For a long time as a shut-off and control valves used valves and gate valves. 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 heating and water systems, are well acquainted with the problems encountered when used as a shut-off and control valves of traditional valves – the need for an annual audit for the packing seals and O-rings, cleaning disks from pollution, the complexity of the emergency line shutdown in emergency situations, lack of integrity, high percentage of failures due to a fall or accident cheeks bolts. Besides all this, the valve has large dimensions and relatively heavy weight. Today is a good alternative to conventional valves and valve – Ball cranes. Ball valves are made of nonferrous metals with thread to the pipeline are already widely used in plumbing, heating, gas, heat and power to individual nodes and industrial facilities. More information is housed here: Dell Computers. On objects of power (CHP, RTS, boilers, CHP, on the pipelines of heat networks), and numerous industrial applications where high demands for reliability, according to applicable regulatory requirements (SNP, etc.) use reinforcement from ferrous metals (including ball valves) with a socket connection to pipeline limited. Shut-off valves of non-ferrous metals do not recommended for use in pipelines with a diameter greater than 50 mm, operating at high temperatures and pressures, as the strength characteristics of the housing and the threaded connection is much lower than the reinforcement of steel and cast iron flange to the pipe and weld.