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Dental Handpiece Does Not Discharge Water Troubleshooting

Introduce the failure analysis and elimination of dental handpieces without water

Tools/raw materials

  • Triple diaphragm valve diaphragm, hexagon diaphragm valve diaphragm.

Method / step

1 Recently, I encountered an annoyance at work. The handpiece started intermittently without water. Finally, there was no water at all. When the water control switch was pressed, the gas flowed back into the water bottle and the water bottle was bubbling.

2.After excluding the problem of the handpiece itself, the foot switch was checked and the water bottle switch was normal. Finally suspected that the triple diaphragm switch and the hexagon diaphragm valve switch problem, bought a triple diaphragm switch and hexagon switch diaphragm, firstly replace the triple diaphragm, the problem exists, then replace the hexagon diaphragm switch, the problem is completely solve.

  1. Analysis: The water supply of the handpiece is controlled by a hexagon switch, which is controlled by air pressure, that is, the air supply to the pedal to control the water supply of the hexagonal diaphragm switch. If the hexagonal diaphragm is broken, the air leaks, the switch is not pressed down, and the water cannot be discharged. At the same time, due to the leakage of the hexagonal diaphragm, the air pressure runs into the waterway, causing the gas to flow back into the water storage bottle.
  2. When purchasing the triple diaphragm, there are two kinds of with holes and without holes. When you buy, you should see it clearly. If you have a hole with your own machine, you don’t need with holes. You need to punch holes yourself. The three diaphragms that were taken apart, the bumps that were seen were caused by the air pressure squeeze, and the new diaphragms were flat.
  3. The hexagonal diaphragm does not need to be modified by itself. There are two kinds of flat and concave, which are the same.

Replacing the diaphragm is simple and economical.

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