Non-metallic fabric compensator
The non-metallic fabric compensator,also called fabric expansion joint,is a flexible connection component designed to absorb thermal displacement,isolate vibration,and seal gas media in industrial ducting systems.Constructed from multi-laye...
The non-metallic fabric compensator,also called fabric expansion joint,is a flexible connection component designed to absorb thermal displacement,isolate vibration,and seal gas media in industrial ducting systems.Constructed from multi-layer high-performance fabric composites and metal frames,it serves as a cost-effective alternative to metal expansion joints,especially for high-temperature,corrosive,or vibration-prone environments.Widely used in power plants,petrochemical,metallurgy,cement,and environmental protection industries,it is ideal for hot air ducts,flue gas pipelines,and fan connections.
Structure&Working Principle
It consists of five core parts:non-metallic fabric skin,thermal insulation filler,diversion tube,pressure plate,and metal structural components.The fabric skin,typically made of silicone-coated fiberglass,PTFE laminate,or fluororubber composites,provides flexibility and sealing.The insulation filler(e.g.,ceramic fiber wool)offers thermal resistance,while the metal frame ensures structural stability.
Operating purely through material flexibility,it absorbs axial,lateral,and angular displacements caused by thermal expansion/contraction or mechanical vibration.Unlike metal compensators that generate strong reactive thrust,the fabric design transmits minimal force,simplifying support structure requirements.
Key Features
Multi-directional Compensation:Simultaneously absorbs axial,lateral,and angular movements,outperforming single-direction metal joints.
Zero Reverse Thrust:Flexible fabric eliminates reaction forces,reducing support costs and foundation stress.
High Temperature&Corrosion Resistance:Withstands temperatures from-40°C to 1,200°C;PTFE/silicone coatings resist acids,alkalis,and flue gas corrosion.
Noise&Vibration Isolation:Fabric and insulation layers absorb vibration and reduce system noise by 20–40 dB.
Lightweight&Easy Maintenance:50–80%lighter than metal joints;fabric skin can be replaced on-site without removing the entire unit.
Stress-Free Installation:Compensates for pipeline misalignment and installation errors,avoiding assembly stress.
Common Types&Applications
Shape:Circular,rectangular,or irregular to match duct cross-sections.
Connection:Flange type,nozzle type,or hoop type for easy integration.
Media:Hot air,flue gas,dust-laden gas,and corrosive vapors(not suitable for liquid media).
