FlexElement Special Purpose Couplings
High-Performance Coupling Products
Starting in 1980, FlexElement design engineering personnel created a range of standardized high-performance couplings in compliance with A.P.I. 671 Specification. The resulting products have been manufactured by FlexElement since 1991, incorporating design improvements and new applications along the way. These couplings have been successfully used on critical turbomachinery applications worldwide.
In the marine style configurations, the flexible elements are incorporated as part of the transmission unit to simplify installation and removal.
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- Basic marine style coupling.
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- Marine style coupling with unshrouded elements and standard flanges.
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- Marine style coupling with shrouded elements and co-planer interlocking flanges.
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Contact UsIn the reduced moment configurations, the flexible elements are moved over the shaft end, as close to the shaft bearings as possible, to reduce overhung mass.
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- A reduced moment coupling with shrouded elements and co-planer interlocking drive flanges.
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- A reduced moment coupling with standard drive flanges.
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Contact UsThe 50/50 configurations couple marine style and reduced moment designs and can incorporate any combination of shaft end geometries to fit your coupling needs.
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Contact UsA close-coupled design is made specifically for close proximity machines with minimal distance between shaft ends.
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Contact UsDriveshafts specifically designed for longer span applications requiring lighter weight components. Made of composite tubing, these couplings weigh a fraction of a steel coupling and are a suitable replacement for your application.
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Contact UsFrom hydraulic tooling like pushers and pump kits to ring and plug gauges, FlexElement can provide you with the items necessary to ensure successful installation and removal.
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Contact UsRepair kits include all the parts necessary to restore your coupling to like-new condition, including required disc packs, bushings, drive hardware, stripper hardware, and gagging hardware. Better yet, send the coupling to us, and we will refurbish it for you!
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Transmitting torque and managing misalignment
FlexElement high-performance disc couplings are designed for minimal maintenance and infinite life. Simply put, our couplings are intended to transmit stored energy shaft to shaft from a driver to a driven machine and to absorb stresses caused by residual misalignment between machines by the bending and flexing of metal discs, stresses that would otherwise be imposed on thrust and journal bearings at both ends.
Optimized for each application
Designed using our proprietary Proselekt® software which incorporates finite element analysis, our couplings are optimized for a wide variety of high-speed and high-torque applications.
Each coupling is engineered to accommodate your specific shaft-end geometries and distance between shaft ends.
Technical specifications are translated into solutions using 3D CAD software for visual reference and production drawings.
Reviewed and approved by the client prior to production
FlexElement provides clear and frequent communication with the customer throughout all phases of design and manufacturing to ensure that all questions are answered, commitments are honored, and deadlines are met.
Rigorously inspected, validated, and documented
FlexElement A.P.I. 671-compliant couplings are produced to meet and exceed the standard for features, materials of construction, manufacturing and balance tolerances.
- Our flexible metal disc packs are precision machined of p.t.f.e.-coated high-strength 301 stainless steel to prevent fretting corrosion. Alternate materials, such as Inconel, are also available.
Rigorously inspected, validated, and documented
FlexElement A.P.I. 671-compliant couplings are produced to meet and exceed the standard for features, materials of construction, manufacturing and balance tolerances.
- Our six-bolt, eight-bolt, and ten-bolt configurations of scalloped profile discs are assembled to a precise thickness with machined bushings and washers, and designed to increase flexibility and distribute stress uniformly while reducing weight and inertia.
Rigorously inspected, validated, and documented
FlexElement A.P.I. 671-compliant couplings are produced to meet and exceed the standard for features, materials of construction, manufacturing and balance tolerances.
- All major components, shaft hubs, guard rings, and spacers are fabricated from 4140 alloy steel and dimensionally verified and inspected at multiple stages of the production process. All components are tested for material integrity using industry recognized non-destructive testing methods.
Rigorously inspected, validated, and documented
FlexElement A.P.I. 671-compliant couplings are produced to meet and exceed the standard for features, materials of construction, manufacturing and balance tolerances.
- To ensure proper dynamic balance, each component, subassembly, and final assembly is dynamically balanced to API 671 specifications or other as approved by the customer.
Our products are delivered on time with easy-to-follow installation instructions and ongoing product support.
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Find additional information and answers to our most common coupling questions here.