new design double filter gas mask chemical espirator np 306

DENTAL EXAMINERS PROCEDURES MANUAL

cotton roll (filter element) is not damp. If needed, replace the cotton roll, filter, or filter tube. 3.4.5.2 Changing the filter element (cotton roll) The filter element of the air syringe should be changed annually and also if it becomes damp. 1. Turn off the air to the compressor and bleed off