1, to keep the device environment cleaning, cleaning equipment before the ventilation pipe, the pipe inside the garbage, dust, rust and other clean-up;
2, the device must be unpacked in the field before the packaging, the appearance of inspection, check the contents of the filter paper, sealant and frame for damage; side length, diagonal and thickness dimensions meet the requirements; frame with or without burr and rust ;
3, when the device is prohibited to directly touch the filter paper by hand, to avoid damage;
4, to ensure that the arrow on the frame and the direction of the same air;
5, if it is a vertical device, it should be noted that the crease of the direction of the filter paper should be perpendicular to the ground;
6, after the installation must be thoroughly clean the sanitation.
