Guangzhou Longhuilong Filter Co., Ltd. is a subsidiary of Huilong Filtration Group (HL Filter). During more than 20 years, HL Filter has progressed to a leading brand in the field of liquid filtration systems. Huilong Filtration Group includes Guangzhou Longhuilong Filter Co., Ltd., Guangzhou Aikang Filter Facility Co., Ltd. and Suzhou Huilong Purifying Filter Co., Ltd. Both of Guangzhou Longhuilong Filter Co., Ltd. and Suzhou Huilong Purifying Filter Co., Ltd. are ISO9001 certified for ...