Hello
Hello
(OP)
Can anybody tell me what silicon free butterfly valve means?
free silicon means:
no silicon content in rubber seat?
no silicon in paint?
no silicon in grease?
no silicon in the metal?
I heard that silicon free butterfly valve should be used in Auto industry? What is the reason?
Thanks
free silicon means:
no silicon content in rubber seat?
no silicon in paint?
no silicon in grease?
no silicon in the metal?
I heard that silicon free butterfly valve should be used in Auto industry? What is the reason?
Thanks





RE: Hello
David
RE: Hello
RE: Hello
RE: Hello
The auto industry may have concerns about silicone rubber (poly-siloxane) which has poor rating on hydrocarbon exposure (aromatic and aliphatic), and only fair rating on oil and gasoline exposure.
The silicone rubber has good properties for resisting water absorption, and for electrical insulation, but that may not be important for valve peformance to them.
Nitrile / Buna-N rubber valve seat probably is acceptable to auto industry.
RE: Hello
I know, making assumptions is dangerous, but I assumed these things were related. Draw your own conclusions.
RE: Hello
RE: Hello
TenPenny is correct. Normally Silicone free means that there is no Silicone lubricants used in the assembly of the product. Even the smallest amount of Silicone can ruin a lot of paint or photographic film. On paint, it can prevent adhesion and causes a defect called "fish eyes".
You will see the requirement for "Silicone Free" applied not only to the valve, but sometimes to the plant the product is manufactured in. It is that big of a problem.
There are tests you can do to verify your cleaning procedures are effective. In many cases, the end user will test the product again before they let it into their factory.
bcd
RE: Hello
Roy