Composition And Function Of Vacuum Filtrations

Vacuum filtration device is a kind of instrument for laboratory decompression filtration. Generally speaking, filtration can intercept particles, clarify filtrate, eliminate bacteria, separate solid and liquid, Degas and defoamer. The vacuum filtration uses a filter membrane in the middle of the suction filtration bottle. The filter membrane divides the suction filtration bottle into two parts: the upper part contains the liquid to be filtered and the lower part contains the filtrate after filtration.

Because the filter membrane will produce great resistance to the passage of the liquid, resulting in slow filtration speed or ineffective passage of the liquid, the so-called vacuum filtration is to connect the suction filtration bottle with a vacuum pump to reduce the lower part of the filter membrane The vacuum degree of the bottle body enables the outside air to push the sample in the filter cup through the filter membrane. Therefore, vacuum filtration is a relatively complete system, which is composed of multiple parts. The lack of any part will affect the normal use of the instrument.

1.Vacuum filtrations and filtration pump: equipped with R300 oil-free vacuum filtrations and filtration pump, which is a dry vacuum pump that can be directly used after connecting the power supply. The suction end of the filter pump is equipped with a vacuum regulating valve, which is equipped with a vacuum gauge to facilitate the observation of the working state of the instrument, and adjust the pressure and pumping speed as required. Many customers will consult when purchasing the suction filtration device that they must purchase the suction filtration pump.

Because the pore diameter of the filter membrane, filter paper, filter cloth or filter screen is small, it will cause great resistance to the liquid passing through the filter membrane, which will cause the liquid not to pass through the filter membrane effectively. The suction filtration pump can form a pressure difference between the internal and external boundaries of the suction filtration bottle so that the external air can quickly push the filtrate through the filter membrane without using the suction filtration pump liquid The body can only naturally permeate the filter membrane and drop into the collecting bottle. Therefore, the suction filter pump is a necessary part.