Construction Data for FGR Series Silencers

Standard Construction:

Exterior wrap of unit is constructed from 16 gauge minimum (0.060" thick) carbon steel sheet per ASTM A366 all welded construction per MIL-STD-1595A. The exterior wrap is treated with a 1.5 pound per square foot layer of acoustical dampening compound and then covered with a fiberglass acoustical insulation bonded to a high velocity scrim cloth per Oxel^® 919 treatment. The spiral matrix is constructed from stainless steel per ASTM-A240.

Attenuation materials are fiberglass based acoustical insulation bonded to 26 gauge (0.016" thick) acoustical lead sheet as a septum. All exposed fiberglass face is bonded with a fiberglass scrim cloth per Oxel^® 919 treatment to a minimum strength per square inch of 80 lbs. warp and 70 lbs. filler, packed under a minimum of 5% compression.  Fiberglass based insulation is vermin and moisture proof with a flame-spread maximum of 25.

Alternate Construction Materials:

Stainless steel (300 & 400 series), FRP or aluminum (5052, 6061 & 2024).

Internal spiral holders can be PVC coated.

Other blade septums include copper sheet, loaded vinyl sheet, and stainless.