silica gel/rubber VMQ

[Jaktpanda]

Hi all,

I ordered a butterfly valve from Ali but didn't check what the gasket was made out of. Asking the seller I learned it was "silica gel VMQ" which I assume is the same as Silica rubber VMQ. As described on this site it's not recommended for use with steam, but other than that I don't see any counterindicators against ethanol use.

I'd rather not have to manufacture my own seal in PTFE, so I'm trying to find out if this is ok to use as-is in my still, or if I have to switch the material out. I'm awaiting respons from the seller for more info, but thought I'd check you y'all as well.

Any thoughts?

[Chauncey]

If it ain't copper, stainless, boro glass, or ptfe we do not approve. Wrap it in ptfe tape if possible or look for a Teflon replacement

[NormandieStill]

Hi all,

I ordered a butterfly valve from Ali but didn't check what the gasket was made out of. Asking the seller I learned it was "silica gel VMQ" which I assume is the same as Silica rubber VMQ. As described on this site it's not recommended for use with steam, but other than that I don't see any counterindicators against ethanol use.

I'd rather not have to manufacture my own seal in PTFE, so I'm trying to find out if this is ok to use as-is in my still, or if I have to switch the material out. I'm awaiting respons from the seller for more info, but thought I'd check you y'all as well.

Any thoughts?

I have one of those. I used it on the bottom of my mash tun. Having had a look at it, I wouldn't trust it against strong alcohol, especially if it were heated. Ferments should be fine, but low wines and above would be a no-no!

[Jaktpanda]

Alright, thanks for the advice. I'll look at rolling my own since replacement in PTFE aren't available as far as I can see.

Cheers!