Effox-Flextor-Mader (EFM) is the recognized leader in providing non-metallic Expansion Joints to the utility and industrial markets around the world. With custom engineered designs for each application, EFM has provided reliable flexible solutions for service from -40°F to 2100°F (-40°C to 1149°C). Our EFLEX™ expansion joints reflect the highest engineering standards and professional workmanship in the power generation and heavy industrial market. The EFM team provides customer service and technical support from project inception to completion.
EFM offers designs specifically engineered for every application and have supplied expansion joints in Boilers, Incinerators, Fans, Environmental Control Equipment such as SCRs, FGD and Fabric Filters. Our expansion joints can be found in Fossil Fired Power Plants, Refineries, Petrochemical Plants, Cement Plants, Steel Mills, Pulp & Paper Plants, and Gas Turbine Applications throughout the world.
The design parameters which influence the performance of any expansion joint and which must be defined for proper design analysis include:
Elastomeric expansion joints are used in flue ducts operating at or below 400°F (204°C) and provide vibration and acoustic dampening when connected to large fans.
Material selection is based on maximum duct temperatures and flue gas composition.
Our EFLEX™ Fluoroflex expansion joints can provide a flexible solution for applications operating at or below 600°F (316°C). These materials are designed for wet and/ or corrosive services and provide outstanding resistance to chemicals and heat beyond that of elastomers. Fluoroflex belts are manufactured using a fluoropolymer (PTFE) coated fiberglass cloth with a secondary laminated corrosion barrier of cross-plied PTFE resulting in a superior chemical resistant product with ZERO porosity.
Composite expansion joints consist of layers of material bonded and sewn together along the outer edges starting with our Fluoroflex single layer belt as the outside cover and gas seal member. Each layer of a composite is designed to work in unison for the specific service conditions up to 2100° F (1149° C).
Our EFLEXTM Fluoroflex single layer belt beside with the highest temperature capability for a gas seal layer.
Needled fiberglass insulation thermally bonded to the EFLEXTM Fluoroflex substrate to protect from heat degradation. The bonding prevents separation and potential “Hot Spots”.
Additional vapor barrier can be provided for applications which may cycle through dew point.
Vermiculite coated fiberglass fabric acts as an insulator and increases expansion joint strength and durability. Wire mesh layers may also be added for increased
durability and abrasion resistance.
The presence and thickness of this layer is determined by the system temperature to ensure that the heat transfer from the flue gas is reduced to a point less than the maximum temperature of the vapor barrier and cover.
Close weave material binds the belt together, acts as an insulator and adds strength for handling and service. Note: A metal flow liner may be required to protect against abrasion.
This chart represents only the basic expansion joint designs. Contact EFM for the best solution to fit your needs.