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Re: O-Rings
Posted By: SVP Neon Equipment In Response To: O-Rings (Dana)
Date: Wednesday, 31 March 2010, at 12:54 a.m.
> An ebay seller is a good source for Viton
> o-rings - used in a lot of places in my
> vacuum system, they get compressed and need
> to be replaced. A bag of 50 is about $7 with
> free shipping. Just search ebay for size 107
> viton o-rings.If you take them out, wash them in hot soapy water, dry and let them sit for a while they should decompress for the most part. If they do not decompress completely, when you reinstall them flip them around so they are installed opposite of what they were (the side that was facing the glass lip is now facing the other way). I have customers who have used the same O-rings for 12+ years without problem provided they are not cut or otherwise damaged. The O-rings on my manifold system are older than that.
As for where to buy them, they are available from SVP, but I have always been open with people and have told them to look in their local yellow pages for a gasket and seal distributor or a bearing distributor, both of whom will either have them in stock or can order whatever sizes you need. For a quantity of 50 of size 2-107 (what we call a #7) you should be able to get a similar price as the eBay price. For other sizes, check out my website at:
http://www.svpneon.com/o-ring_Size.html
If the size or sizes that you need are not listed take the old O-rings with you and the distributor can size them so you know what you need. Be sure to get Viton material, either 70 or 75 durometer (how hard or soft it is). A lower number is too soft and a higher number is too hard.
Mark
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