Trouble Shooting

1. Low output between regenerations (OBR)
2. Fall in treated water quality
3. Long rinse of units
4. High pressure drop across unit
5. Low flow rate during service
6. Loss of resin from unit
7. Back pressure during regeneration
8. Ejector not working.
9. High sodium slip at SAC outlet
10. High conductivity & pH at anion outlet.
11. High Silica at SBA outlet
12. Low pH at MB outlet.

Complaint – Higher fines content:

Fines content especially in cation resins is reported to be high by the clients. It is a very common and frequent complaint in the new supplies.

The operators of DM plants draw sample from top of the drums and after visual inspection they report that the fines content in the resin, as supplied is very high.

The resin beads can appear to be fines when the above method is employed. The resin beads present at the top of the drum can be half dried and shrunk, because of transit and storage time at the site and hence, it appears as fines.

How to resolve this complaint:

  1. Draw a representative sample of resin and soak the resin in a beaker containing water for nearly an hour. The resin beads will regain their original shape and the beads will be normal in shape.
  2. In case the client is still not convinced, then send the representative sample to our Ankleshwar Q.C. laboratory with a request letter for Fines content analysis.

Note: Reasons for fines not being present in the fresh supply:

  1. The percentage fines passing through 300 microns mesh size is maintained well below the specification limit of 1% maximum, at our factory.
  2. The effective size range as per the earlier specification was 0.4 – 0.5 mm and it has been revised upwards to 0.45 – 0.55 mm since 1999 - 2000. So, the possibility of the presence of higher fines content in the fresh supply is ruled out.