Fuel Filter Cross Reference

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Filter PL420 can't replace filters PL421

Filter PL420 can't replace filters PL421

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.

Quantity of employees


2008.6 ——Company was founded in China

2009.8 ——Factory was founded in Wenzhou

2010 ——Export Branch Office was Opened in XIAMEN City

2012 ——Attend Shanghai Frankfurt exhibition

2014 ——"RUIQIAN" was Registered

2015 ——More than 300 Customers from about 50 Countries

2016 ——"AYREST" was Registered

2016 ——Attend Moscow Frankfurt exhibition

2017 ——Plant more to new Build, More than 5000 Square Meter


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