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Filter PL420 can't replace filters PL421

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MERV 8 Pleated Medium Efficiency Filters

MERV 8 Pleated Medium Efficiency Filters

MERV 8 Pleated Medium Efficiency Filters MERV 8 pleated medium efficiency filters are widely used in various air filtration systems due to their excellent performance and cost - effectiveness. These filters are designed with a MERV (Minimum Efficiency Reporting Value) rating of 8, which means they can effectively capture a wide range of airborne particles. They can trap dust, pollen, mold spores, and even some pet dander, providing cleaner air for indoor environments. The pleated design of these filters increases the surface area, allowing for better airflow while maintaining high filtration efficiency. This design also helps to reduce pressure drop, which means the air can pass through the filter more easily without putting too much strain on the HVAC system. As a result, the energy consumption of the system can be reduced, leading to lower operating costs over time. These filters are commonly used in residential and commercial HVAC systems, such as central air conditioning and heating units. They are also suitable for some industrial applications where moderate air quality control is required. By using MERV 8 pleated filters, you can improve the indoor air quality, reduce the risk of allergies and respiratory problems, and create a healthier and more comfortable living or working environment. WhatsApp / Wechat: +86 18965520297 WhatsApp / Wechat:+86 18144082725 Email:  Sales@filters-king.com

Filter PL420 can't replace filters PL421
2019-06-21

In the past, the PL420 was used as the first primary filter for the fuel tank girders. There is no pressure. The common rail is pressurized, and the PL420 is under negative pressure.


Before the appearance of the electronic pressure pump, the transparent cup is very safe, there is no pressure damage to the transparent cup, but with the advent of the electronic pressure pump, the engine's two coarse filters change from negative pressure to 4 positive pressures or even greater pressure. The old-fashioned PL420 transparent cup has the risk of oil leakage.


Some OEMs changed the PL420 on the engine to the PL421 without a cup. However, some OEMs did not consider this problem. They still loaded the PL420. (There are now Delong) there are design risks.


It is recommended to use the filter PL421 for models equipped with an electronic pump.


Filters PL420 and PL421, we can provide, if you need, please feel free to contact us.


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