DREWPLEX® AT boiler water treatment and DREWPLEX OX corrosion inhibitor for Motor Vessels
DREWPLEX AT/DREWPLEX OX Treatment
Initial Dosage: 2.5-5 liters per ton of water in the boiler system
Continuous Dosage: Maintain 40-65 ppm hydrate alkalinity and 10-20 ppm phosphate in the boiler water
DREWPLEX AT Dosage Adjustment
Hydrate Alkalinity is the primary parameter for adjusting DREWPLEX AT Dosage
HYDRATE ALKALINITY HYDRATE ALKALINITY HYDRATE ALKALINITY
<40 ppm 40 - 65 ppm >65 ppm
Increase dosage Dosage adjustment Reduce dosage by
PO4 by 25% and check may be necessary. 10%. Check for
<10ppm for seawater or Check for possible shore water in-leakage.
shore water hardness
or in-leakage. in-leakage.
Increase dosage by Normal condition. Reduce dosage by
PO4 20%. Check No dosage 10%. Check for
10 - condensate for acidic adjustment shore water in-leakage.
20 ppm material in-leakage. necessary.
Increase dosage Dosage adjustment Reduce dosage by
by 10%. Check may be necessary. 25%. Feedwater
condensate for Check for acidic quality may be better
PO4 acidic material material in-leakage. than usual.
>20ppm in-leakage. Alkalinity may be
Make up and/or destroyed by acid
feedwater volume contamination.
may be low or Makeup and/or
quality may be feedwater volume may
better than usual. be low or quality may
be better than usual.
NEUTRALIZED CONDUCTIVITY
in μmhos BLOWDOWN ADJUSTMENT
Up to 700 Satisfactory Normal maintenance blowdown is sufficient.
Regular flash blowdown to remove suspended
solids should be carried out a minimum of
once per week.
Above 700 High Increase frequency of blowdown.
Feedwater DOSAGE ADJUSTMENT
DEHA DREWPLEX OX Continuous Dosage
in ppm Initial Dosage: 0.4 liters/ton of water
in the boiler system
Above 0.8 High Decrease
0.4 - 0.8 Satisfactory No Change
Below 0.4 Low Increase
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DREWPLEX® AT boiler water treatment/AMERZINE® corrosion inhibitor for Motor Vessels
DREWPLEX AT/AMERZINE treatment
Initial Dosage: 2.5-5 liters per ton of water in the boiler system
Continuous Dosage: Maintain 40-65 ppm hydrate alkalinity and 10-20 ppm phosphate in the boiler water
DREWPLEX AT Dosage Adjustment
Hydrate Alkalinity is the primary parameter for adjusting DREWPLEX AT Dosage
HYDRATE ALKALINITY HYDRATE ALKALINITY HYDRATE ALKALINITY
<40 ppm 40 - 65 ppm >65 ppm
Increase dosage Dosage adjustment Reduce dosage by
PO4 by 25% and check may be necessary. 10%. Check for
<10ppm for seawater or Check for possible shore water in-leakage.
shore water hardness
or in-leakage. in-leakage.
Increase dosage by Normal condition. Reduce dosage by
PO4 20%. Check No dosage 10%. Check for
10 - condensate for acidic adjustment shore water in-leakage.
20 ppm material in-leakage. necessary.
Increase dosage Dosage adjustment Reduce dosage by
by 10%.Check may be necessary. 25%. Feedwater
condensate for Check for acidic quality may be better
PO4 acidic material material in-leakage. than usual.
>20ppm in-leakage. Alkalinity may be
Make up and/or destroyed by acid
feedwater volume contamination.
may be low or Makeup and/or
quality may be feedwater volume may
better than usual. be low or quality may
be better than usual.
NEUTRALIZED CONDUCTIVITY
in μmhos BLOWDOWN ADJUSTMENT
Up to 700 Satisfactory Normal maintenance blowdown is sufficient.
Regular flash blowdown to remove suspended
solids should be carried out a minimum of once
per week.
Above 700 High Increase frequency of blowdown.
Boiler Water DOSAGE ADJUSTMENT
Hydrazine AMERZINE Continuous Dosage
in ppm Initial Dosage: 0.15 liters/ton of water
in the boiler system
Above 0.10 High Decrease
0.03 - 0.10 Satisfactory No Change
Below 0.03 Low Increase
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