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Yantai steam flowmeter

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1. Working principle of bend tube flowmeter

As a type of differential pressure flowmeter, the working principle of bend tube flowmeter is based on the inertia principle of fluid. When a fluid passes through a curved pipeline, it is forced to undergo circular motion due to constraints. This motion creates a pressure difference between the fluid on the inner and outer sides, which is related to the density, average flow velocity, and curvature radius of the fluid in circular motion. This process follows Newtons laws of motion, which are the laws that all objects in circular motion must follow. The research and development of bend tube flowmeter is based on solid theoretical and experimental research. In theoretical research, numerical solutions of differential equations are used to comprehensively understand the flow patterns of fluids through curved pipes. Experimental research includes a large number of experiments in the laboratory, as well as practical applications in national flow verification stations such as Kaifeng Water High Flow, Yantai Steam, and Huayang Natural Gas, to verify the flow measurement of different media through authoritative verification. These standardized identifications demonstrate the accuracy and reliability of the bend tube flowmeter. Theory and experiments have shown that the fluid flow through a curved pipe is complex and involves the main flow along the main pipeline, double helix secondary flow perpendicular to the main flow, and exit vortex. These flow characteristics can be visualized by solving the Navier Stokes equations (N-S equations). According to the characteristics of viscous fluids, there is a proportional relationship between flow velocity and the pressure difference

Yantai steam flowmeter
between the inner and outer sides. According to dimensional analysis, the relationship between average flow velocity and pressure difference can be given by the following formula: there is a direct calculation relationship between fluid flow velocity and the pressure difference inside and outside the bend, as follows: V=a * [(P1-P2)/ρ] * β, where V is the flow velocity, a is the comprehensive flow coefficient, P1-P2 is the pressure difference, ρ is the fluid density, and β is the exponent. By measuring these parameters, the fluid flow rate can be calculated using the formula Q=S * V * ρ. The bend tube flowmeter is suitable for applications with nominal diameters ranging from 25mm to 2000mm, nominal pressures not exceeding 10MPa, and medium temperatures not exceeding 450 ℃ (special customization is required for temperatures above 450 ℃). It is also suitable for fluids with Reynolds numbers ReD greater than 104. The accuracy level can reach level 1 or 1.5, and the curvature radius to diameter ratio R/D of the bend tube is required to be greater than 1.25. The bent pipe flowmeter, like the conventional orifice flowmeter, belongs to the category of differential pressure flowmeter. However, the way in which the bent pipe flowmeter generates differential pressure is different from that of the orifice flowmeter. The orifice plate generates differential pressure based on the scaling principle of the fluid, while the bent pipe sensor generates differential pressure based on the inertia principle of the fluid.

2. What are the manufacturers of steam flow meters?

Steam flow meter manufacturers include Guangzhou Xisen Automation Control Equipment Co., Ltd., Jiyin Grace Company, Botou Huazheng Machinery Equipment Co., L

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