SPECIFICATION DATA
Sample
Specification Sheet for VA Inline Silencers
Silencer to be Model
( ) Inline Silencer manufactured by Innovative
Metal Industries, Inc., San Bernardino, California.
Unit to incorporate ( )
spiral modules each having an Oxel® four bladed ( )
degree spiral attenuator made up of an absorbing layer, a barrier and
another absorbing layer. The blades are to be held in place by a matrix of
spiral rods.
CONSTRUCTION:
16 gauge minimum (0.060" thick)
carbon steel sheet per ASTM A366 all welded construction per MIL-STD-1595A.
The exterior wrap is to be 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. Attenuation spirals to be constructed from stainless steel
per ASTM-A240.
Attenuation materials to be
fiberglass based acoustical insulation bonded to 26 gauge (0.016" thick)
acoustical lead sheet. All exposed fiberglass face to be 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.
AIRFLOW SPECIFICATIONS:
Unit to provide a minimum of
( ) CFM of air flow at no more than ( )" w.g. pressure
drop across silencer.
ATTENUATION SPECIFICATIONS:
Silencer to provide not less
than the following attenuation:
