Have you ever wondered how glass tubes for variable area flowmeters are engraved? We show you how we do this.
In our day to day, as manufacturers of equipment for flow and level measurement, we carry out a large number of manufacturing processes. Today we show you in a video how the laser engraving process of the glass tubes of variable area flowmeters is done:
Did you find this laser engraving process of the glass tubes of variable area flowmeters interesting?
Surely some clarifications will go well on what you have seen in the video:
We start with something as basic as the scales to be engraved. They are designed on the computer and the operator verifies that the scale corresponds to the flow rate for which the tube has been calibrated.
The initial point that serves as a reference to position the design of the computer is manually marked on the tube.
We select the initial point in the computer to perfectly adjust the beginning of scale and to start the programmed engraving process.
The engraving process of the glass tubes depends on the size of the tube and the scale to be engraved. In the smaller tubes it can last a few seconds to several minutes in the larger tubes.
Once the engraving is performed, the scales of the engraved tubes are painted with an inorganic paint and these are placed in a high temperature furnace so that the paint penetrates the pore of the glass and is fixed.
The high temperature furnace increases temperature gradually until it reaches 530ºC. The duration of the process this time is the same for all tube sizes. About 4 hours between the heating and cooling process.
Engraved tubes painted with organic paint ready to go to
the high temperature furnace
Here you have the variable area glass tube flowmeters that we manufacture in Tecfluid:
If you want to know more about this type of flowmeters for sure it will be useful for you to have a look to the article what is and how does a variable area flowmeter work?