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  ALVOR model of Lunkenheimer compagny
This model allows the use for a constant level bubbling. The tube plunges in oil. Positionement the top of skew fixes the height of oil in the mechanism to be lubricated. The same assembly is often used for the oilers with vibration with the right end of the tube.
verre lunkenheimer biais du tube
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niveau constant

  Explanation of the constant level :

 

  Oil in the tank out of glass is maintained by the atmospheric pressure. The flow is obtained only when oil is consumed until the top of the tube skew (not A). Then a bubble of air goes up in the vertical tube and the same quantity of oil is diffused 		tout niveau constant axel