Vacuum suction pump is usually used together with laboratory vacuum filtration equipment, such as vacuum filter bottle, solvent filtration, multi-filter, solid phase extraction seat, etc. It is one of the commonly used equipment in the laboratory. The following aspects should be noted:
1. Select the pumping pump with the appropriate pumping speed according to the size of the filter device: When selecting the vacuum pump, you should pay attention to the vacuum pump according to the needs to select the vacuum pump of the right size. If the pumping pump with too high pumping speed causes unnecessary waste, the bulk noise is also large. If the vacuum pump with too low pumping speed is purchased, the pumping speed will be too slow. The sciencetool R300 vacuum pumping pump is recommended for vacuum pumping bottles or triple filters below 3000ml. The sciencetool R400 or R600 vacuum pumping pump is recommended for pumping filters or six filters below 10L.
2. If the solid content in the sample is large or the sample itself is extremely viscous, the vacuum pump with higher vacuum should be selected for suction filtration, and the vacuum pump with high vacuum should absorb more suction.
3. If the filtered sample is an organic solvent with corrosive corrosion, a corrosion-resistant diaphragm pump should be selected for filtration, such as sciencetool C300, whose internal structure is PTFE material, and the outer casing part and switch also adopt special anti-corrosion. It is very suitable for filtering corrosive organic solvents.
4. The vacuum suction pump with regulating valve should be selected. When filtering, the filtration speed can be adjusted according to the actual effect. If the vacuum pump pressure is too fast, the filtration membrane may be damaged and the filtration effect will not be obtained. At this time, it can play an important role.
5. The vacuum pump with buffer cup can effectively prevent the liquid from directly sucking into the vacuum pump during filtration, which effectively protects the vacuum pump.
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