Spark Resistant Construction

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Fan applications with airstreams of explosive or flammable particles or gases require spark resistant system components for the safe handling of such airstreams. Spark Resistant Construction (SRC) is intended to minimize the potential for any two or more fan components to generate sparks within the airstream by rubbing or striking during operation. nyb can build fans to meet AMCA SRC specifications, NFPA containment standards, and ATEX requirements.

The three most common types available are AMCA A, AMCA B, and AMCA C. AMCA A (Airstream) SRC includes all airstream parts constructed of a spark-resistant alloy. AMCA B (Wheel) SRC includes the fan wheel constructed of a spark resistant alloy and a buffer plate around the housing shaft-hole opening. AMCA C (Buffer) SRC includes a spark resistant alloy buffer affixed to the housing interior adjacent to the wheel back-place, a spark resistant alloy inlet cone, and a buffer plate around the housing shaft-hole opening.

For more information on the full meaning and limits of spark resistant construction, refer to Engineering Letter 15.

Design Features:

Fan Types:
Airstream Type SRC
Wheel Type SRC
Buffer Type SRC
*Note- not all types available on every fan.

Components:
Ductwork
Dampers
Filter Devices
Heating or Cooling Coils

Available Materials of Construction:

Nonferrous Alloys such as:
Aluminum 5052 and 6061
Brass CDA 360
Bronze CDA 958
Copper CDA 110 or 122
Monel 400 Shafting

Fan Designs:

Duct Fans
Tubeaxial Fans
Vaneaxial Fans
Vaneaxial Fixed Pitch

Class I-III SWSI
Class IV SWSI
HPBC Fans
BC Fans
Compact Pressure Blowers
BC Pressure Blowers
Pressure Blowers
General Purpose Fans
Square Fans
RTS Fans
Compact GI Fans
Series 20 GI Fans
Series 30 Fans
Series 45 Fans
Plug Fans

 

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