As a measuring instrument for trade settlement of water, the water meter has a special performance price ratio. Under the premise of meeting the basic requirements of the water meter verification regulations or the first verification of the water meter, the materials used in the water meter are hygienic and durable, the reliability of the reading is reliable, the pressure loss, the convenience of maintenance and disassembly, and the adaptability to the installation site. (If it is possible to install outdoors), etc. is the main performance of the water meter. For large-diameter water meters used as a master meter, pressure loss is a technical indicator reflecting the energy consumption caused by water meter work and should be considered as an important factor.
In summary, the choice of water meter can be considered from the following points:
(1) Accurate and reliable measurement;
(2) Adapt to the water quality conditions of the pipe network and be durable;
(3) Simple structure and high cost performance;
(4) Large circulation capacity and small head loss;
(5) The initial flow value, the minimum flow value and the boundary flow value are both low;
(6) Easy to repair, easy to adjust, low maintenance cost;
(7) Small in size and light in weight, easy to assemble and disassemble;
(8) The reading meter is accurate and convenient, and is compatible with local management.
Some of the above factors are contradictory. When choosing, we should analyze the pros and cons according to the actual situation.
