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Circular EPDM
Flexible Connections

Circular EPDM flexible connections - Model 521 and 522
Industrial Grade, All Welded Construction

Applications
  • Fan inlets and outlets
  • Pressure blower inlets and outlets
  • Compressor inlets and outlets
  • Scrubber inlets and outlets
  • Stack inlets
  • Ventilation and process ductwork
Model 521 circular EPDM flexible connections
  • Tough, 1/8" thick, layered EPDM flex membrane with internal nylon scrim for superior tear strength
  • Resistance to ozone and UV exposure, and cold cracking makes it ideal for outdoor use
  • Good for airstream flows to 6,000 fpm and pressures from -30" wg to +120" wg
  • All welded, matched and drilled flanges
  • Backing bars fastened in place with zinc plated hardware
Model 522 circular EPDM flexible connections
  • Identical construction to Model 521 flexible connections, with an aerodynamically designed, protective metal flow liner
  • Good for airstream flows over 6,000 fpm and pressures from -120" wg to +120" wg (with a flow liner)
  • Double deflectors are also available for extra flow protection and noise reduction
Circular EPDM flexible connections
Circular EPDM flexible connections features image

For other customized silencer designs, please contact us and we will be happy to assist you.

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Product details

Operating temperatures

Up to 225° F

Flows

Up to 6,000 fpm (Model 521)

Over 6,000 fpm (Model 522)

Pressures

-30" wg to +120" wg (Model 521)

-120" wg to +120" wg (Model 522)

Sizes

From 12" ID to 120" ID (standard)

Larger sizes available

Flange-to-flange length

8" for flanges less than 4"

10" for flanges 4" and larger

Lateral and axial movement

+/- 0.5"

Unit weight

Up to 600 lbs (standard sizes)

Materials

Carbon steel flanges, backing bars and flow liner (if supplied), zinc plated backing bar hardware and EPDM flex membrane


Stainless steel flanges, backing bars, flow liners and hardware available


Galvanized construction also available

Paint finishes:

Alkyd, enamel, high heat, inorganic zinc, epoxy and polyurethane