Filtration principle of sintered filter element

Addtime：2022-08-19 08:17:49 Resource：Zhejiang Zhongmao Pneumatic Co., Ltd.

In the manufacturing industry of sintered felt filter elements, because the concept of pollution control and active preventive maintenance of equipment has not been widely promoted, sintered filter element filtration technology has not been widely used. Some advanced imported equipment does not pay enough attention to the filtration precision requirements of the equipment when selecting filtration devices and filter elements, resulting in the cleanliness of oil products exceeding the standard soon after being put into operation, and the accident rate of equipment operation remains high for a long time.

The hydraulic oil filter element (oil suction filter element) must be installed before the stainless steel sintered filter element is refueled. The nozzle covered by the hydraulic oil filter element directly leads to the main pump. The entering of impurities will accelerate the wear of the main pump in light, and the pump will be hit hard. Do not let the oil in the fuel tank come into direct contact with the air, and do not mix the old and new oil, which will help to prolong the service life of the filter element. When replacing hydraulic oil, it is necessary to replace all hydraulic oil filter elements (oil return filter element, oil suction filter element, pilot filter element) at the same time, otherwise it is equivalent to no replacement. Regularly do oil testing. The hydraulic filter element is originally a consumable item, and it needs to be replaced immediately after it is usually blocked.

At present, the β value is usually used to represent the filtration efficiency of the filter element. The so-called β value refers to the ratio of the number of particles larger than a certain size in the fluid at the inlet of the filter element to the number of particles larger than a certain size in the fluid at the outlet of the filter element. Therefore, the larger the β value, the higher the filtering efficiency of the filter element. Before replacing the hydraulic oil filter element, the original hydraulic oil in the box should be drained, and the three types of hydraulic oil filter elements, including the oil return filter element, the oil suction filter element and the pilot filter element, should be checked to check whether there are iron filings, copper filings or other impurities. Component failure, need to be repaired and eliminated, clean the system, and then replace it.

Forward cleaning, which refers to the cleaning method of cleaning agent or cleaning water from upstream to downstream of the membrane, can be done with a pressure slightly greater than that of the filtered product. Reverse cleaning refers to the cleaning method in which the cleaning agent or cleaning water flows from the downstream to the upstream of the membrane. We do not recommend users to use reverse cleaning, especially filters, because after reverse cleaning, impurities in the cleaning agent or cleaning water will remain on the downstream end of the membrane, causing contamination to the next batch of products.

Some people don't know much about stainless steel filter elements. In order to let everyone know about it, I will introduce it in detail.

The quality of the stainless steel sintered filter element is good and bad, and how to distinguish it? The inner and outer pore diameters of the poor quality filter element are basically the same. In fact, only the outer layer plays the role of interception, while the filtration pore size of the good filter element is gradually reduced from the outside to the inside, and the inner layer filtration accuracy It is 5±0.5μm, and the pollutant holding capacity is relatively larger, and the long-term use can also ensure that the quality of the effluent is qualified.

A qualified stainless steel filter element can stand the test. For the outer packaging, it is a test. Now is not the age when the fragrance of wine is not afraid of deep alleys. Only then can we have a more in-depth understanding of the use points of high-quality stainless steel filter elements, thank you for your attention. The most important thing in the stainless steel filter element is the filter screen. The stainless steel filter screen has properties that other filters do not have. The acid and alkali resistance and high temperature resistance of the stainless steel filter screen are much better than other filters. The stainless steel filter is mainly suitable for the petroleum industry. , chemical industry machinery manufacturing and other large-scale production plants, this is because the stainless steel filter

The filtration stability is relatively high, so many manufacturers choose stainless steel filters when choosing filters. Its main three points of performance are as follows:

1. Other filters will shorten the service life in corrosive environments, while stainless steel filters are just the opposite and can still be used for a long time in corrosive environments.

2. At high temperatures above 400 degrees, it can still be used normally, because the filter mesh of the stainless steel filter is composed of multiple layers of spot-welded filter meshes and multiple layers of edge-wrapped filter meshes, which are resistant to high temperature. The performance is relatively good.

3. The hardness of the stainless steel filter element is relatively high. In the grinding environment, there will not be much wear and tear, and the service life is greatly increased. Other types of filters do the exact opposite.