China Best Sales CHINAMFG Rubber Flexible Expansion Galvanized Pipe Coupling

Product Description

 

ANSI screwed end rubber expansion joint for pipe

Technical Parameters and Raw Material

Nominal diameter(mm) 20~80 20~80
Nominal pressure(Mpa)  1.0  1.6
Testing pressure Seal(Mpa) 1.1 1.76
Explosion pressure(Mpa) 4.8 
Suitable temperature(°C) -15°C~110°C
Suitable medium Air,compressed air,water,seawater,hotwater,oil and acid
Threaded Connector Malleable Cast Iron
Key frame Nylon Cord Fabric
Inner/Outer Rubber EPDM/NBR/NR
Pressurised ring Steel wire

 

Overall Dimension and Weight

 

Size Length(mm)        
  Axial Displacement          
 

Horizontal

displacement (mm)

Deflexion

angle

Weight

(kg)

DN INCH Extrnsion   Compression
20 3/4 200 5~6 22 22     45° 0.9
25 1 200 5~6 22 22     45° 1.15
32 1.25 200 5~6 22 22     45° 1.4
40 1.5 200 5~6 22 22     45° 1.65
50 2 200 5~6 22 22     45° 2.25
65 2.5 265 8~10 24 24     45° 3.25
80 3 285 8~10 24 24     45° 4.2

Why Choose US

We test leakage of each roll before braiding, then we cut 300mm and crimp it to test
burst pressure after brading.

We use CNC Lathes Machine for end fittings production. Machine system, knife and inspection
tools are all imported from Japan.

We use Techmaflex Crimping Machine which is imported from France. This machine has
accurate and stable performance for crimping because it is produced for PTFE hose crimping only.

Contact to this supplier

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rubber coupling

Durometer Hardness in Rubber Coupling Materials

Durometer hardness is a measure of the material’s resistance to indentation or penetration by a specified indenter. In rubber couplings, durometer hardness is a critical characteristic that influences their performance. It is typically measured using a durometer instrument.

The durometer hardness scale commonly used for rubber materials is the Shore durometer scale, indicated by a letter followed by a numerical value (e.g., Shore A, Shore D). Lower durometer values indicate softer and more flexible rubber, while higher values indicate harder and less flexible rubber.

In relation to rubber couplings:

  • Higher Durometer (Harder Rubber): Couplings made from harder rubber materials have better torque transmission capabilities and higher load-bearing capacity. However, they may offer less vibration isolation and misalignment compensation.
  • Lower Durometer (Softer Rubber): Couplings made from softer rubber materials provide greater flexibility, vibration damping, and misalignment compensation. They are suitable for applications where vibration reduction is crucial.

The choice of durometer hardness depends on the specific requirements of the application, including torque levels, vibration, misalignment, and desired performance characteristics.

rubber coupling

Handling Torque and Vibration Suppression in Rubber Couplings

Rubber couplings are designed to effectively handle both high levels of torque transmission and vibration suppression. The flexibility and damping properties of rubber make it well-suited for these purposes:

  • Torque Transmission: Rubber couplings can transmit torque between shafts while accommodating angular misalignment. The rubber element flexes and deforms as torque is applied, allowing the coupling to transmit power even in misaligned conditions.
  • Vibration Suppression: Rubber’s inherent damping characteristics help absorb and dissipate vibrations and shocks generated during the operation of machinery. This feature reduces the transfer of vibrations to connected components, minimizing wear and enhancing overall system performance.

Engineers select the appropriate rubber material and coupling design to ensure that the coupling can effectively handle the required torque levels and provide the desired vibration suppression. Rubber couplings find applications in various industries where torque transmission and vibration damping are critical for smooth and reliable machinery operation.

rubber coupling

Types of Rubber Couplings Designed for Specific Uses

There are several types of rubber couplings, each designed with specific characteristics to suit various applications:

  • Flexible Jaw Couplings: These couplings consist of two hubs connected by a flexible rubber element. They are commonly used in applications where misalignment, vibrations, and shocks need to be dampened, such as in pumps, fans, and compressors.
  • Oldham Couplings: Oldham couplings use a rubber disk as the intermediate element between two hubs. They provide compensation for misalignment while maintaining a constant velocity between input and output shafts, often used in printing, packaging, and CNC machinery.
  • Tyre Couplings: These couplings have a high degree of torsional flexibility and are suitable for applications with substantial misalignment and shock absorption requirements, like in heavy-duty machinery and construction equipment.
  • Pin and Bush Couplings: These couplings use rubber bushes to provide vibration isolation and accommodate misalignment. They are used in various industrial applications, including conveyors, mixers, and crushers.
  • Diaphragm Couplings: Diaphragm couplings use a flexible rubber diaphragm to transmit torque and compensate for misalignment. They are commonly found in precision equipment like servo motors and robotics.

Each type of rubber coupling is designed to address specific needs in different applications. The choice of coupling depends on factors such as the degree of misalignment, torque requirements, shock absorption, and the level of precision needed.

China Best Sales CHINAMFG Rubber Flexible Expansion Galvanized Pipe Coupling  China Best Sales CHINAMFG Rubber Flexible Expansion Galvanized Pipe Coupling
editor by CX 2024-01-03

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