That ordinary consumers got used to call "cranes", specialists in this area call shutoff water valves. The shutoff water valves can intend for water supply systems of various mission (production, economic and drinking, fire-prevention). It is established in the main thing on all branches from the main water supply systems, also at the basis of water struts in buildings and on branches to each apartment. Very comfortably to have separate shutoff valves in harmonous system of the sewerage it is concrete in front of each water distributing device.
At acquisition of shutoff water valves it is not necessary to cope economy questions, after all these products are urged to serve long and long years and to provide at all this very much the highest level of comfort of water use.
The shutoff valves, actually, represent subspecies of pipeline fittings. Its main appointment is overlapping in pipelines of a stream of a working environment. It is possible to carry spherical cranes, locks, gates, latches and other similar devices to shutoff valves.
Statistically the shutoff water valves are more vserasprostranenny type of water fittings as a whole. In fact, the area of introduction of shutoff valves is very vast. Products of this type simply неподменны completely on all water supply systems.
The shutoff valves turn on the case and a mobile locking part in the design. In spherical cranes the role of a lock does a sphere on which axis the opening for pass of a working environment is provided. In locks it is the rotary disk fixed on a shaft in a cavity of the case. Opening or overlapping of a stream of working water occurs at the expense of rotation round own axis of a sphere or a rotary disk. For providing full density between the case and a locking part elastic sealing elements can be provided. Be made shutoff valves can both folding (maintainable), and not folding. Installation on the main pipeline at all this, whether it be pipes making it copper or plastic, is carried out in the main thing by means of flange, carving or privarny connection.
You see the water shutoff valves are structurally most ordinary. At absolutely open situation it has small hydraulic resistance to a working environment. If to consider this production from recognizable producers, it is possible to note that it is very reliable and very long time can perfectly serve you. At present we will not concern bad quality products. After all from time to time in a pursuit of low cost it is possible to run and into such cranes which start to undermine right after their installation.
It is possible to refer its highest safety in operation and simplicity to number of unconditional pluses of water shutoff valves in management. By means of devices of this type it is possible to open and block off traffic of a stream of working water very promptly. Here it is necessary to emphasize that the water shutoff valves as required can be equipped allowing заавтоматизировать management process with it pneumatic, hydraulic or electronic drives.
Buying a soap tray or a hairbrush, it is possible is weakened to trust in own sensual perception, selection of water shutoff valves to create on external signs it is not necessary… Now the market is simply flooded with fine brilliant spherical cranes, usually, containing a loud inscription about own purely Italian origin, but not having any references to a certain producer. Such products can bear truly huge danger of emergency flooding of your neighbors from below. How to find the bad spherical crane on a counter of construction shop?
Let’s begin with weight. The quite good brass spherical crane itself on for itself quite heavy. Take some spherical cranes of various producers and simply take them in hands. That spherical crane which will appear essentially easier than others, it is obvious to you it is not necessary are there can be upressovanny dural sawdust with a filler. Such cranes even without any additional mechanical loading simply under the influence of pressure of water in the pipeline can burst. Also try to behold on scratches and squabblers of the bench (vitrinny) spherical crane gleams of a material of its case. From time to time certain producers specially for this purpose to disseminate doubts of buyers even
remove a part of a brilliant covering from the crane case, showing generous in this case light of brass. Still essentially to direct attention and to the device of consolidation of a rotary rod of the crane. The quantity of cycles of opening closing outright depends on property of this consolidation before emergence of the first drops of leaking water.
Certain manufacturers of locking cranes use the starenky tested way – the sealing nut allowing at the first signs of a leakage it is simple to draw in an epiploon. Others complete the cranes with special sealing rings owning overestimated wear resistance, guaranteeing long term of operation of shutoff valves without necessity of carrying out any procedural works. Both technical solutions in fact are very quite good and about them it is necessary to hold in the head always, in particular being going to make the hands system of water supply of the new house. More awfully when also the podzhimny nut simply is not present, and an epiploon material – not high-quality. Well and if you acquire shutoff valves from recognizable global producers, to think of materials which were applied at its manufacturing, also about quality of epiploons it will not be necessary for you any more. For a long time to you all these moments were обмыслены the companies manufacturers valuing the imenovaniye and reputation.