China Good quality China Exports Top Quality Flexible Rubber/ PTFE Expansion Joint Compensator Flange Coupling flange coupling

Product Description

Single Sphere Flexible Flange Rubber Expansion Joint Dismantling joint    


1.Service life up to 3 years.

2.Recycled rubber:0%

3.More than 55% rubber content. 4.Enough nylon layers to ensure high pressure resistance

5.Cooper plated steel wire 10 layer of Nylon cord

6.No rust,No thin,No sand holes,No leakage

7.Strong acid and alkali resistance,wear resistance,oil resistance,over food

8.Provide free after-sale service for new products, and pay the freight and tariff for after-sale products if there is quality problem

9.Above DN100 have the steel wire prevent it from being pulled off

10.Different length of molds for every size meets all special lengths need


Size: DN32 to DN1000
Class: PN10, PN16. PN25, 125LB, 150LB
Type: NBR/EPDM Body, Single sphere or double sphere, carbon steel galvanized flange, flanged end and threaded end, flange: Carbon steel

Material of different parts: 

1.Body: WCB/ zinc carbon steel 



3. Reinforcement: Nylon cord


PN10, PN16, PN25



Techinical Data:


Nominal Pressure PN(Mpa) 1.0 1.6
Burst Pressure(Mpa) 3.0 4.8
Working Temperature -20~115

water, air, oli, acid, etc

Strengths of expansion joint:
Small size, lightweight, easy to install and maitain, good performance, and with different color, different material quality.
Afcon Ninjing CHINAMFG Industries Co., Ltd is located in HangZhou City ZheJiang Province. Founded in 2571.CHINAMFG is 1 of the leading companies specializing in R&D, design and manufacturing of a full range of industrial valves made from premium materials. These include butterfly valves, check valves, Y strainers, rubber joints, gate valves and ball valves, as well as aluminum die casting and a wide range of related accessories for pipe fittings.Presently CHINAMFG hold all required certification such as ABS, CE, DNV-GL, ISO9001, LR for export needs.The products have been exported to Europe, Middle East, America, Africa and Asia Pacific areas. Many large projects have been successfully installed, with complete customer satisfaction, in different sectors of industries.CHINAMFG is fully equipped with an “in-house” CHINAMFG line and powder coating line catering not only to ensure direct QA and efficiency in the production process, but with the added reduction in our cost base.Presently our facilities cover an area of 50,000 square CHINAMFG with opportunity to expand our growth in export markets.With over 8 years of growth development and experience with our successful product research, manufacturing expertise and sales performance we have proven that “Quality IS our Business”.Welcome friends from all over the world to our company for visiting and cooperation.Our company is well equipped with all the advanced manufacturing equipments, including machining centers, CNC lathes, CNC milling machine, CNC drilling machine, automatic welding equipment and professional spray lines.AFCON also has independently established an advanced chemical laboratory. With the establishment of an advanced pressure test centers, it is full-equipped with universal materiai testing machine, pendulum impact testing machine, ultrasonic hardness tester, ultrasonic thickness gauge, magnetic detectors, ultrasonic nondestructive testing equipment, low temperature testing machine, cold stamping testing machine, the establishment of an advance pressure test center.

Dear Prospective Customer,
AFCON adheres to the following Core Values:
O Personal and Professional Working Relationships
O Complete Trust and Respect for each person on Our Team
O “Quality IS our Business”
With over 10 years of growth development and experience with our successful product research, manufacturing expertise and sales performance we have proven that “Quality IS our Business”.
Quality sets the guidelines and targets that we need to meet our Customers demands therefore ensuring we continually endeavor to strive for improvement with our  Research and Development, products and standards so they always meet with and satisfy the ever increasing needs and demands of our customers. 
We also have a specific focus to develop products that enhance ‘Safety’ and the workplace. We plan to release some innovative valves, especially in fire safe industries with API approval for this in the very near future.”
Our TEAM look CHINAMFG to meeting you in the near future .

Sales Tem of AFCON

Q: What is your payment term?
A: T/T 30% down payment, balance to be paid before shipment. Or LIC.
Q: How long is your delivery time?
A: Depends on QTY.
Q: Are you a manufacturer or trading company? How to reach your company from ZheJiang ?
A: We are a well-experienced manufacturer. And it is about 1.5 hours by high speed train from ZheJiang Nan Station.
Q: Do you provide samples? Is it free or charged?
A: Yes, we can offer sample free but shipping charges covered by customer.
Q: If products have some quality problem, how would you deal with?
A: We will responsible for all the quality problems if it is not human causes.


flange coupling

Factors to Consider When Choosing a Flange Coupling for a Specific System

When selecting a flange coupling for a specific system, several factors need to be taken into consideration to ensure optimal performance and reliability. Here are the key factors to consider:

  • 1. Load and Torque Requirements: Determine the maximum load and torque that the flange coupling will experience in the application. This includes both static and dynamic loads. Select a flange coupling that can handle these loads without exceeding its rated capacity.
  • 2. Shaft Diameter: Measure the diameter of the shafts that will be connected by the flange coupling. Ensure that the coupling’s bore size matches the shaft diameter to provide a proper fit and secure connection.
  • 3. Misalignment Tolerance: Consider the amount of misalignment that the system may experience during operation. Flange couplings are available in different designs, and some can accommodate higher levels of misalignment than others. Choose a coupling that can handle the expected misalignment to prevent premature wear and stress on the system.
  • 4. Operating Speed: Determine the rotational speed of the connected equipment. High-speed applications may require precision balancing and careful selection of materials to prevent issues like resonance and excessive vibration.
  • 5. Environmental Conditions: Consider the environmental factors the flange coupling will be exposed to, such as temperature, humidity, dust, and chemicals. Choose a material and coating that can withstand the specific environmental conditions to prevent corrosion and degradation.
  • 6. Space Limitations: Evaluate the available space for installing the flange coupling. Some applications may have limited space for coupling installation, requiring compact designs or custom solutions.
  • 7. Serviceability: Assess the ease of installation and maintenance of the flange coupling. A coupling that is easy to install and service can reduce downtime and maintenance costs.
  • 8. Compatibility: Ensure that the flange coupling is compatible with the equipment and shafts in the system. Consider factors such as keyways, set screws, and other connection methods.
  • 9. Material Selection: Choose the appropriate material for the flange coupling based on factors like load, temperature, and corrosion resistance. Common materials include steel, stainless steel, aluminum, and various alloys.
  • 10. Cost: Compare the cost of different flange coupling options, considering both the initial investment and long-term maintenance expenses. Balance the cost with the desired performance and reliability.

It is essential to consult with coupling manufacturers or industry experts to ensure the flange coupling’s suitability for the specific application. Properly selecting and installing the right flange coupling can contribute to the efficiency, reliability, and longevity of the connected machinery and system.

flange coupling

What Role Does a Flange Coupling Play in Minimizing Wear and Tear on Connected Components?

A flange coupling plays a critical role in minimizing wear and tear on connected components in rotating machinery. It accomplishes this by effectively transmitting torque between two shafts while accommodating misalignment and reducing the transmission of shock and vibration. Here’s how a flange coupling achieves these benefits:

  • Misalignment Compensation: Flange couplings are designed to accommodate both angular and parallel misalignment between the shafts they connect. As machinery operates, shafts may experience slight misalignment due to thermal expansion, manufacturing tolerances, or other factors. The flexible nature of certain flange coupling designs allows them to compensate for these misalignments, preventing excessive stress on connected components that could lead to wear.
  • Shock and Vibration Damping: Flange couplings help dampen shock and vibration during machinery operation. When a machine experiences sudden impacts or vibrations, the flexibility of some flange coupling types absorbs and disperses these forces. By reducing the transfer of shocks and vibrations to the connected components, flange couplings protect the machinery from excessive stress and premature wear.
  • Smooth Torque Transmission: Flange couplings provide a smooth and reliable means of transmitting torque from one shaft to another. The secure connection between the two shafts ensures that torque is efficiently transmitted without slippage or sudden jolts. This smooth torque transmission helps prevent unnecessary wear on the shafts and other connected components.
  • Reduced Maintenance: By minimizing wear and tear on connected components, flange couplings contribute to reduced maintenance requirements. When components experience less stress and wear, their lifespan is extended, resulting in fewer maintenance interventions and decreased downtime for repairs or replacements.
  • Protection Against Overloads: In cases of sudden overloads or torque spikes, flange couplings can act as a safety feature by allowing some degree of slippage or disengagement. This protects the connected machinery from potential damage caused by excessive loads.

In summary, a flange coupling’s ability to compensate for misalignment, dampen shocks and vibrations, provide smooth torque transmission, and protect against overloads makes it a crucial component in minimizing wear and tear on connected machinery. By choosing the appropriate flange coupling design for a specific application, engineers can enhance the reliability and longevity of the entire system while reducing maintenance and downtime costs.

flange coupling

Advantages of Flange Couplings in Mechanical Systems

Flange couplings offer several advantages in mechanical systems, making them a popular choice for connecting shafts in various applications:

  • High Torque Transmission: Flange couplings provide a rigid and secure connection between shafts, allowing for efficient transmission of high torque without slippage or power loss.
  • Precise Alignment: Proper alignment of flange couplings ensures that the connected shafts are in perfect axial alignment, reducing the risk of excessive bearing loads and increasing the longevity of the machinery.
  • Zero Backlash: Flange couplings have no play or free movement between the shafts, resulting in immediate torque transmission and precise motion control, especially in applications requiring precise positioning.
  • Robust and Durable: Flange couplings are typically made from high-quality materials such as steel, cast iron, or aluminum, providing excellent durability and resistance to wear and corrosion.
  • Wide Range of Sizes and Torque Capacities: Flange couplings are available in various sizes and configurations, allowing them to be used in a wide range of applications with different torque requirements.
  • Simple Installation: Installing flange couplings is relatively straightforward, requiring alignment and fastening of the flanges with bolts and nuts.
  • Wide Application Range: Flange couplings are used in various industries, including heavy machinery, pumps, compressors, marine propulsion, and power generation equipment.
  • Suitable for High-Speed Applications: Flange couplings can handle high rotational speeds, making them suitable for applications requiring high-speed power transmission.
  • Minimal Maintenance: Once properly installed, flange couplings require minimal maintenance, reducing downtime and operational costs.

Despite their advantages, flange couplings also have some limitations. They lack the ability to compensate for misalignment like flexible couplings, which can lead to increased stress on bearings and other components if not correctly aligned. Additionally, the rigid nature of flange couplings means they may not be suitable for applications where shaft misalignment is common or where shock and vibration absorption is required.

Overall, flange couplings are a reliable and robust choice for mechanical systems, particularly in applications demanding high torque transmission and precise shaft alignment. Proper installation and maintenance are crucial to ensure optimal performance and longevity of both the coupling and the connected machinery.

China Good quality China Exports Top Quality Flexible Rubber/ PTFE Expansion Joint Compensator Flange Coupling  flange couplingChina Good quality China Exports Top Quality Flexible Rubber/ PTFE Expansion Joint Compensator Flange Coupling  flange coupling
editor by CX 2023-09-21