Relevant knowledge of large-caliber water meters: including installation matters and specifications and models!
Water supply units need to accurately measure the water used by users, so they need to use measuring instruments-water meters. Water meters are divided into civil small-caliber water meters and large-caliber water meters. Small-caliber water meters are more common, so they are more familiar. Large-caliber water meters are generally used for the installation of main pipelines in water supply units, factory projects, sewers, agricultural irrigation, municipal pipe network transformation, urban fire water, etc. The one with the larger diameter. Today, the editor sorted out the relevant knowledge of large-caliber water meters: such as water meter specifications and installation precautions.
Common sense of large diameter water meter installation:
1. Before installing a large-caliber water meter, determine what caliber it is, and choose a water meter of the corresponding size to install. The installation direction and the arrow on the watch case must be consistent with the direction of water flow in the pipe!
2. Ensure that there is enough space at the interface of the large-diameter water meter, and the installation position should not be too close to the wall. There should be a straight line pipe with a length of not less than 10 times the diameter of the water meter in front of the meter, and no less than 5 times the length of the diameter of the water meter behind the meter. For straight pipes, if the valve in front of the water meter is directly connected to the water meter, the influence of the valve opening on the error of the water indication value is extremely obvious. The distance between the water meter shell and the wall is lo ~ 30mm.
3. Before installing the large-diameter water meter, the sundries in the pipeline should be removed to ensure that the water meter is clean.
4. For newly installed pipelines corresponding to large-caliber water meters, impurities such as stones, silt, and hemp silk in the pipelines should be removed first. If the water quality is poor, a filter should be installed in front of the water meter, and the filter should be cleaned regularly.
The second is the specifications of large-caliber water meters, most of which are: DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300. The above knowledge is hoped to be helpful to everyone. If you want to know more about water meters, please feel free to contact us.