Rubber flue duct expansion joints Connectors: An economical
integrally flanged design,rubber flue duct expansion joints is used
for applications where there are large movements. The duct
connector is manufactured in a W-Design configuration with a
minimum of one (1) to two (2) plies of reinforced fabric vulcanized
into a homogeneous product that is 3/16", 1/4" or 3/8" thick. The
flanges shall be an integral part of the expansion joint.
Rubber flue duct expansion joints manufactured with a premolded
arch. The arch continues through the corner and shall be fully
developed when in the neutral position. Listed below are
considerations regarding the design of the Style rubber flue duct
Non-metallic duct connectors:ssystem Design Considerations: In
designing the rubber flue duct expansion joints, non-metallic duct
connector, several considerations must be taken into account to
ensure long lasting service.
System Media: The designer and/or requesting party should define
the system media to determine the correct elastomer for each
application. Evaluation of the gas/air composition should be made
during design of the non-metallic fan/duct connector. Abrasion
characteristics and external environment conditions should also be
taken into account when specifying the fabric element.
System Temperature: The system operating temperature is of primary
importance to the design of a non-metallic fan/duct connector,
although the system design is generally specified. It is important
to distinguish between operating and design as “design” can include
a significant safety factor which may result in an upgraded
material or design selection.
System Pressure: Normal operating pressures and maximum pressures
(positive and negative) under upset conditions should be specified.
Combinations of pressures and temperatures should be specifically
Movements: Movements consist of thermal growth resulting from both
operating and upset conditions. Individual movements resulting from
both conditions should be specified. Maximum installation
misalignment should also be taken into account to determine if the
non-metallic fan/duct connector design is capable of reacting to a
combination of the total maximum movements.
BB Chlorobutyl 300°
EE EPDM 3/16" 1 300° ±2
HH Hypalon® 225°
NH Neoprene/Hypalon® 1/4" 2 225° ±3
NN Neoprene 212°
NP Neoprene/Buna-N 3/8" 2 212° ±5
VV Viton® 400°