Vacuum pump oil filtration and replacement skills
Vacuum pump oil in use process, due to oxidation, emulsification and the outside world with all kinds of impurities such as reasons, some of the oil deterioration, when bad ingredients and impurities to a certain extent, change the color of the oil, viscosity and acid value increased, the precipitation of insoluble resin material, higher vapor pressure of the vacuum pump oil, the performance deterioration. At this point the pump oil can not continue to use, must replace the new pump oil.
In order to prevent dust and pulverized matter from entering the pump cavity together with the pump oil in the vacuum pump oil, a continuous filter device should be set up for some process. Dust, impurities, and the contaminated oil sink to the bottom of the main tank, through the return pipe into the drop tank after separation, precipitation and emulsification of oil, water, dust and impurities sink to the bottom of the drop tank by the discharge valve is released on a regular basis. While relatively clean oil by in drop tank in upper filter filtered through into the tubing into the oil supply end cover and pump chamber after work.
The filter element in the filter blocks the mechanical pollutants when the oil passes by, purifying the vacuum pump oil. A pressure gauge is often attached to the filter to indicate whether the filter is blocked. When the pressure increases, the oil cannot flow normally. If the filter is blocked, the filter element should be replaced or cleaned.
The rotary vane pump usually check the amount of oil every week. The time interval for oil change depends on the working conditions. Generally, when the limit pressure of the pump rises due to poor oil lubrication, oil decomposition or too many pollutants, it is necessary to replace oil.
From the exhaust valve discharge is pumped medium and oil through separate exhaust hood, gas and part of the steam vent discharge, valve and pump moving, when the pump work. The valve started. Open air mouth shut oil crossroads. When the pump stops, the valve oil junction is closed, while the air inlet is opened, and the air is inflated from the air inlet through the oil inlet to the pump chamber, thus destroying the vacuum in the pump chamber, making it impossible for the vacuum pump oil to enter the pump chamber.
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