Choice of filter

Air filter is mainly responsible for removing particulate impurities in the air

1. First of all, you should take a look at the filter paper, it is best to blow it directly with your mouth, see the air permeability, and then see if the filter element has a scratch, because in the production process, the filter paper may be accidentally scratched, if it is scratched, it will leak, in the good filter paper is not good, because there is no filter. It's very damaging to the engine.

2. Look at the light to see whether the filter paper is uniform, whether the transmittance is good, whether the surface finish of the filter paper is good, the filter paper is evenly and carefully observed against the light, the transmittance is good, the surface finish is good, indicating that the main difference between the filter paper filtration accuracy and the air filter with good air permeability is wood pulp paper, mainly there are many kinds of non-pulp paper, HV full-glue semi-glue curing paper snowflake paper... Good wood pulp paper is not only waterproof, breathable will also be very good, more knowledge is very necessary。