Flexible Connection Products

• Displacement Compensation

HUAMI flexible connectors absorb axial, lateral and angular movement between fan units and ducting. Manufacturing tolerance, thermal expansion and long-term structural settlement are accommodated without stress concentration at the interface.

• Vibration Isolation

HUAMI decouples HVAC fans and compressors from the vehicle body, interrupting the transmission path of unit-generated vibration and track excitation into the car structure.

• Noise Reduction

HUAMI attenuates structure-borne fan noise before it reaches the saloon, supporting interior noise targets without added acoustic treatment or duct redesign.

• Airtight Sealing

HUAMI maintains a pressure-rated seal across the full displacement range. Eliminating leakage at duct joints preserves airflow to every diffuser and protects HVAC efficiency over the service interval.

• Fire Safety

HUAMI materials are qualified to EN 45545-2 for fire, smoke and toxicity performance, meeting the mandatory requirement for interior components in European rolling stock.

• Durability & Custom Design

HUAMI withstands tunnel humidity cycling, ozone, UV and vehicle cleaning agents, remaining maintenance-free between overhaul intervals. Every connector is tooled to your duct geometry, displacement range, pressure and temperature envelope.