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  1. johnv929

    SS to teflon wear question

    Thx, I just realized you were asking about Cl (Chlorine/Chloride) concentration. It is very low to zero, we final rinse with DI water so any residual chlorine from the city water is immediately taken away. We are going to electroless nickel coat the shaft, so I will have nitronic 60, nickel...
  2. johnv929

    SS to teflon wear question

    Well, I decided to follow both of your advice, sort of. The seal engineers recommended that we use nickel coating on the shaft, but said that their food grade seals are virgin teflon, so I don't think there would be a possibility of coating the seal?? They also are reducing the seal loading by...
  3. johnv929

    SS to teflon wear question

    The previous material was 440C, used in a drive pin. It did rust. The wet service is during cleaning and our concentration is about 1% KOH and it is immediately rinsed off. The shaft is 1.5" in diameter.
  4. johnv929

    SS to teflon wear question

    We are installing a teflon rotary seal on a piece of pharmaceutical processing equipment. Preliminary test results showed some wearing of the seal and possibly of the shaft, since there were white and grayish particles being shed after very few revolutions. There also was a noticeable amount...

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