Main operational principle of filter type respirator and canister series products is to seal for cutting off outside air and protecting nose-mouth face. It is used to protect breath organ,eyes and face from toxic,biological reagent and dust-borne radioactivity hurt. Respirator divide into direct type and duct type according to the structure.

the choice of the canister type depends on your particular working environment and individual requirements.
the canister is filled with quality active carbon and high efficiency filter paper which is full of better protective funcitons against various toxic smoke, toxic fog, toxic gas, germs, radioactive dust and particle gasoloid with advantages of small resistance and light weight.