Hydrocarbon refrigerants are considered around the World to be superb professional
refrigeration products and are widely used outside of North America in a full
range of applications and systems. RED TEK® 12a is a highly refined Alkane
/ Hydrocarbon product, formulated and blended to replace R12 substitutes in existing
installations with few, if any, modifications to an existing system. RED TEK®
12a has also been designed to replace over the next few years, the current OEM-
R134a factory fill product.
QUALITY & PERFORMANCE:
RED TEK® 12a as indicated and classified as a HC, is a highly refined product
with a boiling point of -34.7 degrees C, at atmospheric pressure, and designed,
to be as close to the operating performance of R12 systems, but also in new systems
as a direct replacement for R134a.
The density of RED TEK® 12a is significantly lower than R12. This, combined
with the higher latent heat and thermal conductivity, has the desirable effects
of reducing the weight of refrigerant required to extract a specified amount of
heat. In practice, the required weight of RED TEK® 12a needed to give the
same refrigeration capacity and performance as R12 or R134a, is 35% and 40% respectively.
Significantly less by weight than either traditional products.
Although RED TEK® 12a is developed to give similar operating conditions
and capacities as R12 and R134a, this product is an Alkane /Hydrocarbon and comes
from the same hydrocarbon family as propane and butane. It is extremely important
to know that; Commercial propane and butane must not be used in
an air conditioning or refrigeration system. These fuel grade products contain
high volatility and variable compositions and impurities. This will significantly
reduce the reliability and performance, leading to premature failure and would
- Systems operating at different pressures and temperatures outside their capabilities,
which will be detrimental to the system component performance and reliability.
- Significantly lowers capacities and efficiencies will be noticed immediately.
Red Tek® 12a is a natural formulation of environmentally friendly Alkane
products. They have a very short atmospheric lifetime-weeks and months vs 100's
of years for CFC-R12. Once released into the atmosphere RED TEK® 12a breaks
down into carbon dioxide and water. Although carbon dioxide is a greenhouse gas,
it is a very weak one. The significant effect of carbon dioxide on global warming
is due to very large quantities released through burning fossil fuels for power
generation. The amount released by the use of Alkane / Hydrocarbon refrigerants
would be an extremely low proportion of the overall global total.
RED TEK® 12a contains no chlorine or bromine and therefore has "NO"
ozone depletion potential. Its global warming potential is related to the
carbon dioxide produced when it breaks down in the atmosphere. When compared to
R12 or R134a in the following "Greenpeace International" comparison
table, the amount of carbon dioxide is insignificant.
||RED TEK® 12a
potential (100 year basis)
RED TEK® 12a is considered one of the most environmentally friendly refrigerants
available in the marketplace.
Alkane / Hydrocarbon refrigerants are extremely efficient and effective. RED
TEK® 12a has been formulated and blended to give similar capacities as R12
and R134a, making it simple to use in existing R12 and R134a systems.
Many of the New Alternative refrigerants such as RED TEK® 12a are zeotropic
blends, in other words, RED TEK® 12a does not behave like a single substance.
This introduces some differences in application and use. In application terms,
this mainly concerns temperature glide in evaporators and condensers.
RED TEK® 12a has been designed, formulated and blended to operate with
similar system pressures as R12.
At evaporating conditions in the system, the pressure of RED TEK® 12a will be
slightly higher than either R12 or R134a, and in condensing conditions, the pressure
of RED TEK® 12a will be lower. RED TEK® 12a will therefore operate with a lower
compression ratio, thus improving the operational characteristics of the compressor
by significantly lowering high side compressor pressures.
The discharge temperature of RED TEK® 12a is similar to R12 and R134a at
the same evaporating and condensing temperatures.
As with zeotropic formulations, RED TEK® 12a has a temperature glide. When
reviewing the RED TEK® pressure / temperature charts, you will see the two temperatures
(the bubble temperature and dew temperature) correspond to each pressure. The
bubble temperature is the saturated liquid temperature (the temperature of the
refrigerant when it is pure liquid, but not subcooled) and the dew temperature
is the saturated vapor temperature (the temperature of the refrigerant when it
is pure vapor, but not superheated).
When a refrigerant boils, the composition of the vapor may not be the same
as the liquid. The vapour could be richer in the component with the lower boiling
At the inlet of the evaporator, the temperature of the refrigerant will be
higher than the bubble point because some of the refrigerant will already have
flashed off during expansion.
As the refrigerant flows through the evaporator, its boiling point rises as
the composition of the liquid phase changes. The evaporating temperature will
therefore increase as the refrigerant flows through the evaporator and more of
the refrigerant evaporates.
This is known as the temperature glide. In practice it will not be
as much as indicated by the difference in the bubble and dew temperatures on the
charts, and is in the line with other refrigerant blends currently available throughout
The same effect occurs in the condenser. In this case, the condensing temperature
will decrease through the condenser. There are other effects regarding temperature
glide which apply to all zeotopic blends.
- Build up on evaporator may be uneven due to the change in evaporating temperature
through the evaporator.
- Where a thermostatic expansion valve is used, slight adjustments will ensure
the refrigerant is superheated vapor when it leaves the evaporator.
- The composition of the blend may be different in the vapor state. The refrigerant
should therefore always be charged as a liquid through the low side service fitting.
RED TEK® 12a has a lower density (but higher latent heat per unit weight
and better thermal conductivity) than R12. In practice this means the charge required
in weight terms, is lower than for R12 and R134a to give the same volumetric flow
rate and the same capacity.
The charge for RED TEK® 12a is 35% of that required for R12 by weight,
and 40% of that required for R134a by weight. Significantly less product is used
to complete the same function.
RED TEK® 12a is compatible will R12 or R134a systems including:
- Metal components.
- Mineral and Synthetic (Ester and PAG) lubricants.
- Compressor motor materials
- Seals, gaskets and o-ring materials.
Note: RED TEK® Refrigerants and R 12 Mineral Oil are not compatible
with Butyl Rubber Hoses.
HEALTH & SAFETY:
Material Safety Data Sheets are available and provided on all RED TEK® refrigerants.
There is no occupational exposure limit (OEL) for hydrocarbon refrigerants and
therefore none for RED TEK® 12a.
- HC's are considered flammable gases, in concentrations of 1.9% and 8.5% of
amount of air volume contained in a sealed or enclosed space.
Due to the smaller amounts of Alkane refrigerants required in an air conditioning
system, this is not a relevant issue and has been addressed through a number of
extensive liability risk assessments carried out on these products. It is important
to know, that outside of the North American marketplace, Hydrocarbon refrigerants
make up approximately 50% of the refrigerant used throughout the World. And, as
of this date, there has not been one recorded incident anywhere on the Globe,
in the past century, where Alkane / Hydrocarbon refrigerants have caused or been
involved in a fire or explosion in mobile or stationary air conditioning systems.
- Contact with liquid refrigerant will cause freeze burn (similar to frost bite),
which should be treated by washing the area with cold or tepid water. Medical
attention may be necessary.
- RED TEK® 12a is heavier than air and will therefore tend to collect in
basements, well type display cases / chest freezers. Such areas should be ventilated
to disperse vapor.
FOR ADDITIONAL INFORMATION ON RED TEK® REFRIGERANTS OR OTHER RED TEK® PRODUCTS
Thermofluid Technologies, Inc.,
3031 Topside Business Park Dr., Louisville, TN USA 37777
Tel: 1-888-676-9380 Fax: 865-983-0068