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Help CenterStainless Steel 304 Coupling Diaphragm Disc for Pump and Compressor Applications High Cycle Fatigue Tested
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Hebei Speed Torque Transmission Technology Co., Ltd., established in 2017, is a professional manufacturer specializing in high-quality power transmission components. Operating from a 3,000–5,000 square meter facility in Cangzhou, Hebei, with an annual export value of US$5–10 million and a team of 101–200 employees, we deliver reliable solutions to markets worldwide including North America, Europe, Southeast Asia, and the Middle East. Our Stainless Steel 304 Coupling Diaphragm Disc for Pump and Compressor Applications is engineered to meet the most demanding industrial requirements — precision, durability, and long service life. Each disc undergoes rigorous high-cycle fatigue testing to ensure consistent performance under repetitive stress, making it an ideal choice for critical rotating equipment.
This diaphragm disc coupling component is designed to accommodate misalignment, reduce vibration, and transmit torque smoothly without backlash. Crafted from premium Stainless Steel 304, it offers excellent corrosion resistance and strength, suitable for harsh environments such as chemical processing, oil & gas, and water treatment. Whether used in centrifugal pumps, reciprocating compressors, or other rotating machinery, our disc delivers reliable power transfer with minimal maintenance.
Key Features & Technical Advantages
High Cycle Fatigue Tested: Each disc is subjected to accelerated life testing to simulate millions of operational cycles, ensuring exceptional fatigue resistance and long-term reliability.
Premium Material – Stainless Steel 304: Offers superior corrosion resistance, high strength-to-weight ratio, and excellent performance in temperatures from -20°C to 300°C.
Precision Machining: Manufactured with CNC technology to achieve tight tolerances (e.g., concentricity ≤ 0.02 mm) for minimal vibration and smooth operation.
Flexible Design: Accommodates angular, parallel, and axial misalignments, reducing stress on connected equipment such as pumps and compressors.
Low Moment of Inertia: Lightweight disc design minimizes inertia, ideal for high-speed applications requiring quick starts and stops.
Maintenance-Free Operation: No lubrication required, reducing downtime and operating costs.
Customizable Options: Available in various thicknesses, outer diameters, and bolt-hole patterns to fit specific coupling systems.
Technical Specifications
| Material | Stainless Steel 304 (1.4301) |
| Hardness | HRB 80–90 (annealed condition) |
| Fatigue Life | ≥ 10 million cycles (tested at rated torque) |
| Operating Temperature | -20°C to +300°C |
| Thickness Range | 0.5 mm – 6.0 mm (customizable) |
| Outer Diameter Range | 50 mm – 500 mm (customizable) |
| Surface Finish | 2B / BA / Custom |
| Certification | ISO9001:2015 |
Customer Benefits
Reduced Downtime: High fatigue resistance means fewer replacements and extended maintenance intervals for pumps and compressors.
Enhanced Reliability: Rigorous testing ensures consistent performance under cyclic loads, critical for continuous processes.
Cost-Effective: Eliminates lubricants and reduces spare part inventory while improving energy efficiency through low inertia.
Versatile Compatibility: Fits many standard coupling hubs; custom hole patterns available for OEM applications.
At Hebei Speed Torque Transmission Technology Co., Ltd., quality is our foundation. Our manufacturing facility operates under ISO9001:2015 certified processes, and we have exported products worth over US$5 million annually to more than 15 countries across North America, South America, Europe, Asia, and Africa. Every diaphragm disc is batch-tested for fatigue life, dimensional accuracy, and material composition to meet your exact requirements. With flexible shipping from Ports of Shanghai, Tianjin, and Qingdao, we deliver on time, every time.
Choose our Stainless Steel 304 Coupling Diaphragm Disc – engineered for the toughest pump and compressor applications. Backed by a professional team of 101–200 employees, we offer customization, fast quotations, and technical support. Contact us today for a competitive solution that keeps your machinery running smoothly.
Frequently Asked Questions (FAQ)
Q1: What is the maximum torque capacity of the diaphragm disc?
A: Torque capacity depends on disc thickness and outer diameter. For example, a standard 150 mm OD disc with 2 mm thickness can transmit up to 250 Nm. Please provide your requirements for a precise calculation.Q2: Can this disc be used for high-speed compressors exceeding 10,000 RPM?
A: Yes, due to its low moment of inertia and high fatigue strength, it is suitable for high-speed applications up to 15,000 RPM. We recommend dynamic balancing for speeds above 8,000 RPM (available upon request).Q3: Is the disc compatible with existing coupling hubs from other brands?
A: The disc can be customized with specific bolt-hole patterns and outer diameters to fit most standard coupling hubs. Please provide hub dimensions for compatibility check.Q4: What kind of maintenance is required for the diaphragm disc?
A: The disc is maintenance-free – no lubrication needed. Regular visual inspection for cracks or deformation is recommended. Under normal operating conditions, replacement intervals exceed 5 years.Q5: Do you provide samples for testing?
A: Yes, sample orders are accepted. We can produce prototype discs according to your drawing or specification. Lead time for samples is typically 7–15 days.Q6: What is the corrosion resistance of 304 stainless steel in marine environments?
A: Stainless Steel 304 offers good resistance to atmospheric corrosion and mild chemical exposure. For saltwater or highly corrosive environments, we recommend upgrading to 316L or duplex material. Contact our technical team for guidance.Q7: How do you ensure consistent quality across large batches?
A: Our ISO9001:2015 certified quality system includes incoming material inspection (spectrometer analysis), in-process dimensional checks (CMM), and 100% fatigue testing on each batch. A quality certificate is provided with every shipment.Q8: What is the typical lead time for bulk orders?
A: For standard sizes, lead time is 15–20 working days after confirmation. Custom orders may require 25–30 days. We offer partial shipments if urgent quantities are needed.
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