Vacuum pump oil in use, due to oxidation, emulsification and the outside world mixed with various impurities and other reasons, some of the oil deterioration, metamorphism and impurities to a certain extent, the oil color changes, the viscosity and acid value increased, Precipitation of insoluble resin-like substances, resulting in the vacuum pump oil vapor pressure increased performance deterioration. Pump oil can not be used at this time, you must replace the new pump oil. In order to prevent the dust in the vacuum pump oil, pull the material with the pump oil into the pump chamber. For some processes. In the pump operation should be equipped with continuous filtration device. After the dust, impurities and polluted oil submerge into the bottom of the main tank, they flow into the auxiliary tank through the oil return pipe and are separated, precipitated, emulsified oil, water, dust and impurities are submerged in the bottom of the auxiliary tank and regularly discharged by the exhaust valve. It is filtered by the filter arranged in the upper part of the auxiliary fuel tank and then enters into the oil separation chamber through the oil inlet pipe to be supplied to the end cap and the pump cavity to work. The filter inside the filter blocks mechanical contaminants as the oil passes, purifying the vacuum pump oil. A pressure gauge is often attached to the filter to show if the filter is clogged. When the pressure increases, the oil can not flow normally. That is clogged filter should be replaced or cleaned filter. Rotary vane pump generally check the amount of oil every week. Oil change intervals depend on operating conditions, generally due to poor lubrication of the oil, excessive oil breakdown or excessive pollutants, which increase the pump's ultimate pressure and require a change of oil. When the drawn medium and oil discharged from the exhaust valve pass through the separate exhaust cap, the gas and a part of the steam are discharged from the exhaust port, the valve and the pump are interlocked, that is, when the pump is working, the valve is started, and the oil passage is opened and the inflation port is closed. When the pump is stopped, the valve oil port is closed and the inflation port is opened, and the atmosphere is inflated from the intake port into the pump chamber through the inlet pipe to destroy the vacuum in the pump chamber so that the vacuum pump oil can not enter the pump chamber.
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