With 20 years' continuous efforts and innovations, LENGE has developed into the largest-scale, highest-specialized and technology-advanced purification equipment manufacturers in China. We introduced the full-automatic ultrasonic welding production line for bag air filter from German, and the automatic production lines for mini-pleat HEPA, deep-pleat air filter, and folded filter cartridge from Korea. Also we introduced the EU standard EN1822 full-automatic testing system for HEPA and the EU standard EN779 and US standard ASHRAE52.2 testing system for pre-filters from German.

We established the international standard laboratory for filter cartridges' testing and verification to help the customers select the filters according to the technological characteristics. Various testing and verification services are provided by customers’ requirements.

With our products are certificated by ISO9001 and ISO14001 as well as first authorized by US FDA in China, We are awarded as Jiangsu Private Technology Enterprise, Three-star Digital Enterprise, and Scientific and Technological Innovation-oriented Enterprise. Also be recognized as “Excellent Supplier” by many domestic large companies.

Rome wasn’t built in one day, with 20 years’ brand commitment, our brand strength, from the inside out, forged into the invincible culture.