This accessory is available in rectangular, circular and square to round transition configurations. Multiple material options satisfy diverse operating environment requirements: canvas for general indoor ventilation; rubber for high pressure and corrosive conditions; high temperature fabric (short term peak temperature up to 1300 °C); silicon titanium fire resistant material gradually replacing conventional materials to satisfy fire safety standards.         

Connection types include flange connection, welding connection and clamp connection. Pressure ratings cover low pressure (100 kPa) to high pressure (25 MPa). Selected models can compensate for ±30 mm axial displacement and 5° angular deflection.  

Selection shall comprehensively evaluate operating environment, working temperature, process medium, working pressure, air velocity & flow rate, dust loading and positional offset of fan connections.