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By pexpipeman, 02/18/2011

The radiant heat is being widely used to promote various heating systems for both residential as well as commercial sectors. The idea of generating the radiant heat seems easy however getting a heat system that uniformly distributes heat is tough. PEX heat transfer plates are one of the best ways to promote radiant heat systems.

How do the PEX heat transfer plates work?

These heat transfer plates work efficiently by distributing the radiant heat from the various PEX tubing, piping and valves. These heat transfer plates are available in variety of shapes and sizes to suit the requirement of the users.

Due to the molecular structure of the PEX the heat transfer is uniform because these are cross linked and thus offer a laminar flow. The PEX heat transfer plates are available in single and double width. Depending upon the thickness of these plates they can deliver a wide range of heat over a large area and that also for a longer duration. Another feature that decides the amount and rate of heat transfer is the design. The amount of heat transfer will depend on the shape and the heat would be delivered in the units of BTU per hour.

The use of these PEX heat transfer plates is that they can work in extreme weather conditions, both hot and cold. They do not get brittle at the temperatures below freezing point. Their cross linking nature makes them highly bendy so they can be easily molded and laid down in various subfloors, snowmelt systems and other radiant heat systems.

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By pexpipeman, 01/20/2011

PEX tubing have a capacity of 25-30% higher than that of steel due to smooth inner surface and the lack of domestic deposits. Inner diameter steel pipe decreases with time due to corrosion fouling. Same diameter polyethylene pipe increases during operation without loss of efficiency due to the phenomenon typical of polyethylene creep. This increase is about 1.5% over the first 10 years and about 3% over the life of the pipeline. Consequently, the inner surface of polyethylene pipe with time becomes more soft and smooth, which improves the flow wall polyethylene pipe and reduces the resistance to movement.

The advantages of PEX pipe also include reliability, durability and low maintenance. The service life of steel underground piping is no more than 25 years. Whereas the life of PEX pipes – at least 50 years. For polyethylene pipe is not needed electrochemical protection, which creates additional savings in the construction and operation of the pipeline. These tubes can be operated at temperatures ranging from -50 ° C to + 60 ° C.

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By pexpipeman, 01/20/2011

PEX tubing are characterized by complete absence of corrosion. Unlike steel, chemical and physical properties of PEX tubing ensure tightness and resistance to weight loss under the influence of corrosive substances (acids, alkalis, etc.) in the soil and transported to the environment during the entire period of operation. PEX tubing are resistant to degradation from atmospheric conditions.

PEX tubing are plastic, the bending radius of tubes – at least 10 outer diameters. Therefore, when installation of piping requires fewer fittings, it simplifies the design and construction of the pipeline. PEX tubing in 3,5-4 times lighter steel equivalent, well and securely welded at the factory and field conditions. For welding of PEX tubing do not need heavy equipment, lower power consumption (or fuel) compared to the welded steel pipes. The use of long tubes in coils reduce the number of welds is 15-20 times. All this greatly speeds up the construction of PEX pipe and reduces the cost of installation.

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By pexpipeman, 01/10/2011

PEX pipe

1. Cost of PE pipes is cheaper steel.
2. PEX is durable, guaranteed service life – 50 years.
3. Low thermal conductivity – reduces heat loss and reduce condensation on the outer surface of the pipe.
4. Low probability of failure in the pipeline freezing, as this does not occur and the destruction of polyethylene pipe increases in diameter, acquiring the former size when defrosting liquid.
5. Lightweight – easy assembly work, especially in cramped conditions.
6. Construction and reconstruction of water supply and gas supply using PEX tubing saves up to 40% of funds spent compared to traditional methods.
7. PE pipes have high corrosion and chemical resistance, is not afraid of contact with aggressive media.
8. Welds and connections are secure during the entire lifetime.
9. Butt welding is much cheaper, easier and takes less time.
10. PEX can be stretched without losing their quality.
PEX tubing in 5 – 7 times lighter than steel, therefore:
1. Small movements of pipes during installation does not require the lifting mechanisms.
2. One vehicle carries a 5 – 7 times more than polyethylene tubes than steel.
3. PEX facilitate assembly work, especially in cramped conditions.
In addition:
PEX tubing – a reliable shield against the microorganisms and bacteria of the inner layer does not give any water contaminants.

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By pexpipeman, 01/10/2011

For the pipeline in recent years using PEX tubing as they are characterized by high resistance to tearing. They are plastic, do not freeze, can not be exposed to chemicals and stray currents. PEX pipe can not be damaged by galvanic corrosion does not require insulation or extra protection, even if they are in the ground. These tubes are several times more durable than steel, and work with them twice as easy.

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By pexpipeman, 01/10/2011

300ft roll of 1/2″ PEX Tubing with Oxygen Barrier for use in radiant heating applications.

Increased attention to the PEX pipe, PEX tubing , PEX technical due to the fact that in recent years utilities mega-cities of different countries are increasingly focused on the use of trenchless technology promising recovery (rehabilitation) and the laying of water supply and plumbing tubing system. In this vein, using polyethylene (PEX) pipe, tube technology on Monday meet these challenges. It comes to technology gaskets, replacement, repair, and defect detection in pipes underground utilities for different purposes with minimal disturbance of the ground surface. In the best foreign practice, is now 90% of the amount of work to replace and restore sections of pipes in the underground communications made using trenchless technology.

Meets/exceeds ASTM F876/877, CSA B137.5, DIN 4726 standards.

Certified for use in radiant floor heating applications. UPC listed by IAPMO.

PPI pressure rated at: 79psi @ 200F, 100psi @ 180F, 160psi @ 73F

Packing: Box.

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By pexpipeman, 11/19/2010

PEX pipe is an inventive product that has widely spread in the market for cold and hot water plumbing systems. PEX is the short form of cross linked polythene polymer. PEX is the result of the process in which links are formed between molecules of polyethylene and thus given the name of the cross linked polyethylene. Thus the stuff formed is extremely durable that can withstand with high temperature.

A PEX pipe was developed in early 1960’s in Europe. Initially it was called VPE ( polyethylene) but now days it is known as PEX. In 1980’s PEX was introduced into the market of United States. PEX is constructed from highly cross linked HDPE (high density polyethylene) polymer. The HDPE is melted and constantly extruded into the tube.

This PEX pipe has several benefits over conventional plumbing system. It is highly flexible, can be allowed to bend at the angle of 90 degree without the need for elbows and joint fittings. Less connections and fittings means lower risk of leaks and have greater retort for hot water. It is very simple and easy to install and thus results in inexpensive labor. This pipe is energy efficient than other conventional pipes like metal or rigid plastic pipes.

It is highly durable and flexible plastic because it can contract and expand easily with varying temperatures. This durability and flexibility makes it very resistant to latent bursting and also in the event of the freezing. As it has very few connections and joints, thus provides low resistance to the flow of the water in it. These pipes require very petite maintenance. There is no worry for pitting and the corrosion of the pipe as it is made up of flexible plastic. Pex pipe can be stored on spools and can be shipped at lower costs.

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By pexpipeman, 11/02/2010

Pipe RAUTHERM-S is made of polyethylene PEX sewn peroxides. Due to water-insoluble layer Ebal (from PVC) pipe is protected from diffusion of oxygen to the coolant, which is required by German regulations D1N 4726. Made the following assortment of pipes: 14h1, 5; 17h2, 0 20×2, 0; 25h2, 3, 32h2, 9 Where: The first figure – the outer diameter, the second figure – the thickness of the pipe wall.

Properties of pipe material RAUTHERM-S: Fracture; form stability; the optimal ratio of flexibility and can withstand pressure resistance to aging at elevated temperatures, high impact resistance and toughness at temperatures up to-500C, high abrasion resistance and notch, with peregibanii pipe material does not break , high elasticity, high resistance to chemicals; heat resistance, durability, low pressure drop, corrosion resistance, lack of scale, even after many years of service.

Pipes RAUTHERM-S – are the products, tested in practice, many hundreds of millions of meters.
Connection technology with a movable sleeve

Connection to the mobile company Rehau sleeve is one-piece, ie, according to German norm DIN 18380 (VOB), it can plug the plaster and screed without device audit hatches. The basis of the technique of connection is the so-called “memory effect” is to try to take its original shape when extending pipe RAUTHERM S. PE-Xa pipe expands to the cold, put on fitting, and then pressed movable sleeve. Connection technology for mobile pocket involves the use only of the fittings and pipes RAUTHERM S 17×2, 0 mm, 20×2, 0 mm, 25h2, 3 mm, 32×2, 9 mm. Installation may only be a special tool from Rehau.

Connection method on a moving pocket provides the following benefits:

* Permanently attached to tubes of cross-linked polyethylene;
* The ability to control the optical density and a willingness compounds;
* Live-section compared with a known compound with nut and split ring. On this basis, no additional pressure loss in the PEX fitting;
* Since the installation of a movable sleeve can be used trim piping, no waste material;
* There is no need to optimize the lengths of pipe

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By pexpipeman, 11/02/2010

Description Rehau PEX pipe

PEX is produced by crosslinking polyethylene (PE). Feedstock is a high molecular high density polyethylene with linear structure and high durability. For this reason, the very source material has high impact strength and toughness.

REHAU PEX pipe

Сross-linked polyethylene pipe are characterized by the following properties:

* Corrosion resistance. Lack of surface corrosion and cracking in tension;
* No deposits. Pipe material PEX does not contribute to the formation on the surface of solid deposits, ie does not cause fouling of pipes salts and scale;
* Poor conduction of sound. The velocity of sound is much less compared with metal pipes;
* Possess a shape memory. This effect is extremely important when connecting pipes, when laminated tube through a small period of time begins to recover its original shape it tightly fitting covers before sliding a sliding sleeve, thereby increasing strength. In addition, bent at an angle pipe can return to its original state after a while if it is not pre-fix;
* Low thermal conductivity. Helps keep the coolant during transportation;
* Pipe diameter 32 mm bend without the use of special tools;
* Resistance to high temperature and pressure;
* High resistance to abrasion;
* Very high impact strength even at low temperatures;
* Toxicological and physiological safety;
* Low roughness coefficient 0.007 mm;
* Lightweight;
* Quick and easy permanent connection by cold pressing;
* The service life of more than 50 years.

There are several varieties of cross-linked polyethylene:

* Polyethylene, crosslinked by the peroxide method – PE-Xa. He has a very high degree of cross-linking – 85% and shape memory effect;
* Polyethylene, cross-linked by silane method – PE-Xb has the lowest degree of cross-linking – 65%. Stitching uneven thickness of the material. PE-Xb tighter compared with PE-Xa, which makes installation and useability. The shape memory effect is less pronounced, which makes the pipe less resistant to mechanical stress;
* In physically cross-linked polyethylene PE-Xc, obtained by irradiation of hard X-rays and low degree of cross-linking – 70%. This rigid material that limits the scope of its application. The shape memory effect is less pronounced, which makes the pipe less resistant to mechanical stress.

Pipes made of polyethylene PE-Xa, produced with the help of a peroxide cross-linking – 85%, compare favorably with characteristics of pipes made of other materials and meet all modern requirements and standards and water supply systems.

The main group consists of pipes used for the installation of hot and cold water, heating and sanitation. A brief description of such pipes is available on this page.

Separate groups are REHAU pipes for pneumatic systems and heating mains.

For the installation of pipes from REHAU specially made:

* Fittings,
* Collectors
* Installation tools and replacement components to it.

The use of REHAU guarantees the highest quality and reliability, cost effectiveness and efficiency, and as a consequence, a new level of construction quality.

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By pexpipeman, 10/05/2010

PEX Manifolds w/ valve spin closed is a plumbing device which is used to branch out trunk lines. Pex manifold is a copper device with a single inlet and many outlets to a side. A one inch inlet is branched into 3/4 “outlets which are an exact match for the PEX pipes.   It has valves with handles which can be turned a quarter to close or open. The flow of water can be stopped by shutting off the valve. The valve has a ball structure like structure which has a hole right through the center.   When the hole is aligned with the pipes wall it allows the flow. The handle when turned in the opposite direction it stops the water from flowing.  The closing and the opening of the valve is not automated and has to be done physically.

PEX manifolds w/ valve spin closed is used in floor heating systems. The water which comes out of the boiler is diverted to all the rooms in the house or an office building with the help of a manifold. Once again it is branched in the room to send water through many pipes to heat up the floor. The use of PEX manifold w/spin valve has any advantages because one has a choice to allow or disallow water through the pipes. Water can be stopped to a part of the house or even a room without disturbing supply to the rest of the house.   The facility helps in shutting down the supply to unwanted rooms and reduces the electricity bill. The outlets can be clearly marked to see which one goes where.

The PEX manifold w/ spin closed is connected to the pex pipes for the purpose of floor heating.  The pipes too are good at retaining heat which is helpful to reduce the bills. Manifolds with four, five and six outlets are found. The distance between two outlets is two inches.   They come with adjustable brackets to hold the manifold in place.

PEX manifold spin closed comes with a 3 /4 “crimp style inlet and 1/2 “outlet and one end of the manifold is closed. It has to be used at the end of a line as it can not continue the trunk line.  The popularity of the pex manifold w/ spin closed is easy to install and highly durable.  They also need very few fixtures for installations which makes it all the more desirable.

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By pexpipeman, 09/20/2010

One may probably wonder why one will want to make a shift from the galvanized pipe to the PEX plumbing tubes. Well, probably the answer lies within a clogging in the pipes of your house. The reason why pipes get galvanized is because the coating in the galvanized area provides a certain protection of the metal from rust. The question still remains on how long this coating does last. More often than not we do come across some form of corrosion in the pipes, an evidence that these galvanized pipes do not quite last as long as they should. Besides, some form of calcium starts building over inner surfaces of pipes, due to zinc galvanization, and causes clogging up of the pipe, making the whole system ineffective. Another reason why it is disadvantageous to use galvanized piping over PEX pipes is that they form certain types of corrosion with copper, if the union is not dielectric.

Probably change your system from what is in use to another form can be given a thought. Some of the steps that will be required to take are included below.

Step 1: Make sure the entire all the water is thoroughly drained. This can only be done through your building’s main supply in order to do this. Shut off all the water since it will definitely interfere with the replacement process.

Step 2: Remove the galvanized pipes that need replacement. This can be done by the use of hacksaws, tube cutters and band saws, according to the type of binding that was done on them.

Step 3: There is a threading transition that needs to be installed before fixing the PEX plumbing pipes. These transitions are those that make it possible to combine these two materials into to form one system. Depending on the PEX pipe used and its size, dielectric union should be necessary at this stage.

Step 4: Now it’s all systems go and able to connect the PEX plumbing tube with the fitting that you have provided. On doing this, make sure that accuracy is preserved. This is because it is quite a soft material, despite its durability and its tough plastic nature.

Step 5: Test application to your replacement is necessary, in order to verify whether the replacement does not leave any leaks. The pressure test is most accurate and will give us the best indicator.

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By pexpipeman, 08/27/2010

Sale of pipes made of plastic is even a 40th of the 20 th century. Today, plastic pipes are widely used in many fields of industry, agriculture and construction. The advantages of plastic pipes is difficult to overestimate. Since then, as sales of polyethylene pipes has become widespread, they replace many of the pipes of other materials, previously installed. At present, sells tubes of plastic in a very wide range and with a variety of useful properties.

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By pexpipeman, 08/26/2010

Traditional materials, which are still used along with plastic pipes, such as iron, steel, concrete and others, largely inferior to the latter, although made of very durable material.

The main disadvantage of the use of metal tubes is that they are too prone to corrosion. Moreover, metal pipes, as a rule, have a worthless property accrete on its inner surface. In contrast, plastic pipe can last a very long time without the formation of a plaque on the inner surface.

That is why many of the steel pipes that are installed in pipelines must be changed often enough, because they literally attract all the pollution. Overgrowing pipes in this case may lead to a significant reduction in their cross-section. As a result, this may be a need for additional energy consumption for pumping water. For this reason, sales of steel pipes has been reduced considerably, and their production also decreased.

The undeniable benefits that PEX pipes have long been proved: the reduction of time on their pad and a significant reduction of negative environmental impacts. Sale of pipes made of polyethylene are also more profitable from an economic point of view. Plastic pipe, including PEX pipes, not only contain cheaper materials, but they are also much more convenient and less expensive to mount and replace with new ones. Sale of pipes made of polyethylene are also more profitable because of the significant increase in the life of products.

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By pexpipeman, 06/27/2010

By the application of Taco valves are divided into the following categories:

* Construction of hospitals and general-purpose mass-produced in large quantities and is designed for environments with frequently used values of pressure and temperature. These fittings are equipped with water PEX pipe, steam PEX pipe, municipal pipelines,PEX radiant heating systems, etc. In Canada, such devices are widely represented products of the German manufacturer ARI-Armaturen GmbH, USA – Everhot, Slovenian – POLIX, Canadian – Corporation BOW fittings. This is mainly valves, Taco Mixing Valves, Zone Valves, Boiler Feed Valves, Backflow Preventers, Pressure Reducing Valves, Flow Control / Flow Check Valves and Pressure Differential Bypass Valves.
* Industrial valves for special conditions designed to operate at relatively high pressures and temperatures, at low temperatures, in corrosive, toxic, radioactive, viscous, abrasive or granular media. This fixture include: fittings of high energy parameters, cryogenic, corrosive, fountains, valves with PEX radiant heating, valves for abrasive slurries and bulk materialov.
* Special valves designed and manufactured for individual orders on the basis of specific technical requirements (eg, for experimental and unique industrial plants, including nuclear power plants).
* Ship fittings available for work in specific conditions of the river on boats and the navy with the exacting demands for the minimum weight, vibration resistance, high reliability, the special conditions of management and operation.
* Plumbing fixtures are equipped with various household appliances: gas stove, bathroom installation, kitchen sinks, etc. Basically this ball valves, check valves, pressure regulators, filters, control valves. This type of fixture in our market are brought trademarks HERZ (Austria), Danfoss (Denmark) Heimeier, Oventrop (Germany), Far, Brandoni (Italy).