Bending phenomenon of pressure gauge pointer
After using the pressure gauge for a period of time, but when the pressure of the pressure gauge is unstable, or when the pressure gauge is removed for inspection, we sometimes find that the needle of the original straight sword has changed into a scimitar-shaped needle. If you look carefully, in the “Knife back”will leave a small impact mark or different size of the indentation, it is obvious that the pointer is bent.
Pressure gauge needle bending, a relative disk stop nail, “Knife back”bent down, this situation is due to the pressure gauge in the work, too fast, too hard, so that the needle and repeatedly hit the disk stop nail caused by. This is generally in the pressure gauge needle on the lower side, the needle and disk stop pin contact position, you can see the impact marks, the impact of severe, in this area will leave a gap of varying depth. There is a relative pressure dial stop nail “Knife back”upward bending. This is due to the use of pressure gauges, overpressure is too large, too fast so that the pressure gauge needle clockwise direction impact plate nails and was bent. Also leaves a gap on the upper side of the gauge pointer. The pressure gauge pointer material is generally aluminum alloy plate, if the pressure gauge pointer material is too thin, the material is too soft, also is the pressure gauge pointer is easy to bend the reason.
