DESCRIPTION
Zitrec LC
- mixed with the appropriate amount of water - is used as a multipurpose
heat transfer fluid based on mono propylene glycol.
APPLICATION
Many applications
in the industry require a fluid to transport heat or cold. Those
applications range from solar panels or heat pump systems, over cooling or
heating of industrial processes and refrigerants in indirect cooling systems
to artificial ski-tracks or ice rigs. This transport medium is usually
called secondary refrigerant or secondary coolant. The ideal secondary
refrigerant must ensure a good thermal conductivity, have a high specific
heat and low viscosity. It is also important that the secondary refrigerant
is non-flammable and compatible with common engineering materials.
Zitrec LC
provides protection against boiling,
freezing and corrosion. The dilution is determined by system requirements,
mainly freezing requirements. However, to ensure good corrosion protection
it is recommended to use at least 35 vol. % of
Zitrec LC
in the coolant solution, which provides freeze protection to –17°C. For
lower freezing protection it is recommended to use
Zitrec L –15°C.
This ready-to-use solution contains an adjusted corrosion inhibitor package
to ensure optimal corrosion protection.
Mixtures with more than 70 vol. % of
Zitrec LC
in water are not recommended, because the physical properties like heat
transfer are no longer sufficient.
|
Dilution Zitrec L, vol % |
Freeze Point, °C |
Dilution Zitrec L, vol % |
Freeze Point, °C |
|
32.7 |
-15 |
54.4 |
- 40 |
|
43.6 |
-25 |
57.7 |
- 45 |
|
47.7 |
- 30 |
65.6 |
- 55 |
COMPATIBILITY AND MIXABILITY
Zitrec LC
is compatible with most other heat
transfer fluids based on propylene glycol. Exclusive use of
Zitrec LC
is recommended for optimal corrosion protection.
This heat transfer fluid is compatible
with European hard tap waters, up to a water hardness of 30° dH (German
hardness degrees equivalent to 535 mg/l CaCO3).
Chemical and physical properties
|
Properties |
Zitrec LC |
Method |
Properties |
Zitrec LC |
Method |
|
Propylene glycol |
92 % w/w glycol |
Internal |
|
|
|
|
Inhibitor content |
5 % w/w |
internal |
Specific gravity, 20°C |
1.042 typ. |
ASTM D1122 |
|
Water content |
5 % w/w max |
ASTM D1123 |
Equilibrium boiling point |
157°C typ. |
ASTM D1120 |
|
Nitrite, amine, phosphate |
nil |
IC |
pH |
9.1 typ. |
ASTM D1287 |
|
Colour |
light blue-green |
visual |
Refractive Index, 20°C |
1.445 typ. |
ASTM D1218 |
|
Properties |
L –35°C |
L –25°C |
L –15°C |
method |
|
Colour |
light blue-green |
light blue-green |
light blue-green |
visual |
|
pH |
8.8 typ. |
8.8 typ. |
8.7 typ. |
ASTM D1287 |
|
Freeze Point |
- 35°C |
- 25°C |
-15°C |
ASTM D 1177 |
|
Specific gravity, 20°C |
1.041 typ. |
1.037 typ. |
1.029 typ. |
ASTM D1122 |
CORROSION PROTECTION
Zitrec LC
contains an optimized inhibitor package to ensure maximum and long lasting
corrosion protection at both high and low temperature. The inhibitors are
based on carboxylate technology, which guarantees a longer lifetime than
with traditional products.
Anti-corrosion performance is demonstrated through standard and specific corrosion testing.
|
ASTM D1384 |
Weight loss in mg/coupon1 |
|||||
|
Brass |
Copper |
Solder |
Steel |
Cast Iron |
Aluminum |
|
|
‘Industry’ limit (max) |
10 |
10 |
30 |
10 |
10 |
30 |
|
Reference product 2 |
1.0 |
1.5 |
1.25 |
-0.1 |
-0.1 |
-0.9 |
Zitrec LC |
0.6 |
0.9 |
0.7 |
0.2 |
0.1 |
-2.0 |
1
: Weight loss AFTER chemical cleaning. Weight gain is indicated by a -
sign.
2 : Reference product is a mono propylene glycol based product, but with a
traditional inhibitor package
|
Dynamic heat transfer corrosion test (2000 W - 48 hrs) |
Weight loss in mg/coupon1 on Aluminum |
|
Zitrec L-7
2 |
|
|
Zitrec L-30 |
|
|
Zitrec L-40 |
|
|
Reference product -30
3 |
|
1
Weight loss AFTER chemical cleaning. Weight gain is indicated by a - sign.
2
Typical test conditions are 20 vol-%
3
Reference product is a mono propylene glycol based product with a
traditional inhibitor package
STORAGE REQUIREMENTS
The product should be stored at ambient temperatures and periods of exposure
to temperatures above 35°C should be minimized. As with any antifreeze
coolant, the use of galvanized steel is not recommended for pipes or any
other part of the storage/mixing installation.
Zitrec LC
can be stored for minimum 5 years in
unopened containers without any effect on the product quality or
performance. It is strongly recommended to use new containers and not
recycled ones.
TOXICITY & SAFETY
For detailed Toxicity and
Safety Data we refer to the Material Safety Data Sheet. The transport is
not regulated.
All information contained in this Product Information Leaflet is accurate to the best of our knowledge and belief as at the date of issue specified. However, the Company makes no warranty or representation, express or implied, as to the accuracy or completeness of such information.
ZITREC LC
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