Rotary vane vacuum pump vacuum pump oil and air dehydration _

How to select the vacuum pump for rotary vane vacuum pump oil

we all know that the vacuum pump oil in the rotary vane vacuum pump plays an important role, especially the 2 x rotary-vane vacuum pump, its performance is closely related to the vacuum pump oil, especially the limiting vacuum of vacuum pump pressure. And the service life. Vacuum pump oil is not only used as a medium for vacuum, also used for lubrication, cooling and seal of the vacuum pump sore spot.

vacuum pump oil, the main performance requirements are as follows:

vapour pressure is very low; This is needed for the vacuum pump for rotary vane vacuum pumps high vacuum, the most important performance are usually based on paraffin base oil lubricant narrow fractions.

good thermal oxidation stability; Vacuum pump continuous development to high speed. Due to the high speed friction between the slider and the pump body, high oil temperature, oil is easy to oxidation and decomposition, especially diffusion pump often at a very high temperature environment, system of steam pressure increases, vacuum degree reduced. Therefore, vacuum water pump oil has good thermal oxidation stability.

the proper viscosity and good viscosity Temperature characteristic: the internal volume of vacuum pump to form changing exhaust, and lubricating oil should have appropriate viscosity and viscosity Temperature characteristic.

oil dehydration

rotary vane vacuum pumps air dry, exhaust valve method above has a blowing operation ( Compression) The air. Use dry coal air from a fine mist that exists in the exhaust pipe to remove water in oil emulsion is very effective. The quadrat method is particularly suited to small single pump pressure is less than 5 Torr of in addition to water, because the side method and gas ballast method is different, and will not affect the pump inlet pressure. In less than 5 work under pressure, use about 5% of the pump exhaust air, and can reduce with the loss of the pressure of work. working temperature is higher, the dry air is dry, the air is hot, the higher the oil purification degree.

for double pump, this is not a method.

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