Atlantic International Coupling

UNAFLEX® "MIGHTY-SPAN" Style 600 Rubber Flue Duct Expansion Joints are designed to handle hot air or gasses in industrial duct work, as well as those generated by power plant and pollution control equipment. They are custom constructed of rubber and fabric to absorb thermal movements and vibration in duct work and to aid in the elimination of noises caused by scrubber equipment and mechanical dust collectors. MIGHTY-SPAN is capable of handling any combination of large movements which might occur in a ducting system due to thermal expansion. MIGHTY-SPAN creates almost no load on damper and fan interfacing flanges, thus providing much needed protection in these critical areas. A wide range of elastomers and fabric substrates are available to provide maximum resistance to corrosion and high temperature capabilities. Let UNAFLEX® assist you in selecting the MIGHTY-SPAN product for your application. Available in a wide choice of materials and Drill Patterns

Unaflex® “Multi-Purpose” PTFE Expansion Joint styles 112, 113 and 115 are solid-moulded of PTFE and specially designed to withstand the higher pressures and temperatures of today’s piping systems. Their design allows a shorter face-to-face dimension, making them ideal for installation where space limitations are a factor. They are lightweight in design and corrosion resistant. Available in sizes 1” to 48” I.D. and for temperatures ranging from -20◦F to +400◦F. Note: For sizes above 12", 2-Ply FEP joints are available

UNAFLEX® can custom design and manufacture various types of expansion joints based on your needs and requirements of the system. Some commonly used non-standard expansion joint types are: Dual Expansion Joints Drilling Information Dual expansion joints are used where axial movement is larger than can be absorbed by a single expansion joint. The dual assembly consists of two single bellows connected by an interconnecting weld end. In some cases, this interconnecting weld end has an integral anchor base. The anchor base is designed to withstand the forces required to move either bellows but not for pressure forces. When no anchor base is used, interconnecting weld end must be anchored with standard pipe anchors. Dual expansion joints can also be used where large amount of movement in any combination (i.e. axial, lateral and angular rotation) is required which cannot be absorbed by a single expansion joint. In this type of application, the interconnecting weld end is not anchored but the remaining system must be properly anchored and guided. back to top of page

Control units may provide additional support to rubber expansion joints by adding rigidity strength when proper anchoring is not available. Control units are also used to restrict the movement allowances of an expansion joint. They should always be used when excessive stress and motion on the joint might cause that joint to fail or be over-stressed to the point of near failure of the joint and its reason for being. Control units are made up of: Gusset Plates: Triangular shaped plates of steel that attach to the bolt circle of the flange and provide for a threaded rod at the apex. Threaded Rod: a fully threaded steel rod installed at the top of the gusset plate to give strength and rigidity to the rubber expansion joint. Nuts: The threaded rod is secured to the gusset with nuts placed along the outer face of the gusset typical installation has two (2) nuts outside of each gusset plate Internal Nuts: One method of restricting the compression of an expansion joint is by applying two (2) nuts to the inside of the gusset plate to limit how far the gusset can travel along the axis. Compression Rod: A tubular section of steel pipe installed around the threaded rod on the inside of the gusset plates to limit the allowable compression movement.

In order to accommodate a wide array of temperatures, the SecureFlex Style 7000 is available in an assortment of elastomer and reinforcement combinations. Temperature allowances may range from 180°F to 400°F. Primary Elastomers Natural Rubber - 180°F Gum Rubber - 180°F Neoprene - 225°F Nitrile - 225°F EPDM - 250°F Hypalon - 250°F Chlorobutyl - 250°F Viton® - 400°F PTFEFEPTFE - 400°F Other Elastomers Available White FDA NSF Peroxide Cured 300°F rating available for EPDM and Chlorobutyl for Air Service at 50 PSI MAX

The SecureFlex Van Stone interlocking flanges are compatible to mate with Lap-Joint Stub ends, Raised Face or Flat Full Face type flanges. For other mating flange surfaces (wafer type check or butterfly valves), a full face hard spacer may be required. Consult UNAFLEX® Engineering. The standard floating flanges are 150# drilled epoxy-coated carbon steel. Galvanized, stainless steel and other alloy type materials are also available. DIN-PN-JIS and other non-standard drill patterns customizable to your needs. Kevlar® wrapped around a solid steel ring in the base of the rubber flange portion eliminates the tire cord from “pulling out” of the flange and provides superior sealing force when compressed against the mating flange during installation. The ring also prevents the distortion of the sealing surface if the installation tolerance is exceeded providing an “extra” margin of safety. Polyester tire cord may be substituted, with customer approval, for sizes 14” and above if design temperature does not exceed 250°F. Our Flexible Tooling process allows us to manufacture the Expansion Joints to Non-Standard face-to-face dimensions. For smaller dimensions than Standard, design movements may be reduced. Double and Triple arch expansion joints are also available for greater movement and reduced spring rates. We can also manufacture Concentric and Eccentric Tapers and Offset styles. Sizes up to 144” can be constructed. Standard control rods that install out-board of the mating flanges are standard. Integral tie rods attached to the floating flanges can also be supplied.

UNAFLEX® "Supreme" Arch-Type Expansion Joints are the WORKHORSE of our line. The arch design is the key that furnishes the flexibility required. Basic styles available in single, multiple or wide-arch constructions include: Style 150 for pressure and vacuum Style 200 for heavy duty pressure and vacuum Style 200XL for very high pressure service Concentric Eccentric (Expansion Joints that handle up to 500°F are available) Basic construction consists of tube, flange, carcass, internal steel reinforcements, cover and steel retaining rings, and hand wrapped finishes. UNAFLEX® Expansion Joints can be made with: Filled arches Multiple arches PTFE lined Sleeve ends Without arch Tapered (eccentric or concentric) Offset With enlarged arches and with special tube compounds for air, gas, oil, petroleum products, acids, slurries and chemicals of many kinds. Fire retardant construction to ASTM F1123 specifications and readily available with complete testing and certification. All "Supreme" Expansion Joint constructions can conform to U.S. Coast Guard requirements per customer request.

ThermaFlex Fabric Expansion Joints are non-metallic flue duct expansion joints that provide stress relief for piping and ducting systems by absorbing thermal growth and shock, isolating mechanical vibration, and allowing for misalignments.ThermaFlex expansion joints are precision engineered specifically for your application. ThermaFlex Flue duct expansion jointsare custom engineered to handle low pressure (±3 psig) applications with temperatures ranging from -100°F to more than 2000°F. Industry Proven materials and precise engineering go into every Thermaflex Fabric Expansion joint. UNAFLEX® is the country's leading Expansion Joint Manufacturer. Since 1972, Unaflex® has been dedicated to state-of-the-art technologies combined with industry proven processes. Unaflex® has become the industry leader in "Combined Technologies" for the Expansion Joint and Flexible Hose industries.

Expansion joints are a crucial component to an industrial piping system, allowing for movement caused by thermal expansion and equipment vibration. This expansion and vibration can be detrimental to the integrity of the machines and nearby equipment. This movement can also increase the risk of failure. Protecting your piping investment with proper installation of expansion joints is a reliable way to prevent failures and unnecessary down time. Style 1000 Features and Benefits Versatile, reliable and economic solutions to your piping needs Delivers twice the movement allowances than standard arch construction Double reinforced construction provides longer joint life expectancy Hand wrapped custom built construction to allow for design variations, while still offering wide arch movement Suited for temperatures in excess of 350°F (176°C) depending upon service, reinforcement, and compound Exceptional directional movement absorption capabilities Available in a full range of elastomers to enable multi-purpose applications Construction provides woven polyester fabric and reinforced wire to create superior performance characteristics Standard and custom dimensions available Supports a piping system pressure range of 85 Psig to 225 Standard and additional drilling available including Navy, ANSI, Metric and JIS Tube and cover materials available in: EPDM, Natural Rubber, Buna-NNitrile, Silicone, Neoprene, Gum Rubber, Hypalon, PTFEFEPTFE, Butyl, SBRGRSBuna-S, Viton®Fluorel and Chlorobutyl Reinforcement Materials and Compatibility: Polyester, Fiberglass, Nomex, Nylon, Rayon and Kevlar® Superflex Joints can be specially constructed for vacuum service and can be reinforced for higher pressure applications (SEE Style 200XL).

UNAFLEX® "MATCHLESS" Metal Bellows are manufactured from solution annealed ASA240 321SS sheet rolled into a tube and seam welded. Multi-ply bellows can be designed and manufactured based on the application and design requirements. UNAFLEX® has a wide variety of MATERIALS available to design and manufacture bellows. UNAFLEX® has the most commonly used metal bellows materials and thicknesses in stock to serve our customers faster. UNAFLEX® "MATCHLESS" bellows conform to the latest EJMA standards.

UNAFLEX® "Supreme" Arch-Type Expansion Joints are the WORKHORSE of our line. The arch design is the key that furnishes the flexibility required. Basic styles available in single, multiple or wide-arch constructions include: Style 150 for pressure and vacuum Style 200 for heavy duty pressure and vacuum Style 200XL for very high pressure service Concentric Eccentric (Expansion Joints that handle up to 500°F are available) Basic construction consists of tube, flange, carcass, internal steel reinforcements, cover and steel retaining rings, and hand wrapped finishes. UNAFLEX® Expansion Joints can be made with: Filled arches Multiple arches PTFE lined Sleeve ends Without arch Tapered (eccentric or concentric) Offset With enlarged arches and with special tube compounds for air, gas, oil, petroleum products, acids, slurries and chemicals of many kinds. Fire retardant construction to ASTM F1123 specifications and readily available with complete testing and certification. All "Supreme" Expansion Joint constructions can conform to U.S. Coast Guard requirements per customer request.

UNAFLEX® "Supreme" Arch-Type Expansion Joints are the WORKHORSE of our line. The arch design is the key that furnishes the flexibility required. Basic styles available in single, multiple or wide-arch constructions include: Style 150 for pressure and vacuum Style 200 for heavy duty pressure and vacuum Style 200XL for very high pressure service Concentric Eccentric (Expansion Joints that handle up to 500°F are available) Basic construction consists of tube, flange, carcass, internal steel reinforcements, cover and steel retaining rings, and hand wrapped finishes. UNAFLEX® Expansion Joints can be made with: Filled arches Multiple arches PTFE lined Sleeve ends Without arch Tapered (eccentric or concentric) Offset With enlarged arches and with special tube compounds for air, gas, oil, petroleum products, acids, slurries and chemicals of many kinds. Fire retardant construction to ASTM F1123 specifications and readily available with complete testing and certification. All "Supreme" Expansion Joint constructions can conform to U.S. Coast Guard requirements per customer request.

In order to accommodate a wide array of temperatures, the SecureFlex Style 7000 is available in an assortment of elastomer and reinforcement combinations. Temperature allowances may range from 180°F to 400°F. Primary Elastomers Natural Rubber - 180°F Gum Rubber - 180°F Neoprene - 225°F Nitrile - 225°F EPDM - 250°F Hypalon - 250°F Chlorobutyl - 250°F Viton® - 400°F PTFEFEPTFE - 400°F Other Elastomers Available White FDA NSF Peroxide Cured 300°F rating available for EPDM and Chlorobutyl for Air Service at 50 PSI MAX