Thread: hot seals
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Old 04-29-2019, 04:10 PM   #17
ksceviour
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I would not use graphite packing with a stainless steel shaft due to galvanic corrosion issues.

Teflon is the way to go. In the millwright trade packing material was always cut as individual rings on a 45 degree angle and the cuts staggered to prevent blowby. This is generally more of an issue with high pressures like you find on steam turbines, high pressure pumps and the like but it's still good practice.

Another reason to use individual rings is so that if a leak develops you can pull one or two rings and put in new ones to control the leak till later. You can't do that with a single spiral bound piece.
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