Metal tube floater flowmeter can be used for low Reynolds number, choose floater with viscosity-insensitive shape, if the Reynolds number at the flow ring gap is greater than 40 or 500, Reynolds number change flow coefficient is kept constant, ie fluid viscosity change does not affect flow coefficient . This value is much lower than the minimum Reynolds number of 104-105 for throttling differential pressure meters such as standard orifice plates.
Most of the metal tube float flow meters do not have upstream straight pipe requirements, or they do not require a high level of upstream straight pipe sections. Metal tube float meters have a wide range of flow rates, typically 10:1, a minimum of 5:1, and a maximum of 25:1. The output of the flow detection element is close to linear. Lower pressure loss.
Compared with most turbine flowmeters and vortex flowmeters, their requirements for measuring the environment are relatively high. If there is a vibration source in the measurement environment, it will have a greater impact on the accuracy of the measurement, and the metal tube float flowmeter has its structural principle. Vibration sources do not affect the measurement accuracy. Turbine flowmeters and vortex flowmeters are also required for the upstream straight pipe section. It is necessary to reserve a straight pipe section about 3 times of the measuring pipe. In addition, vortex flowmeters have higher pressure losses than metal tube float meters.
Compared to the glass rotameter, the metal tube float meter has no risk of the cone breaking. Compared with the glass tube float flowmeter, the use of temperature and pressure tolerance range. Most of the structured float flowmeters can only be used for plumbing installations that run vertically from bottom to top.
Float flowmeter applications are limited to small and medium diameters. Common full-flow floater flowmeters cannot be used for large diameters. Glass tube float flowmeters have a maximum diameter of 100mm. Metal tube float flowmeters have a diameter of 150mm. Larger diameters can only be used for flow distribution. Type instrument.
In a few words , the advantages and disadvantages of metal tube float flowmeters and glass rotor flowmeters and turbine vortex flowmeters are completely inadequate. More detailed differences can be found in the flowmeter manufacturers, such as Changzhou, a well-known and experienced flowmeter manufacturer in China. Good state. Before purchasing the flowmeter, it is best to consult our professional customer service staff. If you do not understand the specific parameters of the flowmeter, you can let the manufacturers help you to choose the type.
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