Airvate Blog

In the process of starting up a new baghouse dust collection system, we found this interesting pressure gauge on the PD blower; the blower was not turned on yet, but its pointer was sitting on the other side of the stop pin. Nobody knew how this happened and it had to be replaced.  If not carefully checked, the error was hard to spot. Figure 1 Pointer of the pressure gauge sits on the wrong side of the stop pin Leak Test, Air Balancing, Trouble-shooting, and System Evaluation services by Airvate Dye test for bag/cartridge leak  Dust collection system and industrial ventilation system Testing and Air Balancing Technical services: field survey and dust collection system audit / evaluation and trouble-shooting New system start-up Dust sample analysis Dust collector selection and sizing: baghouse, wet scrubber, cyclone, settling chamber, drop-out box, etc.

  When we inspect a dust collection system, we always work on the PD blower (positive displacement blower) if equipped with one. Figure 1 a PD blower with intake filter taken out Intake filter Nearly every time an intake filter was taken out,  it was dirty and covered with dust or dirt. Since the intake filter is normally shrouded inside of a cover, it is not visible and is forgotten or ignored easily by maintenance guys or other service contractors. If it is a paper or felt element, we will tell the customer when to replace it, or if it is a wire mesh element, we will clean it with lukewarm water, and if there is oil on it, we will wash it with mild detergent. Because of the tight clearances used in the design and manufacturing of the PD blowers, they require filtered intake air. Proper maintenance of the intake filter will help insure a long service life for the PD blower. Consequently, a clogged intake filter will cause poor performance and overheating of the PD blower. Her...

  One customer told us that their dust collection system had a very weak suction on the grinding process line, and we went to their workshop on-schedule to do troubleshooting.  Introduction of the dust collection system The dusty air from the plastic grinder first ran through a cyclone and the separated dust from the cyclone directly went back to the process; the airflow with fine particles from the cyclone went to a cartridge dust collector, and then the filtered air was released to outside of the building. Since the plastic dust is combustible, an explosion panel and a vent duct were installed on the dust collector, and a non-return valve on the ductwork just in front of the dust collector inlet. The cartridge dust collector was equipped with a pulse jet cleaning system controlled by a Photohelic pressure gauge. The Photohelic Gauge measures the Differential Pressure and provides the capability for “on-demand” cleaning in conjunction with a Timer Board. Troubleshooting proce...