مقاييس الضغط .. الآلات التي نستخدمها كل يوم وكيف تؤدي عملها

Pressure Gauges.. The Instruments We Use Every Day and How They Perform

Pressure Gauges:

If you use steam heat to heat your home, as most homes do, there must be a boiler in your basement that heats water to turn it into steam. This steam is not like the mist that comes out of a tea kettle or boiling water. This is because the steam pressure in the kettle is higher than the steam pressure of the tea pot, meaning that it rushes forcefully against the walls of the kettle from the inside as it rushes with the same force into the steam pipes and heaters. Increasing the pressure beyond a certain limit causes an explosion in a weak spot in the container that contains it. In order to measure the amount of pressure of this steam, boilers are equipped with pressure gauges.

The operation of the pressure gauge is similar to the operation of the toy called (snake whistle). This is a tube of rolled paper, with a mouthpiece at one end, and this is its two ends. If you blow into it, the paper tube straightens. The degree of straightness of the paper tube depends on the force of the blowing, which is exactly what happens in the pressure gauge with one difference, The pressure gauge tube is made of copper instead of paper. The pressure tube (speaker) is connected to the steam boiler. The steam pressure is what causes the tube to straighten. The higher the pressure, the more straight this tube becomes. If it straightens, it moves an indicator that rises and falls at a graduated dial with numbers. This movement shows you the amount of steam pressure in the boiler. Pressure gauges are also used in cars. These gauges are those precise machines that are written on and oil pressure, or sometimes only the word and oil are written on them. Oil is used in the car to lubricate its moving machines. There is a special pump whose job is to circulate oil in the car engine and its machines. The oil pressure shows you whether the pump is doing its job or not.

You can get used pressure gauges from shops that sell car spare parts at the cheapest prices (from the Balah agency, for example).

These gauges are easy to solve and their parts are easy to disassemble, and they also remain in good condition for a long period of time. If you want to see these parts doing their job, remove the dial with a screwdriver, then look in front of a mirror, and blow into the small tube fixed at one end. You will see that the curved tube has straightened a little, and that the pointer has moved, showing you the pressure in your lungs. Since the pressure in your lungs is not equal to the pressure in the car's pump, of course, you do not expect the pointer to move and stop at a large number.