Product Description

Universal Coupling / Pipe Coupling/ Gibault Coupling
Range of Size:  1 1/2” – 32” (DN40-800mm)
Pressure : PN10/PN16 

1. Description: 

Universal Couplings offer an easy and economical way of joining pipe- whether the pipe is of the same nominal size and/or type or different at each couplings end .
Universal Couplings will handle most of waterworks couplings needs and are capable of connecting most classes of water pipe.

2. Application : 

*  used for pipe connection .
*  suit for Ductile Iron Pipe, Cast Iron Pipe, Steel, Asbestos Cement Pipe, PE, PVC, HDPE Pipe and etc.
*  Working pressure:  PN10 / PN16
*   Suit for Water, Neutral Liquids and Sewage

3. Features :

*   wide range of tolerance
*   corrosion resistance
*   allow angular deflection of +/- 4°

4. Material Sheet :

4.  List of Sizes :

S/N	Size	O.D Range	Sleeve Length	Bolts
	mm	mm	mm	mm
1	DN40	48-60	98	M12x170
2	DN50	59-73	98	M12x170
3	DN65	72-85	98	M12x170
4	DN80	88-103	98	M12x180
5	DN100	96-116	98	M12x180
6		108-120	98	M12x190
7		109-128	98	M12x180
8	DN125	132-146	98	M12x180
9		138-153	98	M12x180
10	DN150	158-172	105	M12x200
11		159-182	110	M12x200
12	DN175	192-210	130	M12x210
13	DN200	198-225	130	M12x210
14		218-235	130	M12x220
15	DN250	242-262	130	M12x220
16		250-267	130	M12x220
17		250-274	130	M12x220
18		272-289	130	M12x220
19	DN300	315-332	130	M12x220
20		322-339	130	M12x220
21	DN350	340-360	130	M12x220
22		351-378	130	M14x230
23		374-391	130	M14x230
24	DN400	390-410	130	M14x220
25		398-430	140	M14x270
26		417-437	130	M14x240
27		425-442	130	M14x240
28	DN450	450-463	130	M14x270
29		455-475	130	M14x270
30		476-500	130	M14x270
31	DN500	500-508	130	M16x270
32		500-533	140	M14x280
33		526-546	130	M14x270
34	DN600	600-630	130	M14x270
35		608-636	130	M14x270
36		630-650	130	M14x270
37	DN700	710-739	155	M16x280
38	DN800	816-842	180	M16x330

4. Project Cases :
 

5. Joint Series :

6. Company Profile :
 

HangZhou CHINAMFG Pipeline Co., Ltd is the professional chinese supplier and exporter of repair clamps and coupling for water lines with working pressure PN10/16 . The range of our products including Universal Coupling, Universal Flange Adaptor, Restraint Coupling, Restraint Flange Adaptor, Step Coupling, Repair Clamps and etc . 
Our product conform the international standard ISO2531, BS EN545 EN598 .
We export to many countries including USA, UK, Spain, Australia, Russia, Indonesia, Singapore, Malaysia and etc. 

7. Certificates : 

8. Contact us :
 

Maintenance Requirements for Flexible Flange Couplings

Proper maintenance is essential to ensure the optimal performance and longevity of flexible flange couplings. Regular inspections and maintenance routines can help detect and prevent potential issues before they escalate into major problems. Here are the key maintenance requirements for flexible flange couplings:

• Visual Inspections: Regularly inspect the coupling for any signs of wear, damage, or misalignment. Look for cracks, tears, or deformations in the elastomeric elements and ensure that the flanges are securely fastened.
• Lubrication: Some flexible flange couplings may require periodic lubrication at the flange interface or other moving parts. Check the manufacturer’s guidelines for the recommended lubrication schedule and use the appropriate lubricant.
• Torque Checks: Verify that the flange bolts or screws are tightened to the specified torque. Loose fasteners can lead to misalignment and reduce the coupling’s performance.
• Alignment: Ensure that the connected shafts are correctly aligned. Misalignment can cause increased stress on the coupling and lead to premature failure. If misalignment is detected, it should be corrected promptly.
• Environmental Protection: In harsh environments, such as those with high humidity, chemicals, or abrasive particles, consider implementing protective measures to shield the coupling from potential damage.
• Inspections After Shock Loads: If the coupling is subjected to shock loads or excessive stress, perform thorough inspections to check for any deformation or damage that may have occurred.
• Replace Worn Elements: Over time, the elastomeric elements of the coupling may wear out. Replace these elements when they show signs of deterioration to maintain the coupling’s performance.

It is important to follow the manufacturer’s maintenance guidelines and recommendations specific to the particular flexible flange coupling model being used. Regular maintenance not only ensures the coupling’s optimal performance but also enhances the safety of the overall mechanical system.

Real-World Examples of Successful Flexible Flange Coupling Installations and Their Benefits

There are numerous real-world examples of successful flexible flange coupling installations that have demonstrated significant benefits in various industrial applications. Here are some notable examples:

Example 1: Industrial Pumps

In an industrial pumping system used for fluid transfer, the existing rigid coupling was causing excessive vibration and wear on the pump and motor bearings. The vibrations were leading to frequent maintenance and downtime. After retrofitting with flexible flange couplings, the system experienced a drastic reduction in vibration levels. The couplings effectively dampened vibrations and accommodated minor misalignments, resulting in smoother operation and longer bearing life. The benefits included reduced maintenance costs and increased overall system reliability.

Example 2: Marine Propulsion

In a marine propulsion system, the conventional coupling was not effectively dampening the torsional vibrations generated by the engine. This vibration was affecting the comfort of passengers and causing stress on the drivetrain components. By installing a flexible flange coupling, the system’s torsional stiffness was optimized, and the vibrations were significantly reduced. The result was a smoother and quieter ride for passengers, reduced wear on components, and improved fuel efficiency.

Example 3: Compressors

In a gas compressor application, the existing coupling was unable to handle the misalignment between the driver and driven shafts, leading to premature coupling failures. By replacing the coupling with a flexible flange coupling that could accommodate both angular and axial misalignment, the system experienced improved reliability and reduced unplanned downtime. The flexible coupling also helped reduce peak torque loads during start-up, minimizing stress on the system and extending the equipment’s lifespan.

Example 4: Wind Turbines

Wind turbines require couplings that can handle varying wind conditions and torque fluctuations. Flexible flange couplings have been successfully implemented in wind turbine drivetrains, allowing them to withstand the dynamic loads and misalignments experienced in the field. The flexibility of these couplings ensures smooth power transmission and helps protect the gearbox and generator from damaging vibrations, contributing to the long-term performance and reliability of the wind turbine.

Overall, flexible flange couplings have proven to be reliable and effective solutions in various industries. Their ability to dampen vibrations, accommodate misalignments, and transmit high torque makes them valuable components for improving the performance, efficiency, and lifespan of mechanical systems and equipment.

These real-world examples highlight the versatility and benefits of flexible flange couplings, and they serve as successful case studies for the advantages of using these couplings in diverse industrial applications.

Torque and Speed Limits for Flexible Flange Coupling Designs

Flexible flange couplings come in various designs, each with its specific torque and speed limits. These limits are essential considerations when selecting the appropriate coupling for a particular application. The following factors influence the torque and speed limits:

• Coupling Material: The material used in the flexible flange coupling plays a crucial role in determining its torque and speed limits. Couplings made from materials with higher tensile and shear strength, such as steel or alloy, can handle higher torque loads and operate at higher speeds compared to those made from elastomeric materials.
• Elastomer Hardness: For flexible flange couplings with elastomeric elements, the hardness of the elastomer affects the torque and speed limits. Softer elastomers generally offer greater flexibility and misalignment accommodation but may have lower torque and speed ratings. Harder elastomers can handle higher torque and speed but provide less flexibility.
• Coupling Size: The physical size of the coupling also impacts its torque and speed limits. Larger couplings, with more substantial and thicker flanges and elastomer elements, can generally handle higher torque loads and operate at higher speeds.
• Design and Construction: The design and construction of the flexible flange coupling influence its overall strength and performance. Couplings with optimized designs, precision machining, and robust construction can withstand higher torque and speed levels.
• Application Requirements: The specific requirements of the application, such as the level of misalignment, the magnitude of torque loads, and the desired rotational speed, will determine the suitable flexible flange coupling with the appropriate torque and speed limits.

Manufacturers of flexible flange couplings provide detailed specifications, including torque and speed ratings, for each coupling design they offer. It is crucial to adhere to these specified limits to ensure the safe and reliable operation of the coupling in the intended application.

During the selection process, engineers and designers should carefully match the torque and speed requirements of the application with the capabilities of the chosen flexible flange coupling. This ensures that the coupling operates optimally and provides long-lasting and efficient power transmission in the mechanical system.

editor by CX 2023-12-14