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Diaphragm couplings
Highest torques are safely and reliable transmitted at the highest speed via a contoured single diaphragm. Power ranges of up to 150 MW can be easily accommodated to match our high-speed gear units. The unique contoured diaphragm and its flexibility allow the compensation of axial, radial and angular misalignments.
Our diaphragm couplings are maintenance-free and stand out for their extremely long service life along with maximum availability. Plus, the basic version consists of just a few components, which simplifies assembly and handling significantly for the user.
High Performance Disc +
Diaphragm Couplings
Typical Applications
Gas & Steam Turbines
Compressors
Generators
Pumps
Marine/Offshore Platform
Pipelines
High Performance Diaphragm Couplings
Diaphragm Couplings allow the transmission of torque. They can handle misalignment, based on the thickness distribution (or profile) of the diaphragm. Unlike competing designs, we use a single stainless steel diaphragm. This eliminates the need for extra bolts, rivets, splines and filler rings.
It also greatly simplifies the task of shaping the perfect diaphragm, since we need only one diaphragm per end. We use a modified profile based on extensive FEA. The thickness of the diaphragm varies so stress is distributed evenly when the diaphragm flexes. This happens under the simultaneous effects of torque, speed, axial misalignment and angular misalignment.

High Performance Diaphragm Couplings
Features & Benefits:
All couplings are custom designed to meet the specific requirement of the application and OEM – Engineered drive solutions.
Meets API 671.
Drop in replacement of Lucas®: (Bendix) diaphragm coupling – click above for details.
Marine and Reduced Moment Designs.
Field replaceable, stockable diaphragm – not available from anyone else.
Specially contoured one piece design – easy to install, cost competitive and easy to customize.
Patented one piece design – handles more misalignment and greater range of torsional stiffness.
Torque capacity over 50 million In-Lb. (5650 kN-m).
Shaft diameter over 19 inches (480 mm).
Other features: piloted fits, 15-5 pH stainless steel and other material available, shot peened, inherently low windage.
Options: Electrically insulated, shear section, back up or fail safe gears, various materials, and many more.

EP 1005 Diaphragm couplings
Features & Benefits:
Maintenance-free
High temperature-resistance
Maximum radial rigidity
Low restoring forces and bending moments
Lightweight
Very high torque and speed transmission
Long service life with maximum reliability
Very high balance quality
Few individual components for simple assembly

Disc 1 Diaphragm Couplings
Multiple, separated, convoluted diaphragms allow greatest design flexibility for most demanding applications
API-671 compliant
Best for high axial travel requirements

Disc 2 Diaphragm Couplings
Optimized disc profile for even stress distribution. Proprietary disc coating to prevent fretting and corrosion. Designed for years of dependable, low-maintenance performance.
Industry leader in power density
API-671 compliant
Best for reduced moment applications
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