ZHUAN LV is one of the world's largest suppliers of filtration and separation products to the oil, gas, chemical, food, beverage and pharmaceutical industries. In 1999, Shuang King Filtration Technology Co., Ltd(Zhuan Lv original factory) was set up and start oil filter products manufacture, Shuang King is mainly focus on oil and gas filtration product's research, development and production, the featured products include filter element for hydraulic system, lube system; coalescing and separation filter cartridge for fuel and gas system.

In 2002, Shuang King participated in overseas filter product bidding, which is request to supply all kinds of filter products to new power plant, as there is big demand of air prefilter, medium efficiency air filter and high efficiency air filter etc, to guarantee high quality standard of the filters, Shuang King invested a professional air filter factory and take 10% share in it to produce all kinds of air filters for power plant, steel plant, commercial building and so on.after 10 years development, our air filters has replaced brands like Camfil, AAF, Donaldson, Parker successfully in overseas market by high quality and economy cost.