Since all suction truck vacuum pumps can meet the common point of vacuuming the container, there are other differences. Therefore, when selecting, it must be clear that the tasks that the pump undertakes in the vacuum system are very important. The role of the pump in various fields of work can be summed up in the following aspects: 1, the main pump: the so-called main pump vacuum pumping container is directly vacuumed to obtain the vacuum required to meet the process requirements of the vacuum pump, ultra-high vacuum pump ultra-high vacuum pump is the vacuum pump working in the ultra-high vacuum range. 2. Roughing pump: Roughing pump refers to a vacuum pump that reduces the pressure of a vacuum system from atmospheric pressure to another system in which the pumping system can start working. Crude vacuum pump or roughing pump refers to starting from the atmosphere and lowering the pumped container. A vacuum pump that operates in a vacuum or rough vacuum range after pressure. 3. Suction truck foreline pump: The foreline pump is a vacuum pump used to keep the pressure of the other pump's front stage below its highest permissible fore-stage pressure. The high vacuum pump is a vacuum pump that operates in the high vacuum range. . 4. Maintaining the pump: Maintaining the pump means that when the vacuum system is pumping very little, the main foreline pump cannot be used effectively. For this purpose, a vacuum pump is additionally provided with an auxiliary pre-pump with a low pumping speed to maintain the normal operation of the main pump or the vacuum pump required to maintain the evacuated container. Suction truck vacuum pump is a rough vacuum pump, which can obtain the ultimate vacuum of 2000~4000Pa, and the serial air ejector can reach 270~670Pa. Water ring pumps can also be used as compressors, known as water ring compressors, which are low pressure compressors with a pressure range of 1 to 2 x 105 Pa gauge pressure.
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