• February 6th, 2011
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The basic advantage of plastic designs — small weight at enough high prochnostnyh characteristics. Besides, they are simple and convenient in installation. Unlike metal, plastic arts not korroziruet, and its smooth surface allows to use pipes of smaller section, keeping their throughput. Plastic has lower heat conductivity. On plastic walls adjournment don’t accumulate.

However this material has also lacks: rather high factor of thermal expansion and fast aging under the influence of direct sun rays.

Durability of steel pipes considerably above, than polymeric, but they are recommended for open distributings. For the latent distributings in premises polymeric pipes more approach. Single-layered (polyethylene and polipropilenovye) products have predicted term of operation. Multilayered at temperature drops test internal pressure between layers. Quality of such products directly depends on the manufacturer.

Choosing pipes, check up the sanitary-and-epidemiologic conclusion and the conformity certificate. One of criteria of quality — instructions in the certificate that it is given out on a batch production, instead of on once delivered party.

Specify at the seller the maximum admissible temperature of the heat-carrier and compare it with available plans of house heating. Settlement pressure of a pipe — one more criterion of a choice. Diameter of a pipe choose so that to provide easy connection of a radiator with a copper. They define value of this indicator. To calculate and design heating system under force only to skilled masters.

Plastic pipes are convenient that they are easy for cutting. One of ways of connection – compression.

• February 4th, 2011
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THE COMBINED PROOF-READER OF POWER FACTOR OF FEATURE

THE GENERAL DESCRIPTION

Microcircuit ML4819 contains two basic functional parts: the full raising Controller of Power factor (KKM-SCHEME) and the scheme of management of the power supply (SHIM-SCHEME). The KKM-SCHEME is similar to device ML4812 while the SHIM-SCHEME can be used for creation of the two-cascade converter with feedback on a current or pressure. Synchronisation of both schemes is provided automatically as SHIM and the KKM-SCHEME use the same generator. Microcircuit exits provide high speed of increase and the big target current (> 1 And (r-r)), necessary quickly to charge and discharge capacity of a shutter of the field transistor. At device ML4819 designing special measures have been taken to increase a noise stability.

The KKM-SCHEME has an input of reading of the peak current removed from the transformer of a current or from a conclusion for measurement of a current of the special field transistor (so-called SENSE FET), to reduce dispersion of the capacity caused by a current of switching, giving the chance to system to improve by means of a sensitive management method full efficiency on an average current.

The SHIM-SCHEME has blocks for restriction of a current of a running cycle, exact restriction of duration of a running cycle for single-cycle converters and the scheme of correction of increase of a current.

THE MONITOR OF THE LOWERED PRESSURE

When Vcc falls more low 10 In, there comes a UVLO-condition. In UVLO-В the moment of inclusion microcircuit ML4819 is in a condition a condition basic pressure VREF on a conclusion 1181. Equal 5 In, detection of the lowered pressure (in English UVLO or it is switched off that can be used as “flag”. A UVLO-condition) that means LOW level of pressure on an exit and a low consumed current. The microcircuit begins

THE SCHEME OF CORRECTION OF POWER FACTOR

The KKM-PART of scheme ML4819 in all is similar to the scheme of correction of power factor in microcircuit ML4812, except for the scheme of correction of sawtooth pressure. Description ML4812 see.

All subsequent calculations concern to components RT and St mentioned in the mentioned below equations, correspond with components in a Fig. 16 as follows: RT = R16, ST = С6.

• February 3rd, 2011
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We process the wetted brush a site of a wall the area 2-3 м2 and it is left for 3-5 minutes.

Then wide shpatelem it is cleaned off from a wall, thus without damaging it, the bulked up old glue or whitewashing. Then a surface it is washed away by not strongly moistened brush. In a consequence of it, from a wall surface a dust and poorly fixed particles which can serve further as the reason otklejki wall-paper leave.

On the new not dried out yet, plastered walls which have not dried out yet, can pour out a white crystal deposit. It is caused by the alkaline salts appearing through a surface of a wall. If to paste wall-paper, without having waited full prosyhanija walls they can not seize properly.

Remove a dry brush all deposit. Wait about one week. If crystals to appear again it is necessary to postpone a label of wall-paper while the wall won’t dry up. During the winter period prosyhanie can last before half a year.

For this time can cover a wall emulsionnoj with a paint through which the moisture evaporates.

Problem of crude warm and badly aired places, the mold is.

For its removal, soskrebite amazed wall-paper or a paint. Wash up a wall a solution consisting of one part of a chloric lime on five parts of water. In hard cases we process walls fungitsidom. At poklejke wall-paper, choose shlihtu and glue with the maintenance fungitsidov.

After washing off of walls proshpakljujte a wall surface.

At first shpatelem designate all cracks from which the old solution earlier got enough sleep or gets enough sleep.

Then wash up from cracks a dust and slices of old putty. After that start directly to shpaklevaniju.

After shpaklevanija, progruntujte a wall. It is possible to paste wall-paper.

• January 30th, 2011
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Sound insulation

All interesting questions on sound insulation of premises of different function. Services and sound-proof materials.

Thermal protection

All interesting questions on a thermal protection of building designs and industrial targets.

Ognezashchita

All interesting questions on ognezashchite building designs and industrial targets.

• January 29th, 2011
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Dear readers! To me set many questions concerning a choice of firms of manufacturers and fitters of plastic windows. The huge request to those who put windows, send the responses about firms, with instructions of the name of firm and a city. Help other people, not to make the wrong choice firms of manufacturers of windows. To representatives of firms, the request not to disturb, the project will be independent and to be created for people, instead of for advertising of firms.

Responses write in comments or here.

Your responses will be published on a site of Revelation of the seller of windows, without editing and corrections as write so will be and is published, behind an exception not acceptable expressions.

• January 28th, 2011
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Today we will get acquainted with plastic windows more close: we will in details consider the basic components from which our windows consist. So, plastic windows contain following elements in the design: a frame, a double-glazed window, a shutter, impost, accessories, shtapiki and slopes.

Frame

It is a motionless part of a window which establish in a window aperture. Correctly to measure dimensions of an established design experts can only. The frame is a basis for shutters with double-glazed windows and consequently it should meet high requirements of rigidity. Rigidity of a frame depends from located in a metal reinforcing profile. At the window frames executed from PVC, service life makes 30 years and more.

Double-glazed window

The double-glazed window is the transparent part of a window consisting of two-three glasses, germeti-cheski connected on perimeter, and form among themselves an air layer. By means of an air layer it is provided warmly – and a noise isolation. Glass-package happens a different thickness (for example, a designation “4-10-4-10-4? means two chamber double-glazed window consisting of 3 glasses in the thickness 4мм and 2 layers between them 10мм). As filling, as a rule, it is applied specially obrabo-tannyj air, or inert gas that can raise heat-shielding properties of a window considerably. Also it is necessary to tell that the double-glazed window is filled in with hermetic in which role mastic (blocks moisture and dust hit) is used tiokolovaja.

Shutter

It is a mobile part of a window which fastens to a frame and consists from metalloplasti-kovogo a profile and a double-glazed window. The shutter allows a window to open. The shutter can be different kinds and can open in various directions, or to be the deaf person. Thanks to that a shutter and a frame plastic – the window is closed very densely and without warps, providing almost ideal hermetic sealing. Plastic unlike a tree doesn’t give in to aging and deformation: doesn’t inflate from a moisture, doesn’t crack and it is not jarred on on the sun.

Impost

Horizontal or vertical crossbeam which divides a window box into some parts.

• January 24th, 2011
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The goods for health: sale of massage armchairs and masseurs at wholesale prices.

For rest on the nature: guidebooks to the countries, exclusive photos of colours and a nature photo.

• January 22nd, 2011
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The zinced rolled steel.

Characteristics of the zinced steel:

Thickness of a steel of 0,45-0,5 mm

Zinc covering 120-240 g on square meter

Polymeric covering 120-140 g on square meter

Weight of a roll of 7-10 tons

Length of a roll of 50 m

Width of strips shtripsa 80-800 mm (a step of 10 mm)

The zinced steel – advantages

The zinced steel is durable

Otsinkovka steels increases anticorrosive properties became several times. The zinced steel doesn’t change protective characteristics throughout 40-60 years. The zinced steel with a polymeric covering – 60-100 years. A guarantee of the manufacturer on a polymeric covering styles – 20 years.

The zinced steel is steady against differences of temperatures

The zinced steel with a polymeric covering doesn’t change the appearance and anticorrosive indicators at temperatures from-80 to +300 degrees. Thanking these properties the zinced steel it is widely used for manufacture of a metal tile, a professional flooring, otlivov etc.

The zinced steel is economic

The zinced steel is much cheaper than other materials. Production made of it is much cheaper than materials with similar characteristics.

The zinced steel possesses small heat conductivity

The zinced steel reflects heat most part. Absorption level it is considerable below other materials. The given ability is important for installation of a roof and manufacture of a roofing professional flooring and metallocherpitsy. Also the zinced steel is widely used for manufacturing of sandwiches-panels.

The zinced steel has attractive appearance

The zinced steel looks attractively and is modern. The zinced steel with a polymeric covering possesses a wide spectrum of color scores on system RAL.

• January 22nd, 2011
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We with the wife and two children have driven in new apartment angular on 5th floor pjatietazhki. And there was it on 9th of March, in birthday Tarasa of Shevchenko. I had such impression that without special changes here it is possible to live as early as years five. However, it seemed that is a little cool in a hall. But March has quickly flown by in pleasant efforts on the device of an interior of apartment, after all we from other city first moved and half of furniture have given to acquaintances; secondly the old apartment was 2-roomed, and new 3. Therefore colds to feel not upeli. In all rooms face lifting recently has been made. Not super-puper, but it is possible to live. A unique place which repair hasn’t concerned there was a glazed balcony. It has been safely told. Steklili, probably, about 20-25 years ago, it is not less of it. The paint on a frame in places was absent completely, and the gray tree has cracked with temperature drops and humidity, and here and there on-half has decayed. Glasses were a different thickness from 3 to 6 mm! From weight of such thick glasses the cracked frames has warped so that cracks between a frame and glass reached 2 sm, and the draft walked on such “glazed” balcony free, bringing a dust and leaves falling down from the nearest poplar. Have thought that the cold in a hall was because of these cracks on a balcony. With it also have decided to begin repair.

• January 21st, 2011
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First of all, in the first departure this year it was defined with a place for construction. Has measured 6 meters from borders of a site plus of centimeters 30 for emergency.

The sizes of the house – 6 * 8 meters – has designated pegs.

Here so it looked on April, 17th:

By May holidays have removed on a platform all turf, and on May, 3rd have spread a substrate (geotextiles) and have started to fall asleep atop sand.

As a substrate advise to use dornit, but quite approaches and spanbond the maximum thickness from available on sale – leaves much cheaper. To me has managed in 800 rivers (60 sq.).

By May, 13th all platform sand, and the marshy site before the future house – rubble and from above too sand slowly fell asleep. Now it is possible even to approach by the car.