Just lay the air filter flat on the floor or on the table and sprinkle some water on the filter paper

(1) If the filter paper seeps into the water within 5 minutes, it is the air filter made of cotton pulp paper (fake filter paper). It can't be used. This kind of air filter is mostly produced in Hebei Province. There are a few people who are greedy for cheap in the air compressor industry.

(2) If the filter paper permeated in 2-5 hours is made of low-grade wood pulp paper, it can be used, but it will reduce the gas production efficiency of the air compressor (more power consumption and less gas production), resulting in more power consumption of the air compressor. Because the price of air filter made of this kind of filter paper is relatively low, and it can also be used together, so the air filter made of this kind of filter paper is the mainstream in the air compressor industry, and the vast majority of air compressor stores are selling this kind of air filter.

(3) If the filter paper only seeps in after 12-15 hours, it belongs to the better filter paper (medium filter paper). Generally, the domestic complete machine factory with better quality uses the air filter of this kind of filter paper as the original consumables.

(4) If the filter paper doesn't seep in for 24 hours, it's definitely superior (high-grade filter paper). Usually, the high-grade machine factory chooses this kind of filter paper air filter as the original consumables.

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