fermentation.628658/post-8004741

I do the fill to full with Starsan and then purge with ferment gas.

 

[royger]

I would read and follow this advice.

Post in thread 'Keg purging with active fermentation' https://www.homebrewtalk.com/threads/keg-purging-with-active-fermentation.628658/post-8004741

I do the fill to full with Starsan and then purge with ferment gas.

Hello,

Do you fill the dry hopper with Starsan and push it with CO2? I do find this weird, as you then have to open the dry hopper to add the hops after having purged it?

 

[DuncB]

I completely misread your thread as I was on a wobbly bus ride.
I suppose you could purge with the ferment gas with a spunding valve on the top of the dry hopper.
Having previously filled it with the hops.
The more you purge perhaps more aroma loss.
Apologies for pointing you to a non helpful thread.

 

[mac_1103]

I do the fill to full with Starsan and then purge with ferment gas.

OP is asking about purging a dry hopper, not a keg. I don't own one of these things, but the instructions that I've seen in the product descriptions online aren't very detailed or specific - flush with CO2 and pull the PRV.

 

[Bobby_M]

Post a picture or link to the exact hop dropper assembly you're using. The ideal process varies by design.