Piston water meters are a common type of water meter with the following characteristics:
1. Rotary piston metering structure: The piston water meter uses a rotating piston as the metering structure, which has high metering accuracy. This structure can accurately measure the water flow through the water meter and provide reliable metering data.
2. The counting mechanism encapsulated by special liquid: the counting mechanism of the piston water meter is encapsulated by a special liquid so that the reading is clearly visible and the appearance is compact. This design is convenient for users to read the usage of the water meter while saving space.
3. The water inlet is equipped with a check valve: the water inlet of the piston water meter is usually equipped with a check valve to prevent the water from flowing backward. This can ensure the accuracy of the water meter measurement and prevent the reverse flow of water from affecting the water supply system.
The service conditions of piston water meters usually meet the following specifications:
- Temperature class: T30. This means that the piston water meter can work normally in the environment with a maximum temperature of 30°C.
- Water pressure rating: MAP 10 / MAP 16. MAP stands for maximum working pressure and piston water meters have a hydrostatic rating of 10 or 16 meaning they can withstand water pressure up to 10 or 16 bar.
- Pressure loss rating: △P 63. The pressure loss rating indicates the pressure loss as water flows through the meter. For piston water meters, the pressure loss rating is 63, which means that under normal working conditions, the pressure loss when water flows through the water meter is small.
Piston water meters are suitable for small-diameter specifications and are mainly used for the measurement of pure water and other fluids that require high measurement accuracy and good water quality. They are typically used in applications requiring high metering accuracy. In contrast, speed-type water meters are suitable for various calibers and are mainly used for general tap water measurement. Velocity water meters have relatively low water quality requirements and a wider range of applications.