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Technical Specification Sheet

Document No. 149-496

August 27, 2014

Siemens Industry, Inc.

Page 1 of 23

Silencer for Siemens Venturi Air Valves

Description

The Venturi Air Valve Silencers are designed to be a

practical solution for controlling sound when coupled

with Siemens Venturi Air Valves.

Packless silencers trap sound within tuned resonator

chambers that lie between a perforated metal liner

and a solid metal casing.

Absorptive silencers use a fiberglass acoustic media

encapsulated by a thin Tedlar® film liner. This film

liner protects the acoustic media from moisture and

airborne contaminants that may be present in duct

systems.

Silencers are available in following sizes:

 14” Packless Silencer

 18” Absorptive Silencer

 36” Packless or Absorptive Silencer

Each of these silencers is available in a form

compatible with single, dual, and triple Siemens

Venturi Air Valves.

Features

 Polymer Film (Tedlar®) Encapsulated Fiberglass

Sound Absorbing Media

 Available in 22 Ga Galvanized Steel, 24 Ga 304

Stainless Steel, 24 Ga 316 Stainless Steel

Construction

 Available with slip or flanged ends

 For single-body valve sizes, circular silencer

 For multi-body valves sizes, rectangular silencer

 All materials used meet or exceed flame spread

classification of 25 and smoke development rating

of 50 when tested in accordance with ASTM E84,

UL723 and NEPA255.

Applications

 Hospital patient isolation wards

 Pharmaceutical manufacturing

 Research laboratories

 General room ventilation

Specifications

Construction

Siemens packless silencers consist of a solid metal

casing and perforated resonating metal liner.

Siemens absorptive silencers consist of acoustic

fiberglass media encapsulated in a polymer (Tedlar®)

film liner, with acoustic standoff separating the media

from the perforated internal liner and solid metal

casing.

Material

 Galvanized Steel

 304 Stainless Steel

 316 Stainless Steel

Liner (Absorptive Silencers Only)

A thin Tedlar® film is wrapped around the fiberglass

media to provide a barrier against elements that may

be found in the air stream. To ensure that acoustic

performance is maintained, a ½” acoustic stand-off is

placed between the perforated metal and the film

liner.

Summary of content (23 pages)

PAGE 1
Technical Specification Sheet Document No. 149-496 August 27, 2014 Silencer for Siemens Venturi Air Valves  For single-body valve sizes, circular silencer  For multi-body valves sizes, rectangular silencer  All materials used meet or exceed flame spread classification of 25 and smoke development rating of 50 when tested in accordance with ASTM E84, UL723 and NEPA255.
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Connections NOTE: The 14” long packless silencers were designed so that the silencer OD is slightly oversized (~1/8”) compared to the venturi OD. It was designed this way so that the venturi valve can slide into the silencer to be attached removing the requirement of the collar. The single body 18” and 36” silencers have OD’s that match the OD’s of the venturi valves. They would need to be attached using a collar, or drawband in the field. Figure 1. LGA ACX Absorptive Silencer: 18” Length.
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Figure 2. LGA ARX Absorptive Silencer: 18” Length. Siemens Industry, Inc.
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Figure 3. LGA ACX Absorptive Silencer: 36” Length. Page 4 of 23 Siemens Industry, Inc.
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Figure 4. LGA ARX ABSORPTIVE SILENCER 36” LENGTH. Siemens Industry, Inc.
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Figure 5. LGA PCX PACKLESS SILENCER 36” LENGTH. Page 6 of 23 Siemens Industry, Inc.
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Figure 6. LGA PRX PACKLESS SILENCER 36” LENGTH. Siemens Industry, Inc.
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Figure 7. LGA PCX PACKLESS SILENCER 14” LENGTH. Page 8 of 23 Siemens Industry, Inc.
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Figure 8. LGA PRX PACKLESS SILENCER 14” LENGTH. Siemens Industry, Inc.
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Table 1. Venturi c/w 18" Polymer Lined Absorptive Silencer (Supply) Discharge Sound Air Flow Unit Size 8 10 12 Page 10 of 23 Sound Power Levels Lw. dB, RE 10-12 Watts 250 Pa (1.0" W.G.) 500 Pa (2.0" W.G.) Octave Band Octave Band 150 Pa (0.6" W.G.) Octave Band 750 Pa (3.0" W.G.
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Table 1. Venturi c/w 18" Polymer Lined Absorptive Silencer (Supply) Discharge Sound Air Flow Unit Size 210 212 312 Sound Power Levels Lw. dB, RE 10-12 Watts 250 Pa (1.0" W.G.) 500 Pa (2.0" W.G.) Octave Band Octave Band 150 Pa (0.6" W.G.) Octave Band 750 Pa (3.0" W.G.
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Table 2. Venturi c/w 18" Polymer Lined Absorptive Silencer (Exhaust) Inlet Sound. 150 Pa (0.6" W.G.) Air Flow Unit Size 8 10 12 Page 12 of 23 250 Pa (1.0" W.G.) Octave Band 500 Pa (2.0" W.G.) Octave Band 750 Pa (3.0" W.G.
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Table 2. Venturi c/w 18" Polymer Lined Absorptive Silencer (Exhaust) Inlet Sound. Air Flow Unit Size 210 212 312 150 Pa (0.6" W.G.) 250 Pa (1.0" W.G.) 500 Pa (2.0" W.G.) Octave Band Octave Band Octave Band 750 Pa (3.0" W.G.
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Table 3. Venturi c/w 36" Tedlar Absorptive Silencer Radiated Sound. Sound Power Levels Lw. dB, RE 10 150 Pa (0.6" W.G.) Air Flow -12 Watts 250 Pa (1.0" W.G.) Octave Band 500 Pa (2.0" W.G.) Octave Band 750 Pa (3.0" W.G.
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Table 3. Venturi c/w 36" Tedlar Absorptive Silencer Radiated Sound. Sound Power Levels Lw. dB, RE 10 Air Flow Unit Size 312 -12 Watts 150 Pa (0.6" W.G.) 250 Pa (1.0" W.G.) 500 Pa (2.0" W.G.) Octave Band Octave Band Octave Band 750 Pa (3.0" W.G.
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Table 5. Venturi c/w 36" Tedlar Absorptive Silencer (Exhaust) Inlet Sound. Sound Power Levels Lw. dB, RE 10 Air Flow Unit Size Inlet Area 8 0.349 10 12 210 212 Page 16 of 23 0.545 0.785 -12 Watts 150 Pa (0.6" W.G.) 250 Pa (1.0" W.G.) 375 Pa (1.5" W.G.) Octave Band Octave Band Octave Band 750 Pa (3.0" W.G.
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Table 5. Venturi c/w 36" Tedlar Absorptive Silencer (Exhaust) Inlet Sound. Sound Power Levels Lw. dB, RE 10 Air Flow Unit Size Inlet Area 312 -12 Watts 150 Pa (0.6" W.G.) 250 Pa (1.0" W.G.) 375 Pa (1.5" W.G.) Octave Band Octave Band Octave Band 750 Pa (3.0" W.G.
PAGE 18
Table 6. Venturi Air Valve c/w 36" Packless Silencer Radiated Sound. Sound Power Levels Lw. dB, RE 10 Inlet Area 212 312 cfm Watts 150 Pa (0.6" W.G.) 250 Pa (1.0" W.G.) 500 Pa (1.0" W.G.) Octave Band Octave Band Octave Band Air Flow Unit Size -12 750 Pa (3.0" W.G.
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Table 8. Venturi c/w 36" Packless Silencer (Exhaust) Inlet Sound. Sound Power Levels Lw. dB, RE 10 -12 Watts 150 Pa (0.6" W.G.) 250 Pa (1.0" W.G.) 375 Pa (1.5" W.G.) 750 Pa (3.0" W.G.) Air Flow Octave Band Octave Band Octave Band Octave Band Unit Size Inlet Area cfm L/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 8 0.
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Table 9. Venturi Air Valve c/w 14" Packless Silencer Radiated Sound. Sound Power Levels Lw. dB, RE 10 150 Pa (0.6" W.G.) Air Flow Unit Size 8 10 12 210 212 312 Page 20 of 23 Inlet Area -12 Watts 250 Pa (1.0" W.G.) Octave Band 500 Pa (2.0" W.G.) Octave Band 750 Pa (3.0" W.G.
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Table 10.Venturi Air Valve c/w 14" Packless Silencer (Supply) Discharge Sound. Sound Power Levels Lw. dB, RE 10 8 10 12 210 212 312 Watts 150 Pa (0.6" W.G.) 250 Pa (1.0" W.G.) 500 Pa (2.0" W.G.) Octave Band Octave Band Octave Band Air Flow Unit Size -12 cfm L/s 2 3 4 5 6 7 2 3 4 750 Pa (3.0" W.G.
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Table 11. Venturi Air Valve c/w 14" Packless Silencer (Exhaust) Inlet Sound. Sound Power Levels Lw. dB, RE 10 150 Pa (0.6" W.G.) Air Flow Unit Size 8 10 12 210 212 312 Page 22 of 23 250 Pa (1.0" W.G.) Octave Band -12 Watts 500 Pa (2.0" W.G.) Octave Band 750 Pa (3.0" W.G.
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Order Configuration Silencer Part Number Configuration L G A L G A P A P A P C C C R R X 3 6 S 1 6 R D G P Sample Part Number Type Absorptive, Circular Packless, Circular Absorptive, Rectangular Packless, Rectangular X X X X 1 3 1 Length in Inches Absorptive Only Absorptive and Packless Available Packless Only 8 6 4 End Fittings Flanged Ends Slip Ends F S 0 0 1 1 1 1 1 1 1 6 8 0 2 4 0 2 4 2 R R R R R 2 2 2 3 Inlet Size 6" Diameter, Circular 8" Diameter, Circular 10" Diameter, C