Basic Info.

Model NO.	silicone fiberglass bellows
Effect	Fixture&Sealing
Cross-Section Shape	Base on Request
Factory	Ningguo Bst Thermal Products Co.,Ltd
Certificates	ISO9001:2015 IATF16949
MOQ	1000 USD
Standard Color	Gray, Red, Black, Silver
Transport Package	Carton Box
Specification	base on request
Trademark	BSTFLEX
Origin	China
HS Code	701959
Production Capacity	5000

Packaging & Delivery

Package Size30.00cm * 30.00cm * 30.00cm Package Gross Weight1.000kg Lead Time 3 days (1 - 100 Pieces)
To be negotiated ( > 100 Pieces)

Product Description

High Temperature Fabric Bellows with Zipper - Stitched EPDM / Silicone / Fiberglass Composite

Product Description

The high temperature fabric bellows with zipper is designed for thermal protection, expansion compensation, and flexible sealing in industrial systems exposed to heat, vibration, and movement.

Manufactured by BSTFLEX, this bellows is stitched and sewn construction, incorporating a zipper opening for easy installation and removal.
It is fabricated from multi-layer high-performance textile materials, including ceramic fiber, fiberglass cloth, aluminum foil, silicone rubber coated fiberglass, EPDM, neoprene, graphite, and aramid fabrics, selected according to operating conditions.

The textile bellows structure allows absorption of axial, lateral, and angular movement while maintaining effective thermal insulation and sealing.

Material Structure & Construction

Outer Protective Layer

• Silicone rubber or aluminum coated fiberglass fabric

• Heat resistant and fire retardant

• Optional EPDM or neoprene for environmental resistance

Insulation & Reinforcement Layers

• Fiberglass, ceramic fiber, or silica fabric

• Graphite or aramid reinforcement for high-strength applications

• Excellent thermal stability and flame resistance

Stitched & Sewn Bellows Design

• Industrial sewing with high-temperature thread

• Flexible bellows geometry for movement absorption

• Durable textile construction

Zipper Closure System

• High-temperature resistant zipper

• Allows quick installation and removal

• Ideal for retrofitting and maintenance access

This composite design ensures durability, flexibility, and reliable performance in harsh environments.

Main Functions

• Compensates thermal expansion and contraction

• Absorbs vibration and mechanical movement

• Provides thermal insulation and fire protection

• Seals ducts, equipment, and machinery openings

• Allows easy access through zipper design

The bellows is designed for air and gas systems, not for liquid pressure piping.

Technical Specifications

Typical Applications

• Industrial ducting and ventilation systems

• Expansion joints for exhaust and hot air ducts

• Equipment requiring removable thermal covers

• Power plants, cement, steel, and process industries

• Machinery with vibration and thermal movement

These fabric bellows are widely used where flexibility, heat resistance, and service accessibility are required.

Advantages Compared with Metal Bellows

Customization & Supply Capability

BSTFLEX offers full OEM and custom fabrication services, including:

• Material selection based on temperature and environment

• Zipper type and placement customization

• Multi-layer fabric construction

• Custom dimensions and shapes

• Export-grade industrial packaging

Each bellows is manufactured according to drawings or operating requirements.

Important Notice

Material combinations and bellows design should be selected based on operating temperature, movement range, and environmental exposure to ensure optimal performance.

The stitched high temperature fabric bellows with zipper manufactured by BSTFLEX provides reliable thermal insulation, expansion compensation, and flexible sealing for industrial ducting and equipment.

With multi-material composite construction, removable zipper design, and custom fabrication capability, it is an effective solution for high-temperature and dynamic industrial applications.

Item	Description
Product Type	Fabric Bellows / Textile Expansion Joint
Manufacturer	BSTFLEX
Construction	Stitched / Sewn with Zipper
Materials	Fiberglass / Ceramic / Aramid / Graphite
Coating Options	Silicone / Aluminum / EPDM / Neoprene
Function	Expansion Compensation & Heat Protection
Temperature Resistance	High-Temperature Industrial Use
Movement Capability	Axial / Lateral / Angular
Custom Fabrication	Available
OEM Service	Supported

Aspect	Fabric Bellows	Metal Bellows
Flexibility	Excellent	Limited
Weight	Lightweight	Heavy
Thermal Insulation	Built-In	Requires Additional Insulation
Installation	Easy (Zipper)	Complex
Noise & Vibration	Reduced	Higher