DUROMETER
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Posted by: dmanska ®

11/23/2005, 16:11:15

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Im creating a gasket, probably out of shore A - 30 Silicone. Its a flat disc shape only a few square inches in area and will go under an aluminum lid. How do I know the exact compression amount of the silicone once the lid is tightened? Is there a formula for pressure, durometer level, and distance compressed? Several of these lids will be compressed in series with screws going through all the lids so I need to know this compression distance in order to design the entire assembly. Its complicated, so an answer to the first question will suffice. Thank you.






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Posted by: Jack Anderson ®

11/28/2005, 16:26:07

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Dear Durometer,
It depends on the size of bolts and the torque that is needed for proper tightening of the bolts. Silicone sounds like it might squish out from between plates. I would suggest using copper gasket material, especially when sealing for petroleum products. It is more consistent for squish factoring on plating (between plates) and large flanges. And you may want to use copper washers on the bolts also. If you contact a copper gasket manufacture, they will have the formula that you will need. The manufacturer of the (Shore A- 30 Silicone) I never heard of, will have the formula that you need. I know this doesn’t answer your question, but you may want to rethink your gasket material?






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Re: DUROMETER
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Posted by: randykimball ®
Barney
11/27/2005, 19:48:09

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Can you not simply apply one gasket and torque the clamp device to what you consider the proper compression and measure the distance of compression, then apply the data to the multiplied stack?



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