What Do You Need To Know To Operate The Vacuum Pump?
Jun 30, 2019| 1. Check the oil level to prime the oil to the center of the oil mark when the pump is stopped. Too low to the exhaust valve can not act as an oil seal, affecting the degree of vacuum. Too high may cause fuel injection when the atmosphere is started. When operating, the oil level is raised, which is normal. Oil extraction
Use a clean vacuum pump oil of the specified grade and add it from the filler hole. After refueling, the screw plug should be screwed on. The oil should be filtered to prevent debris from entering and clogging the oil holes.
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2.2XZ vacuum pump can be started at once in the atmosphere or under any vacuum. If the pump port is connected to a solenoid valve, it should be operated simultaneously with the pump.
3. When the ambient temperature is too high, the temperature of the oil rises, the viscosity decreases, and the saturated vapor pressure increases, which causes the ultimate vacuum to decrease, especially the total pressure measured by the thermocouple meter. The ultimate vacuum can be improved by enhancing ventilation or improving pump performance.
4. Check that the ultimate vacuum of the 2XZ rotary vane vacuum pump is based on the compressed mercury vacuum gauge. If the pre-extraction calibration is completed, the pump temperature will be stable, the pump port and the meter will be directly connected, and within 30 minutes of operation, it will reach Ultimate vacuum. The value measured by the total pressure gauge is related to the pump oil and vacuum gauge, and the regulation error. Sometimes the error can be very large and can only be used as a reference.
5. If the relative humidity is high, or the pumped gas contains more condensable steam, after opening the pumped container, the gas ballast valve should be opened, and the gas ballast valve should be closed after 20 to 40 minutes of operation. Before stopping the pump, the open air valve can be unloaded for 30 minutes to extend the life of the pump oil.
6. Vacuum pump oil selection: The viscosity of the pump oil affects the starting power and the ultimate vacuum of the pump. When the viscosity is high, the vacuum is favorable, and the starting power is larger. The saturated vapor pressure of the oil at the pump temperature will affect the ultimate pressure of the pump. The lower the better. The viscosity of high-speed vacuum pump oil and 3# diffusion pump oil is larger than that of No. 1 vacuum pump oil, and the saturated vapor pressure is lower than that of No. 1 vacuum pump oil, but the price of 3# diffusion pump oil is higher. The specific oil selected can be selected according to the above description combined with the specific use requirements.
(1) Under normal circumstances, if you want a total pressure of 6X10-2 Pa or more, apply Shanghai high-speed vacuum pump oil. The small pump below 4 liters/second can also be replaced by the No. 1 vacuum oil pump. The direct pump of 8 liters/second or more can be replaced by the 3# diffusion pump oil.
(2) If the vacuum degree is not high, and the oil pollution is frequently replaced, the vacuum pump oil supply is difficult, and the No. 50 mechanical oil can be used instead.
(3) If the ambient temperature is low, the starting is difficult, the ultimate vacuum requirement is not high, and the real house pump oil or mechanical oil with a slightly lower viscosity can be used.
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