Summary
As a primary efficiency filter, it adopts a light flat panel structure composed of dampproof and hot temp tolerant double-paperboard framework, metal net, and filtering materials. Light, tight and reliable structure, convenient replacing, cheap price, 22mm, 44, and 95mm thick filters are available.

Application
* Filtering of large air-compressor for the environment with heavy dust and strong wind�F
* Preliminary filtering of air-conditioning and ventilation system;
* Filtering of centralizing ventilation system for the clean room;
* It can be applied to the ventilation system of ordinary industrial plant, meeting the ordinary requirements towards cleansing air. Features
* Since its external framework is high temp paperboard, it is of good fireproof performance; * Its filter class is subject to G4(EN779), its corresponding average weighted filtering efficiency is 90��95%�F
* It��s filtering material is a special mixture of non-woven cloth and compoundfibre, featuring puff, big capacity of dust collecting, and low initial pressuredrop.
* Outline border media: Cardboard
* Max temperature 93�J