Advantages of vacuum pumping unit with oil-free vacuum pump

Vacuum suction filtration devices are used in a wide variety of laboratories, including microbial limit detection, suspension filtration in water, mobile phase filtration, and the like. The vacuum suction filter device consists of two parts, a suction pump and a suction filter bottle. The current mainstream suction filtration devices are mainly equipped with oil-free vacuum pumps. However, when choosing which type of suction vacuum pump to use, users often have many doubts, such as whether the vacuum of the oil-free vacuum pump is sufficient, whether the suction speed will be too slow, whether the vacuum is too high, whether the filter will be cracked, etc. .

When using a vacuum pumping device, the biggest advantage of using an oil-free vacuum pump is that this type of vacuum pump does not need to add pump oil or connect water source, which can effectively avoid the pump oil contaminating the sample. At the same time, unlike the water pump, it is not necessary to connect the water source to avoid Inhale the contaminated filtrate.

The oil-free vacuum pump can generally achieve a vacuum degree of more than 600mmHg (for example, R300 vacuum pump, vacuum degree is 670mmHg), which can meet the filtration of general aqueous solution or solvent, such as medium sterilization filtration, chlorophyll filtration, microbial limit detection. , mobile phase filtration, buffer removal of impurities, etc., without worrying about damage to the filter paper. However, if you are filtering some solid or viscous samples, you should use a pump with a higher vacuum. It is not recommended to use an oil pump at this time (the advantage of the oil pump is that the vacuum is high), because the excessive vacuum of the oil pump may damage the filter bottle or the filter membrane, and the pump oil will also contaminate the sample. You can choose an oil-free vacuum pump with a higher vacuum (such as R410 laboratory vacuum pump, the vacuum can reach 730mmHg or more), for more impurities or viscous samples, such as collecting water samples for suspension filtration, cleanliness detection and filtration, gel Class filtration, mine laboratory sample detection and filtration, etc.

In summary, as long as the correct model is selected, the oil-free vacuum pump can meet almost all the filtering needs, and can avoid unnecessary problems. For detailed product information, please visit the website of Shanghai Lingde Instrument Co., Ltd.

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