High Temperature Acoustic Pillow for Exhaust Silencers

High temperature acoustic pillows are prefabricated acoustic infill components installed inside industrial exhaust silencers and acoustic baffles. Their main function is to absorb sound energy while keeping fibrous insulation securely contained under high-temperature and high-velocity exhaust conditions.

Compared with loose-fill or individually installed insulation layers, a sewn acoustic pillow provides a controlled shape, consistent density and easier installation. It also helps reduce insulation displacement, fiber migration and local material loss caused by exhaust gas movement and vibration.

The product is suitable for new silencer manufacturing as well as replacement of damaged or degraded acoustic infill in existing equipment.

Typical Applications

High temperature acoustic pillows can be used in:

• 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

The acoustic pillow can be engineered according to the operating environment and silencer design.

Available customization may include:

• 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

The final construction should be selected according to temperature, gas velocity, vibration, acoustic requirements and mechanical exposure.

Acoustic Core Materials

Different fibrous insulation materials can be used according to the required temperature range and acoustic performance.

Possible core materials include:

• Fiberglass insulation

• High-temperature glass fiber

• Silica fiber materials

• Ceramic fiber materials

• Other heat-resistant acoustic insulation fibers

Core density and thickness can be adjusted according to the available baffle space and required sound absorption performance.

Protective Outer Layers

The outer envelope protects the acoustic core and helps maintain the shape of the pillow during installation and service.

Depending on the application, the construction can include:

• Fiberglass cloth

• Silica fabric

• High-temperature textile layers

• Stainless steel wire mesh

• Additional erosion-resistant reinforcement

For applications involving high exhaust gas velocity, stainless steel mesh or additional protective layers can be incorporated to improve mechanical stability and fiber retention.

Custom Size and Shape

Each exhaust silencer may use a different baffle design, so acoustic 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

• Edge and corner geometry

Rectangular, narrow strip and other custom shapes can be produced according to the silencer structure.

Temperature Considerations

The allowable operating temperature depends on the selected core material, outer fabric, reinforcement layer and sewing system.

Instead of using one temperature rating for every construction, the acoustic pillow should be designed according to the actual exhaust temperature and service conditions.

For high-temperature applications, please provide:

• Normal operating temperature

• Maximum exposure temperature

• Exhaust gas velocity

• Continuous or intermittent service

• Required service life

This information helps determine the appropriate material combination.

Advantages

High temperature acoustic pillows offer several practical advantages for industrial exhaust silencer applications:

• 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

Existing gas turbine or industrial exhaust silencers may require replacement acoustic infill after extended service because of fiber erosion, contamination, vibration, thermal cycling or mechanical damage.

Replacement pillows can be manufactured from:

• Existing drawings

• Customer dimensions

• Photographs

• Original samples

• Baffle cavity measurements

For replacement projects, the existing pillow length, width, thickness, core density and outer construction should be identified whenever possible.

OEM Manufacturing

We manufacture custom acoustic insulation pillows for industrial exhaust silencer manufacturers, power generation equipment suppliers, engineering companies and maintenance contractors.

Production can be based on customer drawings or project specifications.

Available OEM services include:

• Custom dimensions

• Custom materials

• Different insulation densities

• Reinforced constructions

• Prototype development

• Small batch production

• Volume production

• Replacement parts manufacturing

Information Required for RFQ

To prepare an accurate quotation, please provide as much of the following information as possible:

• 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

If the exact construction is not known, dimensions, operating conditions and application information can be used as the starting point for material selection and product development.

Custom High Temperature Acoustic Pillow Manufacturer

High Temperature Acoustic Pillows can be manufactured to match different gas turbine exhaust silencers, industrial silencer baffles and high-temperature acoustic systems.

Send us your drawing, dimensions, operating temperature, quantity or existing sample for evaluation. We can manufacture the acoustic pillow according to your project requirements and provide suitable material and construction options for OEM or replacement applications.