Comparison of volumetric water meters and speed water meters
Volumetric water meter is one of the most widely used types of water meters in the world. This type of water meter is widely welcomed by users. In order to meet the needs of the market, our company has also produced a variety of volumetric smart water meters for market use.
The main product of the accumulated water meter is the rotary piston water meter. The disc water meter is not used in China, and only used in a few countries such as the United States. Rotary piston water meters are generally small-caliber specifications, characterized by high measurement levels (up to C and D levels), strong small flow measurement capabilities, and high sensitivity. At present, it is mainly used for the measurement of pure water in pipelines. The inner diameter of the water meter is generally 8, 15 and 20 ram. The repair and debugging of positive displacement water meters is more complicated and requires higher water quality, so it has not been widely used in my country. Also known as piston water meter, it is a fixed displacement water meter. In the national standard, a volumetric water meter is defined as "a water meter installed in a closed pipeline, consisting of a number of chambers of known volume that are filled and discharged successively with fluid and a mechanism driven by fluid.
There are two series of volumetric water meters: rotary piston type and disc type. When water flows through the water meter, the water flow drives the piston (circular type).
The disc) rotates (swings), and the volume of the piston cylinder (disc chamber) is constant, so the piston rotation is measured by the counting mechanism.
The number of times of rotation (disk swing), you can know the water volume flowing through the water meter.
According to the working principle, the water meter products generally used for accumulative measurement of water flow are mainly divided into two types: velocity type and volumetric type. The two have similarities and obvious differences. The comparison of speed hot water meters, I hope to help you deepen your understanding of water meters.
How water meter works:
The volumetric water meter adopts the direct measurement method by measuring the actual flow volume and accumulates the accumulated water flow; while the velocity type water meter measures the flow rate of the water flow and then accumulates the volume of the outflowing fluid, which belongs to the indirect measurement method.
Definition:
The national standard for water meters points out: a volumetric water meter is a water meter installed in a closed pipeline, consisting of some chambers of known volume that are successively filled and discharged with fluid, and a mechanism driven by a fluid; and a speed water meter is installed In a closed pipe, a water meter is composed of a moving element, and is directly caused by the water flow rate to obtain movement.
Scope of application:
Volumetric water meters are generally small-caliber specifications, mainly used for pure water and other flow measurement work with high measurement accuracy requirements and better water quality; while speed-type water meters are suitable for various calibers, mainly used for general tap water measurement, for water quality. The requirements are relatively low, and the scope of application is large.
Measurement accuracy:
The volumetric water meter has high measurement accuracy and good sensitivity, and the measurement accuracy is generally the international C-level and D-level standards; the velocity-type water meter has a large flow capacity, but the measurement accuracy cannot reach the level of the volumetric water meter, which is generally B-level.
In general, it can be seen from the comparison between the volumetric water meter and the speed type water meter that the volumetric water meter has higher measurement accuracy and better sensitivity, but it has higher requirements for water quality, and at the same time, the structure is more complex and the cost is higher. , cannot be widely promoted in my country. The metering accuracy is acceptable, the water quality requirements are not high, and the speed-type water meter with simple structure and low cost will be the mainstream product in my country's water meter market.