FLEXIBLE DIAPHRAGM COUPLINGS
Diaphragm couplings
OVERVIEW
John Crane’s Metastream® M-Series diaphragm couplings
John Crane designs solutions that support consistent performance in applications requiring accurate torque transmission and misalignment capability.
John Crane’s Metastream® M-Series diaphragm couplings are designed with features to increase the safety, reliability, productivity and profitability of your plant.
These diaphragm couplings meet the requirements of API 610 as standard and are suitable for use across a wide range of industries, including:
- Turbomachinery – supports accurate torque transmission in high-speed rotating equipment
- Oil and gas – helps manage misalignment and torque loads in pumps and compressors
- Power generation – enables stable power transmission in turbine generator systems
- Wastewater – maintains reliable operation in centrifugal and potable water pump
Explore our M-Series diaphragm couplings
High-performance MHS series diaphragm coupling solutions
M-Series Multiple Membrane Straight Diaphragm Coupling with Stainless Steel Discs in Pre-assembled Single Diaphragm Packs...
MOD series diaphragm coupling solutions
M Series Multiple Membrane Straight Diaphragm Coupling with Stainless Steel Discs in Pre-assembled Double Diaphragm Pack...
IN MORE DETAIL
John Crane Metastream® diaphragm couplings in more detail
John Crane Metastream® diaphragm couplings feature a multiple-disc (membrane), straight diaphragm design.
Like other flexible diaphragm couplings, this allows the coupling to disconnect the drive from the driven machine in the event of a torque overload or excessive misalignment that causes the diaphragm coupling to fail.
The pre-assembled pack includes the John Crane Metastream® diaphragm coupling design, and incorporates a safety device.
In the event of a diaphragm coupling failure, it allows the equipment to be shut down safely while helping to prevent extra damage.
Due to the pre-assembled pack(s), any damaged diaphragm packs can be easily and quickly replaced to help minimise downtime.
Applications for diaphragm couplings include centrifugal pumps, potable water pumps and pipeline compression machinery.
John Crane Performance Plus™
John Crane Performance Plus™ is our modular service framework, supported by the largest mechanical seal service network, with over 200 manufacturing, sales and service centres globally. That means we are where you need us, when you need us – empowering people, plant and performance.
Common questions
What is a diaphragm coupling?
A diaphragm coupling is a type of flexible power transmission coupling that uses thin metal diaphragm elements to transmit torque between shafts. John Crane’s diaphragm couplings are designed to accommodate misalignment while maintaining accurate, lubrication-free power transmission in demanding industrial and turbomachinery applications.
How does a diaphragm coupling work?
A diaphragm coupling works by flexing metal diaphragm elements to accommodate angular, axial and parallel misalignment while transferring torque between connected shafts.
How do you decouple a diaphragm coupling?
Decoupling a diaphragm coupling typically involves securing the equipment, relieving load and separating the coupling components according to the manufacturer’s instructions. John Crane recommends following application specific installation instructions and recognised industry practices to ensure proper alignment, safe operation and reliable performance of disc coupling assemblies.
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