SR fans are thought to be employed in applications that require low noise emission levels, like radiators and engine coolers.
21.65 -43.31 ″ 
20°-37.5° T -40° F to +248° F° SR impellers are manufactured assembling sickle profile blades, with a light aluminum alloy hub. The impellers are thought to be employed in applications that require low noise emission levels. The impellers can be assembled with 3/5/6/8 blades, using TM family hubs for 5/9/12/16 blades. Blades have variable right setting angles ranging from 20° to 37,5°, and can produce a sucking or blowing air flow.
SR impellers are manufactured assembling sickle profile blades, with a light aluminum alloy variable pitch hub. The impellers can be assembled with 3/5/6/8 blades, using TM family hubs for 5/9/12/16 blades. Blades have variable right setting angles ranging from 20° to 37.5°, and can produce a sucking or blowing air flow.
11.81 - 50.00 ″ 20°-45° T -40° F to +248° F° 
9.06 - 35.67 ″ 25°-50° T -40° F to +284° F° 
9.06 - 29.53 ″ 20°-50° T -40° F to +284° F° 
21.65 -43.31 ″ 20°-37.5° T -40° F to +248° F° 
9.06 - 31.65 ″ 25°-50° T -58° F to +356° F° 
11.81 - 43.39 ″ 25°-50° T -40° F to +248° F° 
17.72 - 50.47 ″ 25°-50° T -58° F to +572° F° 
22.44 - 59.84 ″ 15°-35° T -40° F to +248° F° 
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