In simple terms, the main function of the air filter is to separate the liquid water and liquid oil droplets from the compressed air, and filter out the dust and some solid impurities in the air, but it will not remove the water and oil in the gaseous state. Therefore, air filters are generally installed in fields such as pneumatic machinery and internal combustion machinery. So, when it is in operation, how can we determine that the air filter is working properly? When should it be maintained? And when should it be replaced? Now, experts from Tianxiongda will tell you.

The service life and maintenance interval of the air filter should be measured by the ratio of the gas flow rate passing through the filter element of the air filter to the gas flow rate required by the engine:
(1) When the flow rate is greater than the flow volume, the air filter is working normally;
(2) When the flow rate is equal to the flow volume, the air filter should be maintained;
(3) When the flow rate is less than the flow volume, the air filter can no longer be used. Otherwise, the working condition of the engine will deteriorate more and more, and it may even stop working. In this case, a new air filter needs to be replaced.

In actual work, when the filter element of the air filter is blocked and cannot meet the air flow rate required by the engine, the working state of the engine will be abnormal. The specific manifestations are as follows:
(1) The roaring sound is dull, and the acceleration is slow (due to insufficient air intake resulting in insufficient cylinder pressure);
(2) The engine is weak in operation (because the mixture is too rich, resulting in incomplete combustion);
(3) The water temperature rises relatively (the combustion continues when entering the exhaust stroke);
(4) The exhaust smoke becomes thicker during acceleration.

When the above symptoms occur, it can be judged that the air filter is blocked, and the filter element should be removed in a timely manner for maintenance or replacement of the air filter. At the same time, when maintaining the filter element of the air filter, attention should be paid to the changes in the color of the inner and outer surfaces of the filter element. After removing the dust on the surface of the filter element, if the original color of the outer surface of the filter paper is clear and the inner surface is bright, the filter element can continue to be used; if the outer surface of the filter paper has lost its original color, or the inner surface is dim, the filter element must be replaced.

During the use of the air filter element, the filter element is an extremely important component. To extend the service life of the filter element, it is necessary to conduct frequent detections. How to detect the integrity of the filter element's precision is a problem that every user of filter element filters must face. Today, we will talk about it in detail.

As we all know, the filter element is used to remove a small amount of solid particles from liquids or air, which can protect the normal operation of equipment or the cleanliness of the air. When the fluid enters the filter element equipped with a certain specification of filter screen, the impurities are blocked, and the clean fluid flows out through the filter element.

The interfaces of the filter element can be converted between 226, 222, etc., and the lengths can be divided into 10 inches, 20 inches, 30 inches, 40 inches, etc. This device has the characteristics of simple operation, convenient use, and accurate measurement precision.

High-quality fiber filter elements, high-density activated carbon that can be converted with ID, KDF special microcrystalline carbon composite filter elements, high-tech high-energy nano-generated ceramics, post-bacteriostatic activated carbon filter elements, high-purity copper-zinc alloy composite microcrystalline carbon, Maifan stone + wooden fish stone composite filter elements, high-precision ultrafiltration membrane filter elements, and stainless steel high-magnetic filter elements.

There are mostly three types:
Air filter, which is located at the air inlet. Oil filter at the front end of the intake valve. It is on the oil pipeline, at the front end of the pipeline supplying oil to the main engine. Oil-gas separator, which is located in front of the exhaust end, generally inside the oil separation drum.
Some machines are equipped with a gas-water separator. It mainly depends on what kind of machine you have. Usually, the instruction manual will have relevant introductions.

Generally, for some substances, a filter bag alone can be sufficient. However, for other substances, it is necessary to select a suitable filter. Here's how to choose a filter: The larger the area and the lower the filtration rate, the smaller the resistance of the filter. Under the specific structural conditions of a filter, what reflects the filtration rate is the rated air volume of the filter. Generally, for the same cross-sectional area, it is desirable that the allowable rated air volume is as large as possible. And when operating below the rated air volume, the efficiency increases and the resistance decreases.

Manufacturers can also provide OEM production of filters of various specifications and materials, as well as filter cartridges, for middlemen, equipment manufacturers, foreign trade companies, etc. They can also provide services such as trademarks and packaging requirements that meet customers' needs. Increasing the filtration area is an effective means to extend the service life of the filter. Experience shows that for filters with the same structure and the same filter media, when the final resistance is determined, if the filtration area is increased by 50%, the service life of the filter will be extended by 70% to 80%.

When its service life is up, generally, the service life of the oil filter of a screw air compressor is only 1500 hours. If your oil filter has been in use for more than 1000 hours, it is recommended to carry out maintenance. If the operation interface is an electronic display screen, you also need to reset and clear the usage time of the consumables. Generally, there will be no problem after maintenance.

If it still shows that it is blocked, then it is likely that the oil pipeline is really blocked. You can observe the air pressure and oil pressure. Just before the air compressor is almost fully inflated and about to be in no-load operation (when the pressure is a little over 7 kg), observe the difference between the oil pressure and the air pressure. If the oil pressure is within 1 kg higher than the air pressure, it is considered normal. If it is much higher, you can confirm that the pipeline is blocked.

If it is determined that the pipeline is not blocked but the oil filter blockage is still indicated, then check whether the differential pressure switch beside the oil filter is broken. These are the few possibilities when the screw air compressor shows that the oil filter is blocked, and there are no others.