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How can I test my filtration equipment using professional testing methods?
How can I test my filtration equipment using professional testing methods?To test the performance of a piece of equipment, a good method is to use the bubble point test, this method requires a certain pressure to make the gas break through the wet filter membrane and the gas flows out from the membrane pores, and the pressure value at this point is the bubble point of this membrane, the method to determine this pressure value is the bubble point method.In the case of a good performance cartridge, the air will pass through the liquid film formed after the filter membrane pores have been wetted after diffusion, and this time the flow rate through is measured to obtain the value of the forward flow. This value can be the amount of air passing downstream of the membrane under pressure, or it can be the air flow rate required upstream of the membrane at a certain pressure. If the blistering point test is to be carried out, it is good to use the blistering point tester produced by the professional manufacturer, without this equipment, the test can also be carried out manually, we only need to have a sterilization 0.22μm cartridge or filter membrane as the blistering point can be, the specific method is as follows. 1. Wet the device to be tested completely with water for injection and install it in the infusion line system, at this point add the appropriate amount of water for injection to the device to submerge the filter membrane or cartridge. 2. Slowly feed compressed air into the feed end, taking care that the pressure is set by the instrument's requirements. 3. 3. When testing manually, slowly increase the compressed air until the different pore sizes of the membrane or cartridge have a fixed bubble point value, and observe whether bubbles appear at the outlet of the water for injection at the bubble point value. 4. The instrument can automatically give the result when testing, indicating whether the result is qualified or not. If bubbles emerge from the test, it means that the pressure value is equal to or greater than the manufacturer's small bubble point value, which is also an unqualified product. 5. Generally speaking, the cartridge produced by the manufacturer can be reused, and sometimes the result of our test is not entirely indicative of a leaking or damaged cartridge but may be due to unclean cleaning and residual substances affecting the bubble point test. |
