In the previous article, I already told you
about the marking of fittings made of polypropylene. Today I will make a brief
analysis of the market of this product in Ukraine.
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| Fittings from PPR |
It is important to
start from talking about the materials from which the fittings are made. To do
this, the best option is male with an external thread. Since it in itself
combines two basic materials - polymer and metal. As a plastic, in most cases a
random polypropylene copolymer of the third type PPR is used. As for cheaper
products, other components (for example, chalk) can be added to the primary and
secondary polymer, which impair the properties of the plastic. Accordingly, higher-quality
plants use only primary raw materials in granules.
If you study the issue
of hydraulics, you can see that the first positions are occupied by the brands
Dizayn, Valtec and Fado. Since they have a larger cross-sectional size than
other manufacturers.
An important factor in
the installation may be the overall dimensions of the fitting. If the space is
limited in size, then naturally large items may not be suitable in this case.
The most ergonomic unions are in the range of companies SPK, Valtec and
ASG-Plast.
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| Couplings with external thread. From left to right: SPK, Valtec and ASG-Plast |
As in many aspects of
comparing other products, weight also plays a significant role. But here it is
necessary to divide the concept into the total weight and weight of the
embedded part. Not in all cases the biggest weight of the fitting means that it
will have the most massive mortgage element.
Among the 15 samples of
different manufacturers, the following brands - Blue Ocean, Ekoplastik and Fado
- have the largest weight of the mortgage element.
But in addition to
weight, other factors are also important.
Functionally embedded
part acts as a guarantor of reliability and safety. Its design is developed to
ensure that it has protection against pulling out of the polymer body of the
fitting. And also resisted scrolling. The latter is possible during
installation when the coupling is heated. As a rule, to protect against
scrolling in the design, the prongs on the back of the element are provided.
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| Embedded parts of fitting |
Ring-shaped
longitudinal grooves also provide protection against tearing. In them
polypropylene comes into production. The more of them, the better the grip.
Another solution to
protect against tearing is to perform an internal shutter. The construction is
a shoulder, protruding into the middle of the embedded part. It also improves
the grip on the fitting body.
The maximum number of
teeth (6 pcs.) and the shutter are couplings of the following brands: Tebo,
Febo, Ekoplastik and Blue ocean.
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| Embedded elements of polypropylene fittings. From left to right: TEBO, Blue Ocean, Wavin Ekoplastik, FADO |
The material of the
embedded element plays a role. The brass of CW617N brand proved to be the best.
A cheaper option is steel. But this material has a short service life in heating
and water supply systems.
A significant point in
the installation is the presence of a notch on the thread. It improves the
adhesion of sealants to the body of the fitting. It does not have only a small
part of the couplings.
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| Coupling with male thread. TM Blue Ocean |
The main load during
operation is the thread of the embedded part. Because of its thickness is of
great importance. Leaders on this indicator are practically the same: Тebo, Fado, Ekoplastik, Blue ocean and
VS-Plast.
Among the interesting
features, you can also recall special marks on the TM Tebo fittings. The
fitting of this manufacturer is issued with the index of the depth of the
welding
The belt is intended for connecting polypropylene pipes by the diffusion
coupling method. The pipe enters the socket of the part (angle, coupling, tee,
etc.) to the depth of the welding mark. To fix the depth of the pipe insertion
into the connector, a mark is placed on it. In this case, the installer must
constantly keep in mind information about the depth of the welding belt for
different diameters and draw a marker. Plus, you need a ruler or roulette. If
there is an index of the depth of the welding belt, the person performing the
installation only applies a pipe to the fitting and, according to a special
notch, leaves a mark. This at times reduces the complexity and time of
installation. |
| The angle is 45 degrees from polypropylene. ТМ ТЕВО |
Summing up, I can say
that the most preferable option for buying ppr-fittings in Ukraine is the
following TM: Tebo, Fado, Ekoplastik, Blue ocean and Valtec.
A full analysis of the fittings can be obtained by leaving a comment at
the bottom of the article.
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