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FAN-PEDIA SPARK RESISTANT

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Twin City Fan & Blower CONSTRUCTION
©2017 TCF.COM
CENTRIFUGAL FANS

AMCA Type A

OVERVIEW
Type A provides the highest degree of spark resistance,
requiring that all fan components in the airstream be

Typical Non Ferrous Materials constructed of a non-ferrous material and that they be
-Aluminum assembled in a manner such as to reduce the possibility
-Aluminum/Nickel/Bronze of contact between any stationary and rotating
-Monel component.
-Copper
-Brass NON-FERROUS AIRSTREAM CONSTRUCTION
-Bronze
- HOUSINGS / FRAMES
- WHEEL / IMPELLER (WELDED HUB)
- INLET FUNNEL
- SLEEVE (AS SHOWN)
- INTERIOR FASTENERS
(HUB SET SCREWS TO BE STAINLESS STEEL - FLUSH WITH HUB)

STEEL CONSTRUCTION
- PEDESTAL (BOLTED ON)
- SHAFT
- SHAFT LOCKING COLLARS

FAN MODIFICATIONS
Bearing Dowel Pins - RESTRAINED BEARINGS
(first choice) (BEARING DOWEL PINS OR BEARING STOP BLOCKS)

NOTE: BEARINGS NOT ALLOWED IN AIRSTREAM

Construction varies by model.

Bearing Stop Blocks 79