Apprentice answer

Why would a flexible fan connector balloon out and rip loose

3rd YearVAVs, Fan Coils & Equipment ConnectionsCheck first

A flex connector that balloons like a drum is not handling the pressure, velocity, weather, or clamping detail. Replace with the approved heavy-duty connector material and proper mechanical clamp/ring detail.

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Plain-English answer

Flexible connectors isolate vibration, but the material and connection method still have to match the fan pressure, discharge velocity, location, and weather exposure.

If it balloons or tears loose on startup, stop the fan and inspect the fabric, collar, clamps, grip pins, and pressure direction. The recovery is usually stronger rated fabric, proper slack, reinforced edges, and a real clamping/ring detail per the equipment/project spec.

Ask Foreman

The fan flex connector at [unit/location] ballooned/tore on startup. I checked fabric, clamps, and slack. Do you want it rebuilt with the approved heavy-duty connector and ring/clamp detail?

Verify before acting

Use this as training guidance. Foreman direction, approved drawings, project specs, manufacturer instructions, employer safety policy, and AHJ/code requirements always control the final answer.

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