Air Duct Flexible Connector Fire-resistant High-temperature Vibration Isolation

The silicone/fiberglass fire-resistant flexible duct connectors are also known as fire soft joints, these are fabric flexible transition pieces installed between ventilation fans, air conditioning units, air ducts, and air handling coils. Raw material options include fiberglass coated silicone, regular fiberglass, PVC and silicone.

Problems the product resolves

1. Vibration transmission elimination: Fan and blower mechanical vibration transfers rigidly into metal ductwork, triggering pipeline resonance, loud operational noise, and loosened duct fasteners. The flexible fabric body absorbs mechanical shock and vibration.
2. Thermal displacement compensation: Ducts expand/contract with hot/cold airflow temperature swings; rigid metal connections crack or deform under thermal stress, while flexible joints offset dimensional changes.
3. Fire & high-temperature isolation: Silicone/fiberglass materials withstand high working temperatures and block flame spread inside ventilation pipelines, meeting HVAC fire safety codes for mechanical ventilation and smoke exhaust systems.
4. Installation tolerance correction: On-site duct layout measurement errors and assembly misalignment create hard-matching rigid duct interfaces; flexible soft joints accommodate minor positional deviations for easier field installation.
5. Air leakage prevention: Reinforced glued upgraded structure seals the duct connection gap effectively to reduce conditioned air loss and improve overall ventilation efficiency.

Product Information:

Product Features

These flexible fire duct soft joints integrate fire resistance, vibration damping, structural diversity and reinforced sealing as core advantages

1. Fire & high temperature resistance: Silicone/fiberglass fabric construction blocks flame propagation and sustains stable performance under high-temperature exhaust and hot air pipeline working conditions.
2. Excellent vibration & noise reduction: Flexible textile structure decouples fan vibration from metal ducting to lower system running noise and prevent structural fatigue damage on duct frameworks.
3. Multiple customized structures & sizes: Supports angle iron, co-board, coil three mainstream structures with multiple standard size combinations to match most commercial HVAC duct layouts.
4. Multiple material grade choices: Standard PVC for low-temp regular ventilation, fiberglass for general high-temperature scenarios, silicone fiberglass + 304 stainless steel for harsh high-temperature fire exhaust environments.
5. Durable long service life: Verified by repeated bulk purchases from industrial clients with stable product consistency and wear resistance under continuous equipment operation.
6. Quick shipment & complete after-sales support: Factory direct supply with 48-hour dispatch timeline plus 7-day free return for engineering procurement orders.

Application Scenarios

Mechanical contractors, HVAC engineering firms, factory facility managers, commercial property maintenance teams, fire protection system installers are the primary buyers of this flexible fire soft connector.

1. Commercial central air conditioning systems (Office buildings, shopping malls): Install soft connectors between air handling units (AHUs) and main ventilation ducts to dampen fan vibration, reduce indoor HVAC operation noise for occupied public spaces.
2. Industrial factory ventilation & high-temperature exhaust pipelines: Manufacturing workshops with hot flue gas, oven exhaust, and production waste gas piping use silicone fireproof soft joints to resist high heat and stop fire spreading along exhaust ducts.
3. Fire smoke exhaust systems for high-rise buildings: Mandatory fire-rated flexible connections on smoke exhaust fans and smoke ducts to comply with national fire safety building codes while absorbing fan vibration during emergency smoke exhausting.
4. HVAC coil unit piping connections for data centers & clean rooms: Precision equipment spaces require stable, low-vibration air supply; soft joints protect rigid coil piping from fan vibration damage and guarantee airtight clean airflow delivery.
5. Basement parking lot mechanical ventilation systems: Ventilation blowers installed in underground parking lots create strong vibration; these flexible connectors prevent vibration transfer to building concrete structures and eliminate rattling duct noise.

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