Active Service Life

The percentage of available potassium permanganate and the density of the gas phase media can be correlated to the active service life left in the product. If the media in the absorber is Hydrosil HS-600 or an activated alumina based product, the following schedule can be followed:

Hydrosil HS-600

Percentage of

Potassium Permanganate

(% by weight)

 

Activated Alumina

Percentage of

Potassium Permanganate

(% by weight)

2.2  to  6.0

SAFE

2.6  to  4.0

1.6  to  2.2

BORDERLINE

1.9  to  2.6

1.2  to  1.6

CHANGE

1.4  to  1.9

0.0  to  1.2

CHANGE IMMEDIATELY

0.0  to  1.4

 

 

The comments are intended to mean the following:

SAFE

  • Reanalyze in 90 days

BORDERLINE

  • Change in 30-60 days

CHANGE

  • Change in 30 days, break through could occur quickly under plant “spill” conditions

CHANGE IMMEDIATELY

  • Change Immediately

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