For a long time as a shut-off and control valves used valves and valves. In this case, very often it was the valves and valves made of cast iron and very high quality. Many professionals who work in the field of installation and operation of various systems of heating and water, are well acquainted with the problems encountered when used as a multipurpose valves traditional valves – the need for an annual audit for the packing and cleaning rings sealing discs from dirt, the complexity of the emergency line shutdown in emergency cases, a lack of integrity, a high percentage of failures due to a drop jaws or broken bolts. Besides all this, catches have large dimensions and relatively heavy weight. Today is a good alternative to conventional valves and valve – Ball cranes. Ball valves, non-ferrous metals with a threaded connection to the pipeline is already widely used in plumbing, heating, gas, heat and power to individual nodes, and industrial facilities. To objects of power (CHP, rts, boilers, chp, the heat network pipelines), and numerous industrial applications where high requirements for serviceability, in accordance with applicable regulatory requirements (snip, etc.) the use of fittings made of nonferrous metals (including ball valves) with Ring Joint connection to the pipeline is limited. Valves and fittings made of nonferrous metals, not recommended for use on pipelines with a diameter greater than 50 mm, operating at high temperatures and pressures, since the strength characteristics of the case and bolting significantly lower than that of the armature steel and cast iron with flanged connection to the pipeline and the weld.