Product Description

Stainless Steel Grooved Pipe Coupling 2” DN50mm 600psi (4.0Mpa)

 1. Available Size: 
3/4” – 12” ( DN20-DN300mm) 

 2. Maximum Working Pressure : 
 * 600 CZPT ( 40 bar) 
 *  working pressure dependent on material, wall thickness and size of pipe .

3. Application: 
Provides a flexible pipe joint which allows for expansion, contraction and deflection
*  This product joints standard Sch 40S cut grooved pipe  
*  Suit for pipeline medium including cold water, hot water, rare acid, Oil-free air and chemical

4. Material 

   Body Material : SS304, SS316, SS316L, SS CE8MN, SS Duplex 2204, SS Duplex 2507 
   Rubber Sealing : EPDM 
   Bolt & Nut :  SS304, SS316 

5.  Dimension Sheet : 
           Typical for all sizes 


Model S30 Stainless Steel Flexible Coupling
Nominal Size Pipe O.D Working Pressure  Pipe End Separation Coupling Dimensions Coupling Bolts
X Y Z Qty Size
mm/inch (mm/inch) (psi/bar) (mm/inch) mm/inch mm/inch mm/inch pcs mm
20           3/4 26.9   1.050 600                          42  0-1.6                  0-0.06 47                   1.850 87                3.425 43              1.693 2 M10x40
25                       1 32            1.260 500            35 0-1.6                  0-0.06 53             2.087 90    3.543 43     1.693 2 M10x45
32               1 1/4 38     1.496 500              35 0-1.6                  0-0.06 58          2.283 94        3.700 44        1.732 2 M10x45
32               1 1/4 42.4   1.660 500             35 0-1.6                  0-0.06 62      2.441 106  4.173 44        1.732 2 M10x45
40                  1 1/2 48.3   1.900 500            35 0-1.6                  0-0.06 67      2.638 106   4.173 43     1.693 2 M10x45
50                      2 57     2.244 500            35 0-1.6                  0-0.06 77       3.031 116   4.567 43    1.693 2 M10x50
50               2 60.3   2.375 500            35 0-1.6                  0-0.06 78            3.071 117    4.606 43     1.693 2 M10x50
65               2 1/2 73        2.875 500             35 0-1.6                  0-0.06 94         3.700 134   5.275 44        1.732 2 M10x50
65               2 1/2 76.1       3.000 500             35 0-1.6                  0-0.06 94         3.700 134   5.275 44        1.732 2 M10x50
80               3 88.9     3.500 500             35 0-1.6                  0-0.06 110         4.330 150   5.905 45       1.771 2 M10x50
100               4 108     4.250 450           31 0-3.2                 0-0.13 135         5.315 184   7.244 47     1.850 2 M12x60
100               4 114   4.500 450           31 0-3.2                 0-0.13 139        5.472 190  7.480 48    1.890 2 M12x60
125               5 133   5.250 400           28 0-3.2                 0-0.13 164        6.456 215   8.465 48    1.890 2 M12x60
125               5 141.3   5.563 400           28 0-3.2                 0-0.13 168       6.614 215   8.465 48    1.890 2 M12x60
150              6 159   6.259 350           25 0-3.2                 0-0.13 190      7.480 240  9.448 49    1.929 2 M12x70
150              6 168.3  6.625 350           25 0-3.2                 0-0.13 198      7.795 246     9.685 49    1.929 2 M12x70
200             8 219.1  8.625 350           25 0-3.2                 0-0.13 253  9.961 318    12.519 57    2.244 2 M12x70
250           10 273   10.750 300           21 0-3.2                 0-0.13 315   12.401 396  15.590 59         2.322 2 M20x110
300            12 323.9  12.750 300           21 0-3.2                 0-0.13 372  14.645 452  17.795 60      2.362 2 M20x110


flexible coupling

Can flexible couplings accommodate variable operating conditions and loads?

Yes, flexible couplings are designed to accommodate variable operating conditions and loads in mechanical systems. They offer several features that allow them to adapt to changing conditions and handle different loads effectively. Below are the reasons why flexible couplings are well-suited for such applications:

Misalignment Compensation: Flexible couplings can handle misalignment between shafts, including angular, parallel, and axial misalignment. This capability allows them to accommodate slight shifts in shaft positions that may occur due to thermal expansion, vibration, or other factors, ensuring smooth operation even in changing conditions.

Shock and Vibration Absorption: Flexible couplings can dampen shocks and vibrations that result from sudden changes in load or operating conditions. The flexible element in the coupling acts as a buffer, absorbing and reducing the impact of sudden loads or transient forces, protecting connected equipment and increasing system reliability.

Variable Load Capacity: Flexible couplings come in various designs and materials, each with its load capacity range. Manufacturers provide different coupling models with varying load capacities to accommodate different applications. Properly selecting the right coupling for the specific load conditions ensures reliable power transmission even under varying loads.

Compensation for Thermal Expansion: Temperature changes can cause thermal expansion in mechanical systems, leading to shaft misalignment. Flexible couplings can handle the resulting misalignment, compensating for thermal expansion and ensuring continuous and smooth power transmission.

Torsional Stiffness: Flexible couplings are designed with a balance between flexibility and torsional stiffness. This property allows them to adapt to variable loads while still providing the necessary rigidity for efficient power transmission.

Durable Materials and Designs: Manufacturers produce flexible couplings from durable materials like stainless steel, aluminum, or engineered elastomers. These materials ensure that the couplings can withstand varying operating conditions, including temperature fluctuations, harsh environments, and high loads.

Dynamic Behavior: Flexible couplings have a dynamic behavior that enables them to operate smoothly and efficiently under changing loads and speeds. They can handle variations in rotational speed and torque while maintaining consistent performance.

Application Flexibility: Flexible couplings find applications in a wide range of industries, from automotive and aerospace to industrial and marine. Their versatility allows them to accommodate variable operating conditions and loads in different systems.

Summary: Flexible couplings are well-suited for applications with variable operating conditions and loads. Their ability to compensate for misalignment, absorb shocks and vibrations, and handle thermal expansion make them reliable components in mechanical systems. The availability of various coupling designs and materials allows for the selection of the appropriate coupling based on the specific application requirements, ensuring optimal performance and longevity in variable conditions.

flexible coupling

What are the common signs of wear and failure in flexible couplings?

Flexible couplings can experience wear and failure over time, which may lead to operational issues and potential equipment damage. Some common signs of wear and failure in flexible couplings include:

  • Excessive Vibrations: An increase in vibrations during operation can indicate wear or misalignment in the flexible coupling. Excessive vibrations can also lead to additional wear on connected equipment.
  • Strange Noises: Unusual noises, such as squealing, rattling, or clunking sounds, may indicate misalignment, fatigue, or damaged elements in the flexible coupling.
  • Increased Heat: If a flexible coupling is operating at a higher temperature than usual, it could indicate increased friction due to wear or improper lubrication.
  • Visible Damage: Physical inspection may reveal visible signs of wear, such as cracks, tears, or distortion in the flexible coupling’s components.
  • Reduced Performance: A decrease in the performance of the connected machinery, such as lower speed or torque transmission, may be a sign of coupling wear.
  • Looseness or Play: Excessive play or looseness in the coupling may indicate worn or damaged components, which can lead to misalignment and decreased efficiency.
  • Leakage: In the case of fluid-filled couplings, leakage of the fluid can indicate seal damage or wear in the coupling.
  • Cracks or Corrosion: Cracks or signs of corrosion on metallic components of the coupling can indicate material fatigue or exposure to harsh environmental conditions.
  • Uneven Wear: Uneven wear patterns on coupling elements or unusual wear at specific points can be indicative of misalignment or excessive torque.
  • Increased Friction: If the flexible coupling starts to exhibit increased resistance or friction during operation, it may be a sign of wear or inadequate lubrication.

Regular maintenance and inspection are essential to identify these signs of wear and failure early on and prevent further damage to the flexible coupling and connected equipment. Timely replacement or repair of worn or damaged components can help maintain the reliability and efficiency of the system.

flexible coupling

What are the differences between elastomeric and metallic flexible coupling designs?

Elastomeric and metallic flexible couplings are two distinct designs used to transmit torque and accommodate misalignment in mechanical systems. Each type offers unique characteristics and advantages, making them suitable for different applications.

Elastomeric Flexible Couplings:

Elastomeric flexible couplings, also known as flexible or jaw couplings, employ an elastomeric material (rubber or similar) as the flexible element. The elastomer is typically molded between two hubs, and it acts as the connector between the driving and driven shafts. The key differences and characteristics of elastomeric couplings include:

  • Misalignment Compensation: Elastomeric couplings are designed to handle moderate levels of angular, parallel, and axial misalignment. The elastomeric material flexes to accommodate the misalignment while transmitting torque between the shafts.
  • Vibration Damping: The elastomeric material in these couplings offers excellent vibration dampening properties, reducing the transmission of vibrations from one shaft to another. This feature helps protect connected equipment from excessive vibrations and enhances system reliability.
  • Shock Load Absorption: Elastomeric couplings can absorb and dampen shock loads, protecting the system from sudden impacts or overloads.
  • Cost-Effective: Elastomeric couplings are generally more cost-effective compared to metallic couplings, making them a popular choice for various industrial applications.
  • Simple Design and Installation: Elastomeric couplings often have a straightforward design, allowing for easy installation and maintenance.
  • Lower Torque Capacity: These couplings have a lower torque capacity compared to metallic couplings, making them suitable for applications with moderate torque requirements.
  • Common Applications: Elastomeric couplings are commonly used in pumps, compressors, fans, conveyors, and other applications that require moderate torque transmission and misalignment compensation.

Metallic Flexible Couplings:

Metallic flexible couplings use metal components (such as steel, stainless steel, or aluminum) to connect the driving and driven shafts. The metallic designs can vary significantly depending on the type of metallic coupling, but some general characteristics include:

  • High Torque Capacity: Metallic couplings have higher torque transmission capabilities compared to elastomeric couplings. They are well-suited for applications requiring high torque handling.
  • Misalignment Compensation: Depending on the design, some metallic couplings can accommodate minimal misalignment, but they are generally not as flexible as elastomeric couplings in this regard.
  • Stiffer Construction: Metallic couplings are generally stiffer than elastomeric couplings, offering less vibration dampening but higher torsional stiffness.
  • Compact Design: Metallic couplings can have a more compact design, making them suitable for applications with limited space.
  • Higher Precision: Metallic couplings often offer higher precision and concentricity, resulting in better shaft alignment.
  • Higher Cost: Metallic couplings are typically more expensive than elastomeric couplings due to their construction and higher torque capacity.
  • Common Applications: Metallic couplings are commonly used in high-speed machinery, precision equipment, robotics, and applications with high torque requirements.


In summary, the main differences between elastomeric and metallic flexible coupling designs lie in their flexibility, torque capacity, vibration dampening, cost, and applications. Elastomeric couplings are suitable for applications with moderate torque, misalignment compensation, and vibration dampening requirements. On the other hand, metallic couplings are chosen for applications with higher torque and precision requirements, where flexibility and vibration dampening are less critical.

China manufacturer 2′ ′ 500psi Stainless Steel Grooved Flexible Coupling in Stock  China manufacturer 2′ ′ 500psi Stainless Steel Grooved Flexible Coupling in Stock
editor by CX 2023-09-07