WÄRTSILÄ PAAE051728, Instruction Manual

Page: 71 / 394

Page
3 (4)
Document No
4V92A0765
Rev
d
Product designation Dosage per 1 m³ of
system capacity Concentration of active corrosion
inhibitor
Corrshield NT 4293
CorrShield NT 4200 10 litres 670 – 1000 ppm as NO
2
Drewgard 4109 16 – 30 litres 640 – 1200 ppm as NO
2
DEWT-NC powder
Drewgard 4109
Liquidewt
Maxigard 3 – 4.5 kg
16 – 30 litres
8 – 12 litres
16 – 30 litres 1500 – 2250 ppm as NO
2
640 – 1200 ppm as NO
2
470 – 700 ppm as NO
2
640 – 1200 ppm as NO
2
Cooltreat 651 5 litres 800 ppm as NO
2
Q8 Corrosion Inhibitor
Long-Life 50 – 100 litres
1.8 – 3.7 Brix°
of active compounds
measured with a supplier’s refractometer
Maricol CW 6 – 9 litres 1000 – 1500 ppm as NO
2
Nalco 39 (L)
Nalcool 2000
Nalfleet EWT 9 - 108 16 - 36 litres
32 - 48 litres
2.25 - 3.4 litres 550 - 1200 ppm as NO
2
1000 - 1500 ppm as NO
2
670 - 1000 ppm as NO
2
Korrostop KV 20 – 25 litres 120 - 150 ppm as Mo
RD11 (RD11M)
RD25 5 kg
50 litres 1250 ppm as NO
2
710 ppm as Mo
Havoline XLi 50 - 100 litres
1.8 – 3.7 Brix°
of active compounds
measured with a supplier’s refractometer
WT Supra 50 - 100 litres
1.8 – 3.7 Brix°
of active compounds
measured with a supplier’s refractometer
Dieselguard NB
Rocor NB Liquid
Cooltreat AL 2.0 - 4.8 kg
9.5 - 24 litres
50 – 100 litres 1000 - 2400 ppm as NO
2
1000 - 2400 ppm as NO
2
1.8 – 3.7 Brix°
of active compounds
measured with a supplier’s refractometer
Vecom CWT Diesel QC-2 6 - 10 litres 1500 – 2500 ppm as NO
2
Note 1: For many products the recommended minimum and maximum limits are listed in the table
above. Since the amount of active corrosion inhibitors, especially nitrites, is decreasing
during the service of engines, the engine manufacturer recommends to start the dosage from
the upper level of indicated range.
Note 2: The nitrite content of nitrite-based cooling water additives tends to decrease in use. The risk
of local corrosion increases substantially when nitrite content goes below the recommended
limit.
Note 3: Cooling water additive manufacturers can indicate the required nitrite content measured
either as sodium nitrite, NaNO
2
or as nitrite, NO
2
. 1 mg/l as NO
2
equals to 1.5 mg/l as
NaNO
2
.