Hydrants are one of the most important methods of water quenching in industrial enterprises. Purpose of use of hydrants; fighting with fire, providing pressure and sufficient water to fire crews. There are two basic types of hydrants currently in use. These are hydrants with dry bodies and full-bodied hydrants.
1- FILLED HYDRANT
In climatic conditions where temperature values are always above zero, this type of full-hydrants are used. These hydrants usually have a press-type valve on each exit; but there are also types with only one valve that controls all the outputs.
2- DRY BODY HYDRANT
Widely used. The valve that controls the flow of water is a base valve (dry body) hydrant under the freezing point between the foot and the body. The characteristic of this hydrant is that the hydrant body is empty in the usual condition, as it is only allowed to enter the hydrant water when needed. Such hydrants are used in areas where the climate is too cold to freeze the water. In dry hydrants, a drainage system is required for the flow of drained water. As an example, under hydrant soil can be excavated and filled with gravel and stone.
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