One of the core functions of PVC flexible fabric connectors in duct systems is displacement compensation. During actual operation, duct systems may experience varying degrees of displacement due to multiple factors. If rigid connections are used, it can easily lead to joint cracking or system leakage.

Temperature fluctuations cause axial expansion and contraction of pipelines. The flexible connector absorbs length changes caused by temperature variations through the elastic deformation of its fabric, ensuring that joints are not subjected to additional stress.

Fans, air handling units, and other equipment generate vibration and displacement during start-up and shut-down. The flexible structure of the connector effectively isolates equipment vibration, absorbs displacement energy, and prevents fatigue failure at connection points.

Axis deviations or flange centering errors are common on construction sites. The flexible connector can compensate for such errors within a certain range, reducing installation difficulty and avoiding stress concentration caused by forced alignment.

Uneven building settlement creates stress on pipelines passing through building structures. The flexible connector adapts to such slow displacement through its own deformation, preventing pipeline cracking or joint separation.

Based on the displacement compensation function described above, PVC flexible fabric connectors are widely used in multiple fields.

1. Building Ventilation and Air Conditioning (HVAC)
   • Flexible connections at air handling unit inlets and outlets
   • Flexible connections at fan coil unit outlets
   • Vibration damping joints in fresh air systems
2. Industrial Ventilation and Dust Removal
   • Fan interfaces in factory exhaust systems
   • Inlets and outlets of dust removal equipment
   • Welding fume extraction systems
3. Fire Protection Smoke Exhaust Systems
   • Fixed fabric connections for smoke barriers
   • Connections between smoke exhaust fans and ductwork
   • Flexible joints in positive pressure ventilation systems
4. Other Special Applications
   • Subway tunnel ventilation systems
   • Marine and offshore engineering ventilation
   • Cleanroom ventilation (requiring dust-proof and antibacterial coatings)