What is the basis for quality classification of filter elements?

answer:

The class the filter achieves for processing compressed air according to ISO 8573.1 quality class. Generally classified according to the size of solid contaminant particles, liquid water content, oil droplets, oil mist, and oil vapor content after filter element treatment.

How are the filter stages actually divided?

answer:

General filter properties can be divided into pre-filter, main filter, fine filter and activated carbon filter. Of these, the pre-filter generally filters particles with a diameter of 3-5 μm, the main filter generally filters particles with a diameter of 0.5-1 μm and a residual oil mist content of 1 ppm w/w, and the fine filter generally filters particles with a diameter of Filters 0.01μm particles and residual oil mist. Level 0.0 lppm w/w. Activated carbon filters are mainly used to remove odors and oil vapors (residual oil mist content as low as 0.003ppm w/w).

When are different filter grades applied?

answer:

Pre-filters are generally used after the compressor (aftercooler) and the application requirements are not high. Primary filters are commonly used in tools, engines, cylinders, etc. Fine filters are commonly used in painting, injection molding, instruments, control valves, gears, agitation, electronic component manufacturing, nitrogen separation, etc. Activated carbon filters are commonly used in food and pharmaceutical manufacturing, breathing air, gas treatment, etc.

Why should I buy filters together?

answer:

There is a misconception that most people think they can meet their requirements and save money by choosing a single filter that meets the processing accuracy according to the air quality they need. The required air quality is determined by the processing accuracy of the individual filters selected, but without the pre-treatment protection of the pre-subfilter, the high-precision filter elements clog quickly due to overload. The filter element needs to be replaced more frequently, which veiled the production cost.

Can filters lower the dew point of the air?

answer:

In principle, filters only remove solid and liquid particles (droplets), while water vapor and oil vapors are allowed to pass unhindered through the tortuous paths of the filter material. Therefore, it cannot be filtered by mechanical filters (except activated carbon filters). Basically, dryers are only used to lower the dew point temperature of the air to remove water and oil vapors. What is the relationship between filter efficiency and temperature?

answer:

The temperature of the oil and water in the compressed air affects the efficiency of the filter. for example:

At a temperature of 30 °C, five times more oil passes through the filter than at 20 °C. If the temperature rises to 40°C, ten times more oil will pass through the filter than at 20°C. Filters are therefore usually installed at the lowest temperature point in the compressed air system. 

What is the difference between domestic filter elements and imported filter elements?

answer:

Due to raw materials, equipment and other reasons, domestic filter elements always lag behind imported filter elements in terms of filter materials and processing technology. Due to the lack of quantitative reliable analysis, backward detection methods and devices fail to improve the quality of household filter elements. Compared to imported filter elements, domestically produced filter elements are generally coarse and bulky.

What filter options do you have? answer:

The optional part of the filter typically includes:

Internal auto drain, external auto drain, differential pressure gauge, differential pressure gauge, electronic differential pressure gauge, liquid level gauge.

What are the filter options used for?

answer:

Optional filter internal and external auto drains automatically drain a mixture of oil, water and dust filtered by the filter element outside the filter, reducing the impact of human factors on system filtration efficiency . Differential pressure gauges, differential pressure gauges, and electronic differential pressure gauges are used to determine when to replace the filter element. Level gauges are used to indicate the amount of entrained contaminants such as oil, water, and dust. (The operation status of the internal auto drain can be monitored and manual drain can be induced). 

Lingyu coalescing compressed air filter for moisture removal