Views: 2 Author: Site Editor Publish Time: 2020-07-21 Origin: Site
The selection of water meter mainly considers the following three factors. The theoretical measurement range of the water meter and the actual suitable flow range, the pressure loss of the water meter and the technical characteristics of the large-caliber water meter.
The theoretical measurement range of the water meter and the actual suitable flow range. The theoretical measurement range of the water meter refers to the range from the minimum flow to the overload flow specified by the national standard. The actual suitable flow range is the recommended flow range recommended according to the structure and technical characteristics of the water meter.
Water gauge pressure loss. The pressure loss of the water meter depends on the structure and size. The horizontal screw-wing water meter flows in and out axially. The water flow is stable and the pressure loss is minimal. The water flow of the vertical screw-wing water meter flows horizontally, vertically, and horizontally. The pressure loss is small. Although the water flow of the compound water meter flows axially, it is blocked by a flow conversion valve. The pressure loss is large. The pressure loss of the water meter is directly related to the flow capacity of the water meter. The cost of water supply and the water supply elevation at peak water consumption are important technical indicators for the selection of water meters.
Technical characteristics of large-caliber water meters. The horizontal rotor wet water meter enlarges the structure of the small diameter horizontal rotor wet water meter. The blades of the impeller are vertical, and the water flow enters the impeller from the impeller box tangentially. It flows out from the water outlet of the impeller box through rotation and complicated changes of direction. The water meter flows out after rotating and changing direction. Therefore, the structure is huge and the pressure loss is large. There is a bowl-shaped filter in the table to block debris. The antifouling ability is relatively good.
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