Posted Mon Jul 29, 2013, 7:15pm Subject: Rubber gasket Help from Vacuum Pot Gurus
A long time ago I bought a Silex vacuum brewer off of eBay. All I was able to make with it was a mess. The rubber gasket which is supposed to seal the top glass chamber to the carafe is hard and therefore can't provide a good seal. I'm thinking that is the bulk of my problem. I figured I would deal with it later and stashed it. Today while looking for a stashed group head gasket for my Silvia which is long overdue I found both pieces. I had figured that I would have to make a plaster mold of the Silex gasket and cast a new one using silicon rubber. I may someday have to do that, but looking at it today I find it to be a bit flexible. While the Silvia gasket has never been used it is hard and I installed one from the same vintage about five years ago and it was only marginally satisfactory then. I don't imagine the one which I have has improved in the past five years. The plan is to dump both parts into some hydraulic brake fluid for a few days and see what happens. It did wonders for a rubber mat from my old Rec-O-Kut turntable.
The Silvia part is available and I will get a new one soon when I order a bunch of parts for the Silvia. It is over ten years old is due for restoration and PID installation.
I'm hoping for the best with the brake fluid but it would be comforting to know that I can get a replacement Silex part. The part number on the Silex part is: P-251 A and it has patent number of: 2032317 .
I know folks love these machines. Does someone make the rubber part?
Posted Wed Jul 31, 2013, 12:23pm Subject: Re: Rubber gasket Help from Vacuum Pot Gurus
Thanks. That is exactly what I am looking for. They are a bit more expensive than Silicon Gear ($25 vs. ~$17) but their part is in production. Andy at Silicon Gear did respond to my e-mail and said he would make a mold but there would be a 250 piece minimum. I was going to try to stir up interest but Dayseal is sure less bother. Maybe soon I'll know what the fuss over vacuum brewed coffee is all about.
Posted Wed Jul 31, 2013, 12:34pm Subject: Re: Rubber gasket Help from Vacuum Pot Gurus
I'm pretty sure you are correct as I understand that brake fluid is toxic. I think I can wait for the new Silex gasket to come but Miss Silvia is spurting and squirting so I am desperate there. I know that brake fluid is highly soluble in water so I'll give the Silvia gasket a good rinse before installing it. After the installation I'll do a couple of back flushes. The hope is that any brake fluid which hasn't chemically bonded to the rubber will be removed. I should have paid more attention in my chemistry classes. I wish I knew this stuff better.
Just a word of caution, I would not use brake fluid and food prep equipment in the same sentence, just saying ? :D
quadium Senior Member Joined: 13 Jan 2015 Posts: 1 Location: Oregon Expertise: I like coffee
Posted Tue Jan 13, 2015, 9:23am Subject: Re: Rubber gasket Help from Vacuum Pot Gurus
My Cory gasket wasn't making a reliable seal, no matter how hard I tried to get it seated. My solution, which has worked very reliably, was to remove the seal and wet both the inside and outside surfaces of the seal each time before making coffee. Voila! And the coffee is consistantly great!
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