Hi all, I sell PVC additives for a living. I would like to comment on the observed problem. PVC by nature is "afraid" of UV light. PVC becomes brittle and discolored when exposed to alot of sunlight. Usually titanium dioxide, carbon black and/or acrylic type impact modifiers are added to help PVC become more resistant to UV light. When these additives are included there is still some degredation but physical properties are preserved depending of the spec of the finished product. One way to tell if the PVC has degraded is discoloration, colors become faded, losing shininess and changing of color like white to off white or yellowish white. When PVC degrade usually it turns yellowish so for blue pipes it turns alittle greenish. For grey pipes its going to be hard to detect so better buy the white or colored ones if you can. Same thing for valves or any PVC article. Keep it out of the sun or have it covered to make it last longer. Hope this helps.
Ken --- DB <[EMAIL PROTECTED]> wrote: > I did have the same problem with just the handles > breaking, and guess what? > They came from Ace Hardware. The ones I use now have > solid red plastic > handles and they come from home depot..........DB > ----- Original Message ----- > From: "Kenneth Kron" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Monday, January 17, 2005 10:21 PM > Subject: Re: [Biofuel] Appleseed Processor > > > > Interesting, we used PVC valves on our oil lines > and a few other places > > and just chewed right through them. There was one > model that seemed to > > hold up better it had a blade style valve handle > as I recall but we kept > > poping valve handles off all the rest of them. > > > > We were purchasing from ACE Hardware (couldn't > tell who made them), maybe > > your manufacturer has different specs. > > > > kk > <snip> __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo.cgi/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
