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Coolant Filtration

Coolant Hose & SCA/SCA+ Chemical Differences

Coolant Hose - 3 & 4 Ply
SCA/SCA+ Chemical Differences COOLANT FILTRATION
Designed to withstand extremes in operating
temperatures ranging from -65ºF to 350ºF What are the SCA chemicals and how do they do
(-54ºC to 177ºC). their job?

3-ply hose 3 ft./0.91m lengths Nitrite is the key chemical component in SCA cooling
system treatment. Nitrite provides protection against
3-ply hose is reinforced cavitation, erosion, and it inhibits corrosion. Nitrate also
with three layers of provides corrosion protection to aluminum and solder.
polyester fabric and
coated with a unique Borate functions as an alkaline buffer to prevent acidity and
silicone elastomer. controls pH.
Size (inner dia.) Part Nominal O.D. Recommended Clamp MBT (Mercaptabenzothiazole) provides a plating effect
in mm No. in mm Lined Constant on all copper and copper alloys, protecting them from
Torque direct contact with coolant and oxygen, and subsequent
0.63 16 P171371 0.95 24 P532921 N/A corrosion.
0.75 19 P171372 1.08 27 P532923 N/A
0.88 22 P171373 1.20 30 P532923 N/A Silicate reduces corrosion of ferrous metals and is an
effective aluminum corrosion inhibitor.
1.00 25 P171374 1.33 34 P532923 N/A
1.13 29 P171375 1.45 37 P532924 N/A
1.25 32 P171376 1.90 48 P532924 N/A
1.38 35 P171377 1.70 43 P115200 N/A SCA may be substituted for DCA2 and BTE
1.50 38 P171378 1.83 46 P115200 N/A
1.63 41 P171379 1.95 50 P115200 N/A SCA+ may be substituted for DCA4 and BTA Plus
1.75 44 P171380 2.08 53 P115200 N/A
2.00 51 P171381 2.33 59 P115200 P532925
2.25 57 P171382 2.58 66 P115201 P532925
2.38 60 P171383 2.70 69 P115201 P532925
2.50 64 P171384 2.83 72 P115201 P532925 While the chemical composition of SCA+ Cooling
2.63 67 P171385 2.95 75 P143422 P532925 System Treatment features some of the same
2.75 70 P171386 3.08 78 P143422 P532926 chemicals, there are differences.
3.00 76 P171387 3.33 85 P143422 P532926
3.50 89 P171388 4.83 123 P115202 P532927 Molybdate and Nitrite are combined to provide cavitation
4.00 102 P171389 4.33 110 P115203 P532928 erosion protection and inhibit corrosion.

4-ply hose 3 ft./0.91m lengths Silicate reduces corrosion of ferrous metals and is an
affective aluminum corrosion inhibitor. Phosphate
4-ply hose is reinforced functions as an alkaline buffer to prevent acidity and
with an added layer of controls pH.
polyester fabric and
provides even greater Donaldson SCAs combat a whole series of coolant system
resistance to abrasion problems including, rust, scale from minerals, acidity from
antifreeze, the intrusion of air fuel and oil to coolant, pitting
and rubbing. of engine parts from cavitation, foaming from coolant
aeration and silicate drop-out from over-concentration.
Size (inner dia.) Part Nominal O.D. Recommended Clamp
in mm No. in mm Lined Constant
Torque
1.00 25 P171390 1.40 36 P532924 N/A
1.50 38 P171391 1.90 48 P115200 N/A
2.00 51 P171392 2.40 61 P115201 P532925
2.25 57 P171393 2.65 67 P115201 P532925
2.50 64 P171394 2.89 73 P115201 P532925
2.75 70 P171395 3.15 80 P143422 P532926

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