How to choose compressed air filter

2022-08-14
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How to choose compressed air filter

sometimes, the quality problem of compressed air cannot be solved by connecting a device to the compressed air supply station. In order to obtain the most appropriate mechanical efficiency and product quality, in the internal air supply system or in a separate department, compressed air users need to have an overall understanding of the compressed gas quality they will obtain. ISO8573 cannot answer this question, which requires AAPC compressor, compressed air and vacuum technology trade association to provide sufficient suggestions to compressed air users

provide on demand to minimize particles

the principle provided by ISO standard is "provide on demand to minimize particles". Because in addition to technical requirements, AAPC member enterprises have carefully considered various issues when drafting standard documents, even from the perspective of user costs. Of course, the investment cost is an important part: high compressed air quality means expensive purification equipment or high-quality purification equipment. However, what is more important is the operating cost of the equipment

compressed air treatment consists of several parts (pre filtration by filter or drying filter combination, secondary filter/concentrator and concentration processing, etc.). Product experts can help you plan a complete solution according to the pressure testing machine of Jinan experimental machine factory, also known as the compressive strength testing machine. Those who want to choose the filter by themselves must first familiarize themselves with the functional data forming characteristics related to the filter, and be able to set unified initial conditions (pressure, flow, surrounding and inlet temperature, relative humidity, etc.)

is oil-free compressor better

when dealing with the problems of pressure dew point, retention rate and residual oil content, people will soon find that "compressed air quality" is a very complex thing. Sometimes, some users may prefer the most basic and simple choice - to use oil-free compressor. Their idea is that using oil-free compressor at least the residual oil content will no longer be a problem to be considered, which not only simplifies the treatment equipment, but also makes it possible to obtain compressed air more economically

in fact, the oil-free compressor just doesn't inject oil into the compression chamber, but the bearings and other parts of the compressor need lubrication. The oil of this kind of compressor can also reach the compressed air. Inhaled air is also easy to be polluted (remember, the average dust content of a single item is 20mg/m3), so purification treatment is essential anyway. Especially when the compressed air produced by oil-free compressor is hotter than that produced by oil lubricated compressor, it will adhere to more wet dirt particles. In a word, no matter choosing oil-free compressor or oil lubricated compressor, efficient purification process is necessary. When to replace the filter element

when it comes to filter efficiency, we must pay attention to the replacement cycle of the filter element. Many users believe that extending the working life of the filter element can reduce costs. On the contrary, the filter element full of dirt particles will increase the pressure of different parts of the compressor, and the energy consumption of the whole compressed air station will also increase. Therefore, unless some new solutions such as filter environment monitor with network help function are applied, we should always pay attention to the change of filter pressure. When the sum of energy cost and filter cost reaches the minimum, it is the best time to replace these filters. In other words, if the cost of filter element material is lower than the estimated energy cost of the old filter element, this is the best time to replace the filter element

working principle of compressed air filter of Nanjing ruishiji International Trade Co., Ltd.

1. How to install the first stage filter device of the filter when carrying compressed air containing harmful substances such as dust, oil, rust and water into the extensometer of the compressed air testing machine

2. When compressed air passes through the first stage cylindrical eye filter element, it will produce coalescence effect, and the larger particles will be adsorbed on the filter material, and the water will condense into larger droplets. 3. When entering the separation chamber, the speed of compressed air slows down, making the particles gather again, and the water mist condenses on a honeycomb water collector again

4. The water carrying impurity particles flows to the drainage device along the bottom and is discharged through the automatic or electric drainage valve

5. More than 95% of the water droplets, oil and large particles in the compressed air have been filtered out by the first filter element, and the compressed air that can protect the sensor after the first filter enters the second filter element

6. When compressed air is filtered through the fiber made of special cotton in the second stage, thousands of small vortices will be generated. At the same time, the compressed air will be accelerated dozens of times. The vortex center is like a tornado, forming a vacuum state. The water droplets that are not filtered in the first stage are vaporized, converted and filtered again. At the same time, particles as small as 5 microns are also completely removed by the second stage

7. After two-stage filtration, clean and dry compressed air without dust, rust, oil and water droplets can be achieved to ensure the normal operation of pneumatic equipment and prolong the service life of pneumatic equipment

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