How to choose a household water meter
Attention to the selection of household water meters
Household water meters generally have a caliber ≦50mm and a commonly used water meter with a flow rate of Q3≦16㎥/h. Q2/Q1 is always 1.6. Other values cannot be used, and the pressure loss does not exceed 0.063MPa (0.63bar).
When choosing a household water meter, you should first estimate the size and flow range used under normal circumstances, and then select its upper flow rate as the common flow rate Q3 as the first choice. According to the flow range, choose a water meter with a suitable range ratio of Q3/Q1. Theoretically, the larger the value, the better, but this should be finally determined in combination with service life and price. The level of measurement used in the past is actually the size of the range ratio Q3/Q1.
The applicability of the working environment of the water meter needs to be considered first: such as water temperature, working pressure, working time, measurement range and water quality, etc. to select the water meter, and then according to the design flow through the water meter, to produce the water meter pressure loss close to and not exceeding the specified The value determines the caliber of the water meter.
In compliance with the basic requirements in the JJG162-2009 "Water Meter Verification Regulations" or on the premise of passing the first verification of the water meter, the material used in the water meter is hygienic and durable, reliable and convenient for reading, the size of the pressure loss, the convenience of maintenance and disassembly, and the The adaptability of the installation location (for example, it may be installed outdoors) is the main performance of the water meter. For residential water meters, DN15mm and DN20mm water meters should be selected with the largest possible range ratio and better durability. It is also necessary to consider whether the water pressure pulsation will aggravate the occurrence of idling. The use of smart water meters such as remote water meters and prepaid water meters will facilitate meter reading and settlement and increase the sense of safety of residential users. It can be selected in conjunction with local management methods for water meter reading and settlement.
In short, the selection of a water meter should be considered from the following points: ①The measurement is accurate and reliable;
② Adapt to the water quality conditions of the pipe network, durable;
③Simple structure and low price;
④The circulation capacity is large, and the head loss is small;
⑤The starting flow value, minimum flow value and boundary flow value are all low;
⑥ It is convenient to repair, easy to adjust, and low maintenance cost;
⑦Small size and light weight, easy to disassemble and assemble;
⑧The meter reading is accurate and convenient, and it is compatible with local management.
Combine the actual situation, analyze the pros and cons, and choose the products you need. Also welcome to consult us at any time to help you find the most suitable water meter.