1. Check the oil level to stop the pump oiling to the oil standard center is appropriate. Low on the exhaust valve can not play the role of oil seal, affecting the degree of vacuum. Too high may cause fuel injection when starting the atmosphere. Operation, the oil level has increased, is a normal phenomenon. The oil is cleaned with the specified grade of vacuum pump oil, added from the filler hole. After refueling, should be screwed on a plug. Oil should be filtered to prevent debris from entering, blocking the hole. 2.2XZ rotary vane vacuum pump in the atmosphere or any vacuum for a start. Pump port, such as attached solenoid valve, should be with the pump at the same time action. 3. Ambient temperature is too high, the oil temperature increases, the viscosity decreases, the saturated vapor pressure will increase, will cause the ultimate vacuum decreased, especially with the thermocouple measured total pressure. Such as enhancing ventilation and cooling, or improve pump performance, ultimate vacuum can be improved. 4. Check the limit vacuum 2XZ rotary vane vacuum pump to compress mercury vacuum gauge, subject to fully pre-pumped by the test, the pump temperature reached a steady, pump port and gauge directly connected to the operation within 30 minutes, will reach the ultimate vacuum . The total pressure gauge measured value and pump oil and vacuum gauge, the regulation error, and sometimes the error can be very large, only for reference. 5. If the relative humidity is high, or be pumping gas containing more condensable steam, connected to be pumped container, the gas valve should be open, 20 to 40 minutes after running off the gas valve. Before stopping the pump, open the air valve for 30 minutes without load to prolong the life of the pump oil. 6.2XZ rotary vane vacuum pump oil selection: the viscosity of the pump oil, the starting power and the ultimate vacuum pump, viscosity is good for the degree of vacuum, starting power is larger. The saturated vapor pressure of the oil at the pump temperature will affect the pump's ultimate pressure, the lower the better. The viscosity of high-speed vacuum pump oil and No. 3 diffusion pump oil is larger than that of No. 1 vacuum pump oil. The saturated vapor pressure is lower than that of No. 1 vacuum pump oil, but the price of No. 3 diffusion pump oil is higher. The specific choice of what oil, according to the above description combined with the specific requirements to choose. (1) Under normal circumstances, where you want the total pressure at 6X10-2 Pa above the application of Shanghai-made high-speed vacuum pump oil. 4 liters / second The following pumps can also be used on behalf of the vacuum pump on behalf of No. 1, 8 liters / sec above the pump available 3 # diffusion pump oil generation. (2) If the degree of vacuum is not high, and frequent replacement of oil pollution, vacuum pump oil supply difficulties, you can use No. 50 instead of mechanical oil. (3) If the ambient temperature is low, difficult to start, the minimum vacuum requirements are not high, the viscosity can be slightly lower than the real pump oil or mechanical oil.
