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Valsir S.p.a
Waste and water
supply systems, underfloor heating system
and flush cisterns

logo-pexal

The multilayer system of excellence.

Panoramica pexal

Pexal® is composed of multilayer pipes and different types of fittings that are chosen according to the installation technique adopted.

There are various applications: from the distribution of hot and cold drinking water to centralised water supply systems, from radiator and fan heating systems to radiant floor, wall and ceiling heating and cooling systems, from compressed air systems to industrial plants.


The advantages of synthetic materials and metal in one product

sezione-hdpe

Resistance to corrosion

The total resistance to corrosion, to construction materials and the main chemical compounds allow it to be used in a wide variety of applications, both residential and industrial.

Excellent flexibility

The combination of crosslinked polyethylene and aluminium guarantees excellent flexibility when bending (also when bent manually) and dimensional stability in the long term.

Excellent acoustic insulation

The elastic nature of the crosslinked polyethylene allows excellent absorption of vibrations and therefore an excellent acoustic insulation.

Reduced pressure loss

The extremely smooth internal surface, as well as preventing the formation of deposits such as lime scale, ensures reduced pressure loss also with the passage of time.

Guaranteed durability of at least 50 years

The system has a guaranteed durability of at least 50 years in compliance with product standards; in this period the product can be used at pressures of 10 bar and temperatures as high as 95°C.

Wide range

The range of fittings, accessories and relative tools is extremely wide and allows all requirements to be met. The fittings are available both in metal and in technopolymer to cover different system applications.

Barrier against oxygen and light

The butt welded aluminium layer acts as a total barrier against oxygen and light, which in plastic pipes would otherwise favour algae growth and the corrosion of the metal parts that make up the system.

Non-toxic materials

The system is made up of materials that are completely non-toxic and is certified for the transport of consumable fluids and drinking water.

Lower thermal expansion

Thermal expansion is approximately 8 times lower than all-plastic pipes and is similar to the expansion in metal pipes.

Ideal solution in areas subject to earthquakes

It is the ideal solution in areas subject to earthquakes thanks to the excellent mechanical properties such as flexibility and the capacity to alleviate vibrations.

Light in weight

The pipes are extremely light in weight as compared with metal pipes: weight is 1/3 of a similar copper pipe and is 1/10 of a similar steel pipe.

Wide range of diameters

Wide range of diameters from De 14 mm to De 90 mm

Ecosostenibilità pexal

Sustainability

Pexal® and Mixal® are produced with materials that can be completely recycled, which, at the end of their service life can be recovered. The production processes used are energy efficient and are of a low environmental impact; in terms of the environment and conservation of resources, Pexal® and Mixal® are in line with Green Building principles.


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Applications

Pexal® multilayer system is suitable in renovations as well as new buildings such as shopping centres, hospitals, offices, schools, multistorey residential buildings, and industrial plants.

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Thanks to their excellent qualities they can be used in surface mounting for any type of system:

  • supply of high and low temperature water to radiators;
  • supply of hot and refrigerated water to fans;
  • distribution of hot and cold water;
  • radiant floor, wall and ceiling heating and cooling systems;
  • central heating stations;
  • distribution of compressed air;
  • laboratories, technical and industrial plants in general.

Gamma pexal

A solution for all requirements

The range is composed of pipes supplied in straight lengths (up to diameter 90 mm for the Pexal® pipe) and in coils (up to diameter 32 mm) of various lengths, from 50 m up to 200 m.

The Valsir multilayer pipes can also be supplied with a protective corrugated covering, either in red of blue and can be pre-insulated with a flame retardant layer in grey, blue or red.

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Aluminium

There are different methods for the production of multilayer pipes and they differ mainly in the technology used in forming the aluminium pipe. It can be formed by overlapping, overlapping and welding, or by butt connection and welding

The latter is the technology chosen by Valsir in that it guarantees a uniform thickness across the entire circumference, greater resistance to pressure and bending, uniform mechanical characteristics, greater adhesion values with the bonding layers and a total barrier to oxygen.

 

 

Crosslinked polyethylene

The crosslinking process can be performed using different technologies, recognised by International standards and identified as follows: A (peroxides), B (silanes), C (radiation), D (azo-compounds); the method used is indicated together with the abbreviation for the material, thus obtaining PE-Xa, PE-Xb, PE-Xc, PE-Xd.

There is much conflicting information in the market as to which is the best technology; however, it is not the type of crosslinking process that determines the quality of the pipe but the capacity to produce it in compliance with all the relevant quality standards which are applied to all four of the abovementioned crosslinking methods.


Fittings

Metal and techno polymer fittings for all systems requirements

Pexal Brass

Press fittings in brass

Bravopress

Press fittings in techno polymer

Pexal Easy

Full bore fittings in techno polymer

Pexal Twist

Press fittings in techno polymer

Need for repair? The space-saving solution

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The repair joints can be used for repairing a damaged pipe within a space no greater than 20 cm in length, the equivalent of no more than two tiles. The repair joints of the Pexal® Brass product line allow sections of damaged pipe

to be replaced in small spaces thanks to the telescopic system of the joints. In the case of finished surfaces no more than two tiles need to be broken. An essential space-saving solution for limiting the effects of a repair job.


Accessories

A wide range of accessories and special components complete the system in order to meet all system requirements.

Modular manifolds with and without interception valves, coplanar manifolds, manifolds with shut-off valves, in-wall ball valves, fixing plates for sanitary appliances and many other items...

Tools

Reliability, durability and quality are the characteristics that distinguish the range of Valsir tools used in the installation of the Pexal® system; these products were designed to the suggestions of our most trusted plumbers and made with only top quality materials.

Pressing machines up to diameter 90 mm, socketing machines up to diameter 75 mm, pipe cutters, multi-diameters expanders, systems for manual and mechanical bending are just some of the tools that make up and complete the various product lines.


Time and money saving installations

Thanks to their excellent mechanical characteristics the Valsir multilayer pipes can be bent instead of employing fittings thus obtaining significant advantages from an economical point of view.

Fire resistance

The installation of a system must always be performed in compliance with local and national standards and regulations, observing any fire protection provisions in force that may vary from one country to another.

Legionella and treatments

Compared to metal pipes, Valsir multilayer pipes have a greater resistance to chemical compounds and may undergo treatments (eg. superchlorination shock) for several years without being damaged.


Case history

The excellence of the Pexal system installed in great buildings all over the world.

European community Palace

Tirana (Albania)

Peles Castle

Bucarest (Romania)

Purpan Hospital

Tolosa (France)


Certified quality

The range has been certified by the strictest certification bodes.

pexal-qualita

Support

Valsir provides complete support both during the planning phase and on site, thanks to a first-class technical office made up of a team of highly experienced engineers, capable of dealing with the most complex system requirements.

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Silvestro Software

Silvestro is a software program created by Valsir to help planners in the creation of water supply and waste systems. Thanks to its ease of use it allows the Valsir products to be easily adopted in any project.

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