Silica dust clogging test equipment Silica Dust

automaticrespirator

Test equipment SILICA DUST is purposed for a silica dust test requirements on HEPA filters designed for powered air-purifying respirators (PAPRs) acc. procedure № RCT-APR-STR-0025 NIOSH. Test equipment consists of a silica dust chamber with anthropometric dummy human head, a breathing machine, a dust generator, measuring system for dust concentration in the chamber (aspirator), a cleaning air system from dust. The necessary test conditions are created in the silica dust chamber, and the breathing machine simulates human external breathing and creates a pulsating, sinusoidal-like airflow. An absolute filter captures all the dust that has passed through the HEPA filters during the test. As a result of the 4 hours test, the amount of dust that goes through the absolute filter is fixed, determined the total amount of leakage thus the resistance to constant airflow of the respirator after dusting is checked.