Description
Flapper Scale Sight Glass Flow Indicator
The working principle of the swing-plate sight glass. The straight-through sight glass is currently a widely used sight glass
style. It is used in the pipelines of the power station, oil refining, chemical industry, fertilizer, metallurgy, mining, papermaking,
environmental protection, municipal construction and other industries, but When working on colorless and transparent liquid
pipelines, such as cooling water, gasoline and other pipelines, the observation is not clear and unintuitive, and it is even
impossible to see whether there is a medium flowing in the pipeline.
There is a tongue that can swing freely with the medium, and the tongue naturally sags vertically with the pipeline. When there
is no medium flowing in the pipeline, the tongue is in a closed state. When the medium flows in the pipeline, the tongue will
follow According to the intensity of the medium flow, the corresponding rotation is made to a certain angle, so that the position
of the tongue can be observed more intuitively in the pipeline.
Maintenance and maintenance of glass windows
1. The glass window is used to observe the flow reaction of liquid, gas, steam and other media and should be kept clean
and dust-free.
2. The window glass is suitable for damage, so be careful when installing the sight glass.
3. The temperature and pressure resistance of glass has certain limitations, depending on the actual situation.
Temperature resistance: tempered borosilicate glass≤200℃, quartz glass≤1000℃, aluminosilicate glass≤450℃
Pressure resistance: tempered borosilicate glass sheet ≤2.5MPa, quartz glass sheet ≤10.0MPa, aluminum silicate glass ≤6.4MP
Precautions for use
1, the installation of the sight glass
Arbitrary installation of swing-plate sight glass without installation restrictions is its characteristic
2. Sight glass lens installation
Make sure that the lens holder is flat and smooth, and the gasket between the lens and the lens holder is installed
smoothly, and the gasket is not damaged and does not stick to grease. Before tightening the screws, make sure that
the mirror holder and cover are installed correctly, and then slowly tighten the screws.
3. Carefully check the nameplate parameters, not only to make sure that the components connected to the sight
glass lens are well sealed, but also that the sealing between the sight glass and the welding flange is good,
and to ensure that the pressure in the pipeline does not exceed the rating of the swing plate sight pressure.
4. Do not put additional pressure on the sight glass after installation, otherwise it will cause uneven force on
the sight glass and cause the sight glass to break.
