HL Filter - The Leading Filter Bag Manufacturer In China Suzhou Huilong is one of the leading liquid and air filter manufacturer in China, providing filter solution of manufacturing process industry of Chemistry,petrifaction, paint, ink, beverage, metallurgy and automobile, with factory located in Datang Industry Park ,Qiandeng Town, Kunshan city. Based on comprehensive process knowledge, we have been devoting ourselves to developing, designing and researching professional filter products suc