PRODUCT GROUP

Expansion Joints

Fabric, steel, and rock-wool-insulated compensator solutions for ducts, fans, filters, stacks, and hot gas lines. Hantech Filter evaluates material properties, target capacity, line geometry, drive, wear, sealing, and maintenance access together within the same conveying system.

Fabric expansion joints and flexible duct connections

Steel expansion joints and hot-gas expansion connections

Rock wool–filled, insulated, and multi-layer expansion joint designs

Vibration, thermal expansion, and duct displacement checks

Manufactured to flange size, temperature, pressure, and gas/dust characteristics

Request a quote for this product All products

Global technical approach

Compensator selection is made by evaluating temperature, expansion, vibration, and sealing together

A compensator is more than just a flexible connection. Thermal expansion, vibration, axial/lateral displacement, gas/dust characteristics, and insulation needs are all assessed together across fan, filter, duct, stack, and hot gas lines.

Hantech Filter Expansion Joints technical product selection

Expansion joints decision criteria

Product selection is made by evaluating site data, process risk, maintenance access, and operating cost together.

Information to be clarified before quotation

Duct/flange size and connection type
Continuous and peak operating temperature
Need for axial, lateral, and angular movement
Gas/dust type, abrasiveness, spark, and moisture information
Layout photos of the air handling equipment, filter, stack, or process equipment

Expansion movement

The amount of axial, lateral, and angular movement determines the compensator type and layer construction.

Temperature & insulation

Continuous/peak temperature directly affects the choice of rock wool insulation and inner layer.

Tightness

Gas, dust, spark, and condensation behavior determine the fabric/steel material and flange details.

Vibration cut

Reduces the transmission of equipment vibration through the line at air handling equipment, duct, and filter connections.

Product / application comparison

Type / solution	App	Advantage	Caution point
Fabric expansion joint	Air handling equipment suction/discharge, filter-duct connection, low-to-medium pressure lines	Flexible, lightweight, absorbs vibration and small displacements well	Temperature, sparks, wear, and UV/chemical exposure are checked
Steel expansion joint	Stacks, hot gas, and lines requiring high temperature or mechanical strength	High pressure and temperature resistance, safe metallic housing	Corrosion, fatigue, and correct anchoring/guiding are required
Stone-wool insulated expansion joint	Hot gas, kiln/dryer outlet, power generation, and cement processes	Reduces heat loss and outer surface temperature while protecting the inner layers	Layer order, insulation thickness, and outer cladding are selected according to site conditions
Multi-layer custom expansion joint	Abrasive dust, chemical gas, high temperature, and special displacement	Process compatibility through layers such as PTFE/silicone/fiberglass/aramid	Material selection requires actual temperature and gas analysis

Technical check matrix

This list is not a “success percentage”; it shows the design variables we always verify during quotation and site survey. Product selection is not finalized until every item has been correctly measured.

Temperature and peak valueCritical control

Axial/lateral movementCritical check

Gas-dust and chemical effectCritical check

Flange and installation toleranceCritical check

Insulation and outer surface safetyCritical control

Risks we check on site

Incorrect capacity or high pressure loss
Wear, corrosion, leakage, and service access
Short service life due to incorrect material/media selection
Mismatch between air equipment, ducting, filter, and discharge equipment
Planned downtime and commissioning verification

Product images

Correctly categorized site and equipment images for expansion joints

These images were named directly from the source product folder according to technical product group, optimized as WebP, and placed here without affecting page performance.

Hantech Filter Flexible loading expansion joint — **Flexible loading spout**Flexible loading spout; used for dust-free discharge under silos and hoppers.

Hantech Filter Bin activator / flexible expansion joint — **Bin activator / flexible connector**Bin activator / flexible connector, regulating material flow beneath the hopper.

Hantech Filter Rectangular fabric expansion joint — **Rectangular fabric expansion joint**Rectangular fabric expansion joint; absorbs fan/duct vibration and expansion.

Hantech Filter Bin activator — **Bin activator**Bin activator, reducing material bridging beneath the hopper.

Hantech Filter Dual-motor bin activator — **Dual-motor bin activator**Dual-motor bin activator; used for consistent feeding of difficult-flowing materials.

Hantech Filter Steel-flanged fabric expansion joint — **Steel-flanged fabric expansion joint**Steel-flanged fabric expansion joint; accommodates vibration, expansion, and assembly tolerance.

Hantech Filter Vibrating bin activator — **Vibratory bin activator**Vibratory bin activator; reduces bridging and flow problems inside the hopper.

Hantech Filter Telescopic loading spout — **Telescopic loading chute**Telescopic loading chute; provides dust-free loading at silo/filling points.

Hantech Filter Stainless expansion joint — **Stainless expansion joint**Stainless expansion joint; absorbs temperature/vibration and expansion effects.

Hantech Filter Conical hopper bin activator — **Conical hopper bin activator**Conical hopper bin activator; regulates material flow.

Hantech Filter Dual-vibrator bin activator — **Dual-vibrator bin activator**Dual-vibrator bin activator; reduces bridging in difficult-flowing dust.

11 optimized images have been linked to this product group; images are served in WebP format for fast loading.

Technical selection

What we evaluate together during the quotation process

Material name and bulk density, ton/hour capacity, particle size, moisture, temperature, line length, incline/elevation difference, operating duration, and connected equipment are all evaluated together.

Capacity and operating regime

Nominal/peak tons per hour, daily operating time, and feed continuity are calculated together.

Material and line geometry

Bulk density, particle size, moisture, abrasiveness, line length, and elevation difference determine the equipment type.

Drive, safety, and maintenance

Motor-gearbox, sensors, guards, service covers, and planned maintenance access are defined from the outset.

Product groups

Other filtration products

Hantech Filter Filter Bags — Polyester, PP, acrylic, PPS, aramid, P84, PTFE, glass fiber, antistatic and ePTFE membrane filter bag options.

Product

Filter Bags / PTFE Membrane

Filter Bags

Polyester, PP, acrylic, PPS, aramid, P84, PTFE, fiberglass, antistatic, and ePTFE membrane filter bag options.

Explore

Hantech Filter Filter Cages — Filter cage, bag cage, cataphoresis-coated cage, silicone-coated cage, SS304 venturi cage and membrane-compatible cages.

Product

Filter Cages / SS304 Venturi Cage

Filter Cages

Filter cage, bag cage, cataphoresis-coated cage, silicone-coated cage, SS304 venturi cage, and membrane-compatible cages.

Explore

Hantech Filter Air Slide Fabric — Air slide fabric, air slide cloth and cement pneumatic conveying fabrics.

Product

Air Slide Fabric / Cloth

Air Slide Fabric

Air slide fabric, air slide cloth, and cement pneumatic conveying fabrics.

Explore

Product

Liquid Filtration / Filter Bags

Liquid Filtration

Filter bags for liquid processes, cartridge/bag filter housing selection, and chemically compatible filtration solutions.

Explore

Get a technical quote for expansion joints.

Share your material type, target capacity, line length, elevation difference, and operating regime; we'll clarify the conveying equipment and connected line scope.

Technical Quote Form Write on WhatsApp