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HNBR Verses NBR

HNBR Verses NBR

HNBR Verses NBR

(OP)
What is the application difference between NBR and HNBR knife gate valve seats?
Is NBR suitable for Bitumen Froth application between -42 to 100 °C?

RE: HNBR Verses NBR

HNBR ( Highly Saturated Nitrile ) has better wear and abrasion resistance than standard NBR (Nitrile Rubber).  It also exhibits improved heat aging in the 300 F range Vs standard Nitrile, 250 F.  Low temperature range is - 40 F for both materials.  Both have similar chemical compatibility but I do not have any information handy for Bitumen Froth.  You should check a Compass Fluid Compatibility guide or check the MSDS sheet, they sometimes include recommended elastomers. I will post the compatibility at a later date if I can find it.

RE: HNBR Verses NBR

You mentioned a "Compass Fluid Compatibility guide".  Can you suggest a source for same?

RE: HNBR Verses NBR

You can find the guide at compasspublications.com
The guides are usally pretty expensive but worth the price.

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