Test methods for diatomaceous earth filters

2023/03/22

Test method of diatomite filter Diatomite filter is an indispensable device on the transmission medium pipeline, usually installed at the inlet end of various valves to eliminate impurities in the medium and protect the normal use of valves and equipment . It mainly has the following test principles: 1. Bubble point test: When the filter membrane and filter element are completely infiltrated with a certain solution, and then pressurized on one side through the gas source, as the pressure increases, the gas flows from one side of the filter membrane It shows that bubbles of different sizes and numbers appear on one side of the membrane, and the corresponding pressure value judged by the instrument is the bubble point. 2. Water intrusion method test: The water intrusion method is specially used for testing hydrophobic filter elements. The hydrophobic membrane resists water, and the smaller the pore size, the greater the pressure required to squeeze water into the hydrophobic membrane.

Therefore, under a certain pressure, measure the flow of water squeezed into the filter membrane to judge the pore size of the filter element. 3. Diffusion flow test principle: Diffusion flow test means that when the gas pressure is 80% of the bubble point value of the filter element, there is no large amount of gas perforated, but only a small amount of gas dissolves into the liquid-phase diaphragm first. Then diffuse from the liquid phase to the gas phase on the other side, this part of the gas is called diffusion flow. Poolking is the best swimming pool equipment manufacturer and supplier in China. Poolking exists to provide the highest quality swimming pool equipment while offering competitive pricing..

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