What is a damper? This is a type of regulatory lock valve, which is involved in the systems of the pipeline, to regulate environmental flows, in ventilation equipment. This reinforcement is used to install ventilation and air conditioning heating and in workshops in production. Air damper are used in order to block the combustion products when a fire occurs in the air ducts, various channels of ventilation systems. Apply valve data in accordance with the requirements of SNiP 23 01 99 2003. In order for the damper to provide density, it is necessary to reach a meticulous grinding, for a more effective surface compaction. The experience of using the reinforcement showed that there is no great need to pay attention to the density, occasionally a leak of the environment is allowed. The technology would be complicated if it is necessary to obtain a strong density of these products, as a result of which the sale price would increase. In order to determine the system in the use and selection of density, there is a developed classification of reinforcement according to GOST 9544-60. The shutters are classified by density:
one.Reinforcement designed for dangerous spheres, energy plants and responsible and end valves. Used the density test: water, air and kerosene.
2.Reinforcement used for safe spheres. Testing environment: water and air.
3.Reinforcement designed for safe media on p ? 40 kg/SMG Wednesday for testing: water.
This type of constipation is classified depending on what is used as a seal on constipation with soft and metal seals.
In order to choose a damper in the density class, it must be taken into account that with high pressure of the medium, the surface erosion develops in the places of passage, and if the medium is aggressive, then the corrosion of the metal is not excluded. As a result, the leak is increasing, and the damper will not be suitable, so the reinforcement that is used at high pressure should be with increased density.
This type of reinforcement is worthy of the fact that, first of all, the cost is not high, and secondly, it consists of the least number of elements. The operating temperature of the medium from minus 30 to plus 70, the average service life is at least 9 years. The diameter of the shifts is diverse from 50 to 1,000 mm, and working pressure from 1.0 up to 25 MPa.