Spark Resistant Centrifugal Fan

In most facilities, explosive atmospheres do not persist. Such as paint finishing lines, chemical mixing and storage areas, grain handling facilities, woodworking plants and plastics processing operations. This risk mostly happens during loading-unloading cycles, process interruption and cleaning. For those types of occasional risks, using a fully ATEX, ExD motor certified fan can add high capital costs and certification complexity. But engineers should avoid using a fan with a completely ordinary or ferrous steel impeller in such a hazardous situation. which can be the cause of sparks if the iron impeller moves sideways and rubs against the iron housing.

A Spark Resistant Centrifugal Fan is engineered with compliance to AMCA Standard 99-0401. That almost eliminates any chance of mechanical sparks without engineering and procurement costs for full ExD motor installation. These fans are classified in 3 different protection levels based on the specific risk level of any plant or installation.

AMCA Type A: All the airflow components, like the impeller, housing and inlet are made entirely of non-ferrous aluminum alloy, FRP or Monel. Impeller and shaft mechanically restrained. Highest protection level for normally hazardous airstreams.

AMCA Type B: This unit comes with a non-ferrous shaft entry ring and an impeller made primarily of non-ferrous materials (usually aluminum alloy). A ferrous hub, shaft and hardware are permitted with a strict condition. This means that there must be no ferrous-to-ferrous friction under any circumstances while the fan is running. This unit is mostly suitable for industrial paint booths, dust and grain processing and solvent handling.

AMCA Type C: The entire structure of this unit is made of iron. Our experts design this unit impeller with clearances and mechanical restraints. That can prevent ferrous contact during any shift condition. Recommended to use for entry-level protection for non-normally hazardous environments.

The Spark Resistant Centrifugal Fan belongs to our high-efficiency Y-series category. It can provide 80–90% peak efficiency without any performance loss even with a spark-resistant construction. It has almost the same operating abilities like airflow and static pressures as other Y-series exhaust fans do. The only difference is the materials and motors that we used in this system to cut the unnecessary cost. An ATEX Zone 2 Category 3G motor option is also available based on additional European regulations and standard (IE3) motors are used for Zone-2 equivalent applications. Engineers and managers can tailor the fan materials and motors to meet the requirements of specific gas groups, dust classifications and process conditions. That's the way they can ensure better safety while managing costs.