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Instructions on how to install the rotameter

Rotor flowmeters are generally divided into glass rotor flowmeters and metal tube float flowmeters. Generally, they can operate normally for a long period of time without maintenance after installation. Therefore, the installation of the rotor flowmeter also needs to be paid attention to. For the liquid which is easy to precipitate crystals or easy to solidify, a metal tube rotameter with a jacket should be selected. Rotor flowmeter installation and use precautions:
1. Instrument installation direction
The vast majority of rotameters must be mounted vertically on a vibration-free pipe with no significant tilting and fluid flowing through the meter from bottom to top. The meter does not have strict upstream pipe length requirements, but there are also manufacturers required (2-5) D length.
2, for the installation of dirty fluid
A filter should be installed upstream of the meter. A metal tube rotameter with magnetic coupling for magnetic fluids that may contain magnetic impurities should be fitted with a magnetic filter in front of the instrument. To keep the float and the cone clean, especially for small-diameter instruments, the cleanliness of the float significantly affects the measured value.
3, the rotor flowmeter flow value should be converted
If the instrument is specially customized to the rotor flowmeter manufacturer according to the medium parameters such as density and viscosity, the liquid instrument is usually calibrated with water, and the gas meter is calibrated with air, and the value is in the engineering standard state. When the fluid density and gas pressure temperature of the use conditions are inconsistent with the calibration, the necessary conversion is required. Conversion formulas and methods Rotor flowmeters are detailed in the manufacturer's instructions for use.
Rotor flowmeters mainly measure single-phase liquids or gases, and liquids containing particulate solids or gas containing droplets are generally not suitable. Because the float attaches particles or tiny bubbles in the flow, it will affect the measured value. If it is necessary to transmit the signal for total accumulation or flow control, a metal tube rotor flowmeter (ie, a metal tube float flowmeter) for electrical signal output is generally selected. If the ambient atmosphere has explosion-proof requirements and there is a gas source for controlling the instrument at the site, the remote metal tube rotor flowmeter is given priority. In short, the selection of different types of flowmeters for different use environments and usage requirements is particularly important.

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