Diaphragm Coupling

Understanding Diaphragm Couplings

Diaphragm couplings transmit torque through thin, flexible metal diaphragms bolted together and connected to the driving and driven hubs. The flexing of these diaphragms accommodates angular, axial, and (with double-diaphragm designs incorporating a spacer) parallel misalignment between shafts. Their all-metal construction allows for high performance characteristics.

Key Advantages:

• Zero Backlash: Solid metallic torque path ensures absolutely no backlash, critical for precise positioning and control systems.
• High Speed & Low Vibration: Inherently balanced design and low mass allow operation at very high speeds with minimal vibration. Essential for turbomachinery-coupling applications.
• High Torsional Stiffness: Provides excellent resistance to torsional deflection, ensuring accurate torque transfer.
• Maintenance-Free & No Lubrication: All-metal construction eliminates the need for lubrication and routine maintenance.
• High Misalignment Capability: Can accommodate significant angular, axial, and parallel (double diaphragm) misalignment.
• Wide Temperature Range: Suitable for operation in extreme temperature environments.
• API 671 Compliance: Can be designed and manufactured to meet the stringent requirements of API 671 for special-purpose couplings in petroleum, chemical, and gas industry services.

Common Configurations:

• Single Diaphragm Pack: Accommodates primarily angular and axial misalignment.
• Double Diaphragm Pack (with Spacer): Accommodates angular, axial, AND significant parallel misalignment. Spacer length is customizable.

Shreeji Gears: Your Ahmedabad Diaphragm Coupling Specialist

We manufacture precision-engineered diaphragm couplings designed for maximum reliability and performance in the most demanding industrial applications.

Why Choose Shreeji Gears for Diaphragm Couplings?

• Precision Manufacturing: Utilizing advanced CNC machining for hubs and spacers, and precise methods for diaphragm production (profiling, etching).
• Material Science Expertise: Selecting appropriate high-strength stainless steels and alloys (Inconel, etc.) for diaphragms and components based on application demands.
• Critical Balancing: Employing dynamic balancing techniques to ensure smooth operation at high rotational speeds, meeting stringent balance quality grades (e.g., ISO G2.5 or better).
• API 671 Design Capability: Experience in designing and manufacturing couplings compliant with API 671 standards, including material traceability, NDT, and documentation requirements.
• Custom Engineering: Tailoring designs for specific torque, speed, misalignment, space, and environmental requirements.
• Finite Element Analysis (FEA): Utilizing FEA for design validation and optimization of stress distribution and fatigue life in critical applications.
• Quality Assurance: Rigorous inspection protocols covering materials, dimensions, assembly, balancing, and documentation.

General Technical Specifications (Customizable):

• Type: Single Diaphragm, Double Diaphragm (Spacer Coupling).
• Diaphragm Material: High Grade Stainless Steel (e.g., 15-5PH, 17-4PH), Inconel.
• Hub/Spacer Material: Alloy Steel (e.g., 4140, 4340), Stainless Steel.
• Bore Range: Custom manufactured (e.g., 50mm to 500mm+).
• Torque Rating: Wide range, suitable for high power applications (Specify requirements in kNm).
• Max Speed: Very high speed capability (e.g., >20,000 RPM), dependent on size and balancing.
• Misalignment: Specific values for Angular, Axial, Parallel depend on size and design.
• Temperature Range: Suitable for wide or extreme temperature ranges (e.g., -50°C to +250°C or higher).
• Compliance: Options for API 671, ATEX certification.

Ensure ultimate reliability and performance in critical high-speed applications. Choose Shreeji Gears, your specialist diaphragm coupling manufacturer in Ahmedabad. Contact us today to discuss your demanding turbomachinery and process coupling requirements!