Metal tube float flowmeter | River Doppler flowmeter manufacturer | Ultrasonic flowmeter manufacturer in stock

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1. Calculation method of metal tube float flowmeter

The calculation method of metal tube float flowmeter mainly includes the following processes: Firstly, based on the data provided by the user, select an appropriate formula to calculate the flow rate Qs of the calibration medium (such as water or air) under standard conditions (20 ℃, 0.1013Mpa). The formula is: Qs=Q/K, where Q is the flow rate of the user medium and K is the correction factor that needs to be considered. Next, based on the calculated Qs value, determine the corresponding float model and measuring tube diameter by referring to the flow meter. The data in the flow meter is based on the water or air flow rate under standard conditions. After determining the diameter of the measuring tube and the type of float, it is recommended to use the following formula to determine the upper limit value of the measured medium flow rate Q: Q=Qi (the maximum water or air flow rate value corresponding to a certain float number in the flow meter). It should be noted that the influence of viscosity was not considered in the calculation process, which may differ from the actual results of the factory. For liquid media, the calculation of the correction factor K depends on the flow type (volume or mass) and the density of the medium. For example, the correction factor for liquid media is calculated as follows: liquid volume flow rate: K=Q/(ρ f * V) liquid mass flow rate: K=Q/(ρ * ρ f). In its simplicity, ρ f is the density of the float, such as stainless steel (7.8 g/cm ³), polytetrafluoroethylene (3.4 g/cm ³), or nickel based alloys (8.3 g/cm ³), and ρ is the density of the measured liquid. For gas media, the calculation of the correction factor K is more complica

ted, involving density, pressure, and temperature under standard and operating conditions. The specific formula includes: Volume flow rate under standard conditions: K=Q/(ρ st) Volume flow rate under operating conditions: K=(ρ t/ρ st) * (Pt/P0) * (T0/Tt) Gas mass flow rate: K=Q/(ρ * ρ st) Here, ρ st is the gas density under standard conditions, ρ t is the density under operating conditions, Tt is the absolute temperature under operating conditions, Pt is the absolute pressure under operating conditions, P0 and T0 are parameters under standard conditions. The metal tube float flowmeter is produced and researched by Huaian Hengrun Automation Instrument Co., Ltd. using the variable area measurement principle, and is suitable for measuring liquids and gases. All metal structure, including indicator type, electric remote transmission type, corrosion-resistant type, high-voltage type, jacket type, and explosion-proof type. It has standard analog signal outputs of 0-10mA and 4-20mA, as well as early field indication. Accumulation, digital communication, on-site modification of measurement parameters, different power supply functions, with magnetic filters and special specifications. Widely used in industries such as petroleum, chemical, power generation, pharmaceuticals, food, water treatment, etc. During the flow measurement process under tedious, harsh environmental conditions, and various media conditions.

2. National Standards for Float Flowmeters

The national standards for float flowmeters mainly include JJG 257-2007 and GB/T 12241-2005. The following is a specific introduction: JJG 257-2007: "National Metrological Verification Regulations of the Peoples Republic of China for Float Flowmeters" is the core me

Metal tube float flowmeter | River Doppler flowmeter manufacturer

1. Calculation method of metal tube float flowmeter

2. National Standards for Float Flowmeters

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