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L SERIES
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METAL MEMBRANE COUPLING L SERIES Technical Specification A – Stainless steel flexible membranes B – Overload and anti-fly protection collars A C – Anti-corrosion treatment D – Membrane unit assembly for ease of fitting E – Fitted bolts for balance integrity C F – Scalloped hubs to maximize bore Product Description John Crane’s Metastream L Series range of membrane couplings has been specifically designed to provide a cost-effective solution for demanding industrial applications. The couplings are selected by their torque capacity, with the scalloped hub providing the right size for the shaft. • Easy to install • Operates in either direction • A hubs supplied either finish machined or solid • Coated carbon steel hardware for corrosion protection • Choice of hub configuration to suit the shaft diameter • ATEX compliant Design Features • it and forget – Designed for infinite life and, with correct F machinery alignment, will often outlast the machines it connects • verload protection — Fitted with overload collars to protect O the membranes in the event of severe torsional overload • ow imposed loads — Designed to optimize torque capability L while minimizing reaction forces due to misalignment, maximizing the life of the machines connected • Zero maintenance — Requires no lubrication or routine maintenance • o backlash — Torsionally stiff design ensures there is N zero backlash, making coupling ideal

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METAL MEMBRANE COUPLING L SERIES Technical Specification L Series Typical Arrangement D L Series Imperial Dimensional Data (Inches) Coupling Size Notes: 1 Maximum bores shown are based on standard ANSI/AGMA square key dimensions for sizes 0007 through 3000 and rectangular key dimensions for sizes 4200 through 9025. 2 Dimensions should not be used for construction. Certified dimensions furnished upon request. 3 X These distance between shaft end (DBSE) sizes are more readily available. Other lengths to suit specific shaft separations are available.

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METAL MEMBRANE COUPLING L SERIES Technical Specification L Series Typical Arrangement D Notes: 1 Maximum bores shown are based on standard DIN/BS rectangular keys. 2 Dimensions should not be used for construction. Certified dimensions furnished upon request. 3 X These distance between shaft end (DBSE) sizes are more readily available. Other lengths to suit specific shaft separations are available.

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METAL MEMBRANE COUPLING L SERIES Technical Specification Selection Procedure (Metric) 1. Select appropriate service factor (SF) 2. Calculate the coupling rating R from: R = kW x 1000 x SF (kW/1,000 rpm) N Where: kW = rated power for driven equipment (kW) N = speed (rpm) 3. Select a coupling with the same or higher rating. 4. Check distance between shaft ends (DBSE). 5. Check the hub bore capacity is suitable. If not, select a larger size coupling. 6. Check peak torque capability is suitable for application. 7. Check speed capability is suitable. 8. Specify DBSE as appropriate. Selection...

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METAL MEMBRANE COUPLING L SERIES Technical Specification Coupling Alignment Correct installation and alignment of shafts are essential for reliable machinery performance. The angular and axial restoring forces in the table below are given at maximum deflections. The chart can be used to determine forces across the full deflection range. The nonlinear characteristics of axial stiffness can dampen a system to prevent high-amplitude axial vibration. Restoring Max. (2) Moment (3) Axial Equivalent Max. at Max. Max. ± mm Coupling Equivalent Thrust Angular Angle Parallel kN Degrees Nm mm Size...

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METAL MEMBRANE COUPLING L SERIES Technical Specification

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METAL MEMBRANE COUPLING L SERIES Technical Specification

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METAL MEMBRANE COUPLING L SERIES Technical Specification North America United States of America Europe United Kingdom Latin America Brazil Middle East & Africa United Arab Emirates Asia Pacific Singapore If the products featured will be used in a potentially dangerous and/or hazardous process, your John Crane representative should be consulted prior to their selection and use. In the interest of continuous development, John Crane Companies reserve the right to alter designs and specifications without prior notice. It is dangerous to smoke while handling products made from PTFE. Old and new...

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