Ball valve PND and its features. Fittings for HDPE pipes - compression, brass: connection methods Fittings for various pipe connection methods

Polyethylene pipe fittings low pressure are an indispensable element in professional work connected with the installation of a pipeline for heating or water supply. They are a transition to a threaded connection. The fittings are quite versatile and work well when using PE, steel or other pipe. By choosing quality product, you guarantee that the pipeline will be protected from leaks and other similar problems. The company offers products of such brands: ITAP, Tiemme, Unidelta.

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Tee crimp TIEMME 40 is a necessary element used to connect polyethylene and PEX pipes of the same diameter when installing cold and hot water supply systems, heating in residential, administrative, industrial buildings, when laying technological pipelines, pneumatic pipelines transporting substances to which polypropylene is chemically resistant. Tee connection type - crimp. Tee material crimp TIEMME 40 - brass CW617N (zinc washout resistant). Operating conditions of the tee crimp TIEMME 40: working pressure up to 30 bar, maximum working temperature +110 degrees Celsius, working medium - non-aggressive liquids such as hot and cold water, oils, compressed air etc. Compression connection does not require any additional devices for installation, except for a wrench.

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Sale price: RUB 1,973.07

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Tee crimp-H TIEMME 25х3 / 4 "x25 is a necessary element used in the transition from the crimp part to threaded connection polyethylene and PEX pipes when installing cold and hot water supply systems, heating in residential, administrative, industrial buildings, when laying technological pipelines, pneumatic pipelines transporting substances to which polypropylene is chemically resistant. Tee connection type crimp-H TIEMME 25х3 / 4 "x25 - crimp and external thread. Tee material crimp-H TIEMME 25х3 / 4" x25 - brass CW617N (resistant to dezincification). Operating conditions of the tee crimp-H TIEMME 25х3 / 4 "х25: working pressure up to 30 bar, maximum working temperature +110 degrees Celsius, working medium - non-aggressive liquids such as hot and cold water, oils, compressed air, etc.

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Tee crimp-H TIEMME 40x1 "1 / 4x40

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Tee crimp-H TIEMME 40x1 "1 / 4x40 is a necessary element used in the transition from the crimp to the threaded connection of polyethylene and PEX pipes when installing cold and hot water supply systems, heating in residential, administrative, industrial buildings, when laying technological pipelines, of pneumatic lines, transporting substances to which polypropylene is chemically resistant. Tee connection type crimp-H TIEMME 40x1 "1 / 4x40 - crimp and external thread. Tee material crimp-H TIEMME 40x1 "1 / 4x40 - brass CW617N (resistant to dezincification). Operating conditions of the tee crimp-H TIEMME 40x1" 1 / 4x40: working pressure up to 30 bar, maximum operating temperature +110 degrees Celsius, operating environment - non-aggressive liquids such as hot and cold water, oils, compressed air, etc.

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Tee crimp-H TIEMME 50x1 "1 / 2x50

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Tee crimp-H TIEMME 50x1 "1 / 2x50 is a necessary element used in the transition from the crimp to the threaded connection of polyethylene and PEX pipes when installing cold and hot water supply systems, heating in residential, administrative, industrial buildings, when laying technological pipelines, of pneumatic lines, transporting substances to which polypropylene is chemically resistant. Type of connection of the tee crimp-H TIEMME 50x1 "1 / 2x50 - crimp and external thread. Tee material crimp-H TIEMME 50x1 "1 / 2x50 - brass CW617N (resistant to zinc washout). Operating conditions of the tee crimp-H TIEMME 50x1" 1 / 2x50: operating pressure up to 30 bar, maximum operating temperature +110 degrees Celsius, operating environment - non-aggressive liquids such as hot and cold water, oils, compressed air, etc.

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Tee crimp-H TIEMME 63x2 "x63 is a necessary element used in the transition from the crimp to the threaded connection of polyethylene and PEX pipes when installing cold and hot water supply systems, heating in residential, administrative, industrial buildings, when laying technological pipelines, pneumatic pipelines, transporting substances to which polypropylene is chemically resistant. Tee connection type crimp-H TIEMME 63x2 "x63-crimp and external thread. Tee material crimp-H TIEMME 63x2 "x63 - brass CW617N (resistant to zinc washout). Operating conditions of the tee crimp-H TIEMME 63x2" x63: working pressure up to 30 bar, maximum operating temperature +110 degrees Celsius, working medium - non-aggressive liquids , such as hot and cold water, oils, compressed air, etc.

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Tee crimp-B TIEMME 25x3 / 4 "x25 is a necessary element used in the transition from the crimp to the threaded connection of polyethylene and PEX pipes when installing cold and hot water supply systems, heating in residential, administrative, industrial buildings, when laying technological pipelines, of pneumatic lines, transporting substances to which polypropylene is chemically resistant. Tee connection type crimp-B TIEMME 25x3 / 4 "x25 - crimp and internal thread... Tee material crimp-B TIEMME 25х3 / 4 "x25 - brass CW617N (resistant to dezincification). Operating conditions of the tee crimp-B TIEMME 25х3 / 4" x25: working pressure up to 30 bar, maximum operating temperature +110 degrees Celsius, working environment - non-aggressive liquids such as hot and cold water, oils, compressed air, etc.

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Tee crimp-B TIEMME 63x2 "x63 is a necessary element used in the transition from the crimp to the threaded connection of polyethylene and PEX pipes when installing cold and hot water supply systems, heating in residential, administrative, industrial buildings, when laying technological pipelines, pneumatic pipelines, transporting substances to which polypropylene is chemically resistant. Tee connection type crimp-B TIEMME 63x2 "x63 - crimp and internal thread. Tee material crimp-B TIEMME 63x2 "x63 - brass CW617N (resistant to zinc washout). Operating conditions of crimp-B TIEMME 63x2" x63: working pressure up to 30 bar, maximum operating temperature +110 degrees Celsius, working medium - non-aggressive liquids , such as hot and cold water, oils, compressed air, etc.

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The elongated crimp sleeve TIEMME 63 is a necessary element used to connect polyethylene and PEX pipes of the same diameter when installing cold and hot water supply systems, heating systems in residential, administrative, industrial buildings, when laying process pipelines, pneumatic pipelines transporting substances to which polypropylene is chemically resistant ... Coupling connection type - crimp.

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Currently, when laying communication lines for various purposes, low-pressure polyethylene pipes (HDPE) are often used. Their installation is carried out using special fittings, which include and Ball Valves... Next, we will consider what these products are, what they are and what their features are.

Polyethylene ball valve 25 - 25 mm

Features of HDPE ball valves

Plastic ball valves for HDPE pipes are shut-off valves designed to completely shut off the flow of liquid transported through the pipeline. They are called spherical for the reason that the locking mechanism is made in the form of a ball with a through hole.

The ball can be rotated 90 degrees in the housing to open or close the passage. The position of the locking mechanism is controlled by a lever. In taps large diameter(150 mm and more) the locking mechanism is controlled by an electric drive, pneumatic or hydraulic drive.

The body of these devices is made of HDPE, i.e. the same material as the pipeline itself. The locking mechanism is most often made by manufacturers from polypropylene or another type of plastic.

Advantages

The shut-off valves in question have many positive qualities, among which are:

Durability - the product can last 25 years or more. Durability largely depends on the operating conditions of the product.
Reliability due to the simplicity of the design.
Low price due to the cheapness of materials.
Low weight of products.
High degree of tightness.
Due to the fact that the device is made of plastic, it does not corrode, and besides, there is practically no sediment deposition on it.

disadvantages

For objectivity, we will also present some of the disadvantages of the devices under consideration:

Cannot be used to regulate the flow, as in this case they quickly fail.
Like other HDPE fittings, they are designed for lower pressure than metal fittings.
As the temperature rises, the strength of the device decreases.

Note!
Before using a plastic ball valve for HDPE pipes, you must make sure that its characteristics correspond to the conditions in which it will be used.

Types of valves for HDPE

In addition to the fact that the devices in question differ in diameter, they can also be designed to different ways installation:

Collet (compression);
Flanged;
Welded.

Below we will take a closer look at the features of each type of device.

Collet

These devices are used for pipelines of small diameter - 20 mm - 110 mm. Their main feature is ease of installation, which can be done by hand without using special equipment, and not possessing the skills of such work.

Note!
For high-quality installation of the crane using a collet method, it is necessary to strictly perpendicular to their axis and chamfer a few millimeters, as shown in the diagram above.

As a rule, these valves are used in domestic water supply systems. Below are the main characteristics of these devices:

Specifications may vary slightly depending on the device model. However, in general they correspond to the data from the table.

It must be said that compression valves can have either the same dimensions of the inlet and outlet pipe, for example, 32 - 32 mm, or different, i.e. can serve as adapters between pipes of different diameters.

In the photo - flanged polyethylene valve

Flanged

Flanged HDPE ball valves are used for large diameter pipelines (up to 315 mm). They are bolted to the pipeline using flanges. As a collet, this connection is collapsible.

In contrast to devices of the previous type, flanged shut-off valves are able to withstand higher pressure. Often, this shut-off valve is used in chemical industry, as they are resistant to acids and alkalis, and also do not corrode.

Welded

This connection method is used in cases where it is necessary to ensure tightness. Installation instructions in this case are more complicated.

Welding can be done in two ways:

Butt- using a special welding machine that melts the ends of two parts to be welded. Subsequently, the parts are docked under pressure.
Electrofusion method- heating of the surfaces of the parts to be joined in this case is carried out with the help of shaped parts through which the metal spiral passes. As a result, the parts to be connected and the electrofusion joint are welded together, providing a reliable connection.

Here are, perhaps, all types of polyethylene ball valves.

Output

Polyethylene ball valves are reliable shut-off valves, used for various types of pipelines from HDPE pipes. As we found out, depending on the purpose of the line and its diameter, they can be mounted in different ways.

From the video in this article, you can pick up some Additional information on this topic.

Connecting elements can be classified according to a number of characteristics:

1. Purpose of application

connection of pipes with equal diameter;
joining pipes with different diameters;
creation of branch pipelines;
pipe turning device;
for installation in unified system pipes with various fittings;

2. Installation method:

compression;
welded;
electrowelded;

3. Hardness:

rigid - exclude any possibility of pipe movement;
flexible - slight longitudinal movement of pipes and rotation by a small angle are allowed. In this case, all created connections are not violated and remain unchanged;

4. Connectivity:

detachable - allow you to create durable and sealed connections, which at the same time can be disassembled if necessary, for example, for repair, reconstruction and change of the pipeline route;
one-piece - as a rule, they are used to create pipe joints underground, in concrete, etc. This type of connection is the most reliable, but does not allow disassembling the system into separate components.

Where to buy fittings at an affordable cost

Our catalog offers big choice connecting elements for HDPE pipes. Here you will find compression, cast, electrofusion fittings. We supply products directly from the manufacturer, this allows us to form attractive prices without additional markups and overpayments.

Pickup points in the cities of Moscow, Klimovsk and Novomoskovsk will allow you to pick up the goods in convenient place... You can also order delivery in Moscow and the Moscow region.

Fittings for HDPE pipes (low pressure polyethylene) are in demand in residential and private construction, they are used as connecting fittings for cold water supply, sewerage systems and gas pipelines. As a rule, they can withstand a working flow pressure of up to 10 atm for gas or 16 atm if water is being transported.

Fittings provide reliable and quality installation NPD pipes, which does not take much time and does not require much effort, for example, compression couplings can be installed using only a wrench.

The sale of these products is established in almost any city, so there will be no problems with the acquisition. The cost of fittings is influenced by the type, size, and different kinds technical parameters.

Fittings used in the installation of pipes made of HDPE are usually classified according to the type of connection; the following options are currently practiced:

the use of electrofusion welding;
crimp (collet) connection method;
butt welding;
flange connections.

Accordingly, each method requires the use of its own type of pipe fittings. Let's consider each of them in detail.

Video: HDPE compression fittings, couplings, bends

Butt welding

For this method, connecting fittings are not needed, since the pipes are welded directly end-to-end. Welding allows you to provide almost any design solution.

The figure shows all the stages of this process:

a - centering the pipes relative to each other;
b - a chamfer is removed from the ends of the pipes, its width is from two to three millimeters. After that, the ends are cleaned and degreased;
c - ends are checked for alignment;
d, e - using a heater fixed between the ends, polyethylene is melted;
f - pipes are connected, during this process it is necessary to prevent them from turning and displacement.

The cooled connection is immediately ready for use.

Main advantages:

low cost;
quick installation.

Disadvantages:

it is not possible to connect pipes without welding equipment;
welding is permissible only when the pipe thickness is more than 5mm.

Electrofusion welded connection

This technology will help in cases where it is impossible to apply conventional welding, for example, when welding equipment cannot be installed at the joint. Connecting fittings for HDPE pipes are electrofusion fittings (couplings) on which an open electric heating coil is installed.

To connect pipes with this method, you need welding machine equipped with a barcode scanner, a photo of such a device is shown in the figure below.

The connection process is performed according to the following algorithm:

preparatory stage, it consists in the fact that before welding polyethylene pipes their ends are cleaned and degreased;
the pipes are pushed into the socket of the coupling, and the embedded thermoelement is connected to the welding machine;

using the scanner, the barcode printed on the body of the connecting fittings is read, this is required to set the required mode;
after switching on, the polyethylene layer melts, while the pipe expands from heating, as a result of which it is pressed against the sleeve;
the device automatically turns off, according to the selected mode, after natural cooling, the connection is ready for use.

This method is good because it does not require special skills, it is completely easy to learn it. But there is a significant drawback of this technology for connecting HDPE pipes - high prices for welding equipment and fittings.

Crimp (collet) method

Threaded (collet) joints of pipes made of HDPE are more popular than other methods, this is due to the fact that there is no need to resort to expensive specialized equipment.

Everything assembly work can be done conventional tool, in rare exceptions, a wrench may be needed (when crimp nuts with a diameter of 63 to 110 mm).

Note that in addition to connecting pipe fittings for crimp connections, a shut-off valve is also produced, that is, on which taps are installed, which significantly expands the scope of its application when conducting a water supply system.

Using compression fittings for connecting pipes made of HDPE material with a diameter of 20, 32, 50 mm, etc., you can independently assemble a reliable and durable water supply system for a house or apartment. This is easy to do if you adhere to the following recommendations:

choose pipe fittings from well-known manufacturers, for example, Tiemme or Unidelta, this will avoid numerous problems during operation;
connect to a standard thread, which it is desirable to pre-clean and calibrate;
do not tighten the thread to the stop, always leave one or two turns free;
for sealing, you can use a special Teflon tape, sealant or, in extreme cases, linseed tow... Remember that the fittings are plastic, not metal, so you do not need to apply great force to them when tightening;
it is recommended to install the connecting elements in a straight section, in this case the risk that the pipe will be turned out or flattened is minimal;
Use a wrench to securely hold large diameter pipes when tightening the nut.

To connect pipes made of HDPE material together by a crimp method, you can also use brass fittings, which, although they are much more expensive, have many advantages, namely:

couplings are more reliable and durable than polyethylene counterparts;
they have a higher pressure head threshold, which ensures resistance to water hammer;
the material is not subject to corrosion;
when tightening the nut, you do not have to worry about the thread breaking.

The only drawback, as mentioned above, is the high cost, but if you can afford not to save on quality, then we recommend using this particular type of pipe fittings.

Flange connections (adapters for metal and metal-plastic pipes)

It is impossible to do without this type of pipe fittings if it is necessary to ensure a transition from pipes made of HDPE to metal pipes, for example, for connecting to a riser.

Approximate price level

We give the price level in various cities of Russia for the most common type of connecting elements for HDPE pipes, namely, compression fittings, this information can be useful if you are going to buy them, but there is no time to do a comparative analysis.

The average price level for fittings for HDPE pipes in different regions of Russia is approximately the same, the cost of the device in Nizhny Novgorod, Samara, Chelyabinsk and Moscow is approximately at the same level. The survey was conducted for retail prices, therefore, the wholesale price will be lower.

Low pressure polyethylene (HDPE) is a solid polymer material obtained by the polymerization of ethylene. HDPE has the following physical and chemical properties:

waterproofness;
plastic;
strength;
lightness;
acid-base, corrosion, temperature resistance;
good heat and sound insulation.

The above properties determine the popularity of the use of low-pressure polyethylene in various industries industry. Primary processing of HDPE is carried out in four available ways:

Extrusion - Forcing molten material through an extruder. Allows you to receive food and garbage bags, conveyor nets, construction belts, sheets, pipes, etc.
Injection molding - injection of HDPE melt into a mold followed by cooling. The technology products are compression fittings for HDPE pipes, furniture fittings, plastic boxes, kitchen attributes, etc .;
Blowing - Injection of a polymer into a cavity in the form of an internal shape of the desired product. This technology allows you to get cans, tanks, barrels, cisterns, etc.
Rotoforming - loading the polymer in powder / liquid form into a hollow rotating mold with gradual melting and cooling in it. Used in the production of mannequins, traffic cones, parts for children's playgrounds, etc.

HDPE pipes and fittings

The properties and affordable market price of HDPE determined the benefits of making plumbing and gas pipes... Installation of low-pressure polyethylene pipes (diameter from 10 to 1600 mm) is carried out in three available ways:

Bell-type - used for non-pressure systems (heating, sewerage) if there are bell rings on the pipes;
Compression - used in low-pressure systems (plumbing, irrigation) by screwing a compression fitting onto the pipe;
Electro-welded - suitable for high-pressure systems (drains, gas pipelines), during the installation process, fittings for HDPE pipes and a welding machine are used.

The predominant method of connecting HDPE pipes is compression. It differs in:

ease of assembly / disassembly;
versatility (suitable for all types of pipelines);
high indicators of quality, safety and hygiene.

As noted above, the compression installation of pipes is impossible without the presence of special connecting parts - fittings. Depending on the nature of the connection, HDPE compression fittings can have the following types:

elbow, elbow;
clutch;
flange;
tee, cross;
plug;
ball valve.

All of the above types of compression fittings have a similar design - a polyethylene body with an external thread and a retainer, an O-ring and a ferrule, a sleeve, a nut-cap.

HDPE pipes and compression fittings in Moscow

Buy HDPE pipes and fittings for hot and cold water supply, heating, sewerage systems in Moscow by favorable price it is possible in the Terem online store. The company's catalog contains a wide range of products of the European (REHAU, TIEMME, STP) and Russian (CYKLON, RUVINIL, Dzhileks) manufacturers with detailed description technical characteristics, advantages, areas of application of the product, etc. All products of the online store comply with the ISO 9001 quality standard, are reliable and durable.

"Terem" - reliability, quality, stability.