Noise absorber

Overview
High Temperature Acoustic Pillow for Gas Turbine Exhaust Silencers is a custom-made acoustic insulation component designed for industrial exhaust silencers, gas turbine exhaust systems, splitter baffles and high-temperature noise-control equipment. The pillow construction securely contains heat-resistant fibrous insulation while allowing sound energy to enter the absorptive core.

Product summary
Each acoustic pillow can be manufactured according to required length, width, thickness, density and silencer cavity dimensions. Core materials, outer fabrics, reinforcement layers and stitching systems can be selected according to operating temperature, exhaust gas velocity, acoustic performance and installation requirements. Custom sizes and constructions are available for OEM production, replacement projects and industrial silencer maintenance.

Typical Applications

• Gas turbine exhaust silencers
• Industrial exhaust silencers
• Exhaust stack silencers
• Splitter silencers
• Acoustic baffles
• Power generation exhaust systems
• Industrial duct silencers
• High-temperature ventilation systems
• Turbine exhaust systems
• Noise-control enclosures and acoustic panels

Custom Construction
Available customization includes:

• Custom length and width
• Custom pillow thickness
• Different acoustic core densities
• Heat-resistant fibrous core materials
• Fiberglass fabric outer covers
• Silica fabric outer covers
• Stainless steel wire mesh reinforcement
• High-temperature sewing thread
• Multiple protective layers
• Special shapes for existing silencer cavities

Acoustic Core Materials
Possible core materials include:

• Fiberglass insulation
• High-temperature glass fiber
• Silica fiber materials
• Ceramic fiber materials
• Other heat-resistant acoustic insulation fibers

Protective Outer Layers
Outer envelope options include:

• Fiberglass cloth
• Silica fabric
• High-temperature textile layers
• Stainless steel wire mesh
• Additional erosion-resistant reinforcement

Custom Size and Shape
Each exhaust silencer may use different baffle designs; pillows are normally manufactured according to drawings, dimensions or existing samples. Important dimensions include pillow length, pillow width, pillow thickness, baffle cavity dimensions, required compression and edge/corner geometry. Rectangular, narrow strip and other custom shapes can be produced.

Temperature Considerations
The allowable operating temperature depends on the selected core material, outer fabric, reinforcement layer and sewing system. Designs should be based on normal operating temperature, maximum exposure temperature, exhaust gas velocity, continuous or intermittent service and required service life.

Advantages

• Controlled acoustic insulation density
• Custom dimensions for silencer cavities
• Easier installation and replacement
• Reduced loose-fiber migration
• Improved insulation retention
• Suitable for high-temperature environments
• Multiple reinforcement options
• OEM and replacement production
• Custom material combinations
• Suitable for small and large production quantities

Replacement Acoustic Pillows
Replacement pillows can be manufactured from existing drawings, customer dimensions, photographs, original samples or baffle cavity measurements. For replacement projects, the existing pillow length, width, thickness, core density and outer construction should be identified whenever possible.

OEM Manufacturing
Custom acoustic insulation pillows can be manufactured for industrial exhaust silencer manufacturers, power generation equipment suppliers, engineering companies and maintenance contractors. Production can be based on customer drawings or project specifications, including prototype development, small batch and volume production.

Information typically required for quotations

• Pillow length
• Pillow width
• Pillow thickness
• Required quantity
• Operating temperature
• Maximum temperature
• Acoustic core requirement
• Required insulation density
• Outer fabric requirement
• Stainless steel mesh requirement
• Exhaust gas velocity if available
• Silencer or baffle drawing
• Photos of the existing component
• Original sample if available

Technical specifications

• Product type: Prefabricated acoustic infill pillow for high-temperature exhaust silencers
• MOQ (order): 1
• Customizable dimensions: length, width, thickness and shape
• Core density: adjustable per application
• Core materials: fiberglass, high-temperature glass fiber, silica fiber, ceramic fiber, other heat-resistant fibers
• Outer covers: fiberglass cloth, silica fabric, high-temperature textile layers
• Reinforcement options: stainless steel wire mesh, additional erosion-resistant layers
• Sewing: high-temperature sewing thread and reinforced stitching systems available
• Applications: gas turbines, industrial exhausts, splitter and stack silencers, acoustic baffles and panels
• Design considerations: operating temperature, gas velocity, vibration, acoustic performance and mechanical exposure