The manufacturing process of large-diameter water meters mainly includes the following steps:
Casting: The case and cover of large-diameter water meters are usually made by casting. This step involves pouring molten metal into a mold and forming the desired shape after cooling.
Machining: After casting, the case and cover need to be machined, including cutting, grinding and finishing, to ensure that their size and shape meet the design requirements.
Electrostatic spraying: In order to protect the surface of the case and improve its corrosion resistance, the case is usually electrostatically sprayed.
Assembly: Assemble the case, cover, pipe, nut and other components to form a complete water meter structure. This step requires ensuring the tight connection and stability of each component.
Movement assembly: Assemble the movement part of the water meter, including key components such as flow sensor and counter.
Hydraulic pressure test: After assembly, a hydraulic pressure test is carried out to detect the sealing and pressure resistance of the water meter.
Inspection and packaging: After the hydraulic pressure test, the water meter is comprehensively inspected to ensure that its various performance indicators meet the standards. Finally, it is packaged and ready for delivery.
Characteristics and application scenarios of large-diameter water meters:
Large-diameter water meters usually refer to water meters with a nominal diameter of 50mm and above (DN≥50), which are commonly used for industrial and commercial purposes, such as large buildings, factories and urban water supply systems, etc.
The case connection of large-diameter water meters is usually flange connection, while small-diameter water meters are mostly threaded connection