Double Sphere Rubber Flexible Joints

Short Description:

Product: Double Sphere Rubber Flexible Joints
Material: Carbon Steel/Stainless Steel
Working Temperature: -15~80ºC(-30~+150ºC)
Connection mode: Flange
Acceptance: OEM/ODM, Trade, Wholesale, Regional Agency,
Payment: T/T, L/C, PayPal

Any inquiries we are happy to reply, please send your questions and orders.
Stock Sample is Free & Available

Product Detail





Product Tags

Product Introduction






Carbon Steel:

Stainless Steel:

Working Temperature



Double sphere rubber expansion joint is a compensation device used in pipeline systems, usually used to absorb thermal expansion, contraction, or mechanical displacement caused by temperature changes, vibration, or other factors in pipelines.


Double spherical rubber expansion joints are usually composed of multiple components that work together to achieve their function of absorbing thermal expansion, contraction, and mechanical displacement.

1. Spherical rubber body:

The core of the double spherical rubber expansion joint is a spherical expansion body made of soft rubber or rubber like materials. These rubber spheres can withstand compression, tension, and bending, allowing for thermal expansion, contraction, and mechanical displacement in the pipeline system.

2. Flange or connecting part:

The two ends of the double spherical rubber expansion joint are usually connected to the pipeline system through flanges or other connection methods. These connecting parts provide connection points to integrate the expansion joint with the pipeline system.

3. Metal support components:

In order to enhance the stability and pressure resistance of the structure, double spherical rubber expansion joints usually include metal support components. These supports are located inside the rubber body, which can help share internal forces and provide better structural support.

4. Flange sealing gasket:

If the connecting part is a flange, a sealing gasket is usually used to ensure the sealing of the connection and prevent medium leakage.

5. Bolts and nuts:

bolts and nuts used to connect flanges or other connecting parts. These bolts are commonly used to tightly secure double spherical rubber expansion joints to pipeline systems.


1. Absorption of thermal expansion and contraction:

Mainly designed to absorb the thermal expansion and contraction caused by temperature changes in pipelines.

2. Reduce vibration:

It can slow down the vibration transmission of pipeline systems and help protect connecting components and equipment.

3. Provide mechanical displacement:

Allow mechanical displacement to occur in the pipeline system, thereby reducing stress on the pipeline and related equipment.

4. Prevent pipeline rupture:

It can prevent pipeline rupture due to stress concentration during internal or external pressure fluctuations in the system.

Advantages and disadvantages

1. It can effectively absorb the displacement caused by thermal expansion and contraction.

2. Reduce vibration transmission and improve system stability.

3. Relatively simple structure and installation.


1. Customized design may be required under high pressure or extreme temperature conditions.

2.For large displacement and large-diameter pipelines, more complex designs may be required.

Application scope

Double spherical rubber expansion joints are widely used in pipeline systems such as water supply, HVAC, chemical, petroleum, natural gas, etc., especially in situations where temperature changes and vibrations need to be absorbed.

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    1.Professional manufactory.
    2.Trial orders are acceptable.
    3.Flexible and convenient logistic service.
    4.Competitive price.
    5.100% testing,ensuring the mechanical properties
    6.Professional testing.

    1.We can guarantee the best material according to related quotation.
    2.Testing is performed on each fitting before delivery.
    3.All packages are adapt for shipment .
    4. Material chemical composition is conformed with international standard and environment standard.

    A) How can I get more details about your products?
    You can send an email to our email address. We will provide catalogue and pictures of our products for your reference.We can also supply pipe fittings, bolt and nut, gaskets etc. We aim to be your piping system solution provider. 

    B) How can I get some samples?   
    If you need, we will offer you samples for free, but new customers are expected to pay express charge. 

    C) Do you provide customized parts? 
    Yes, you can give us drawings and we will manufacture accordingly. 

    D) To which country have you supplied your products?
    We have supplied to Thailand, China Taiwan, Vietnam, India, South Africa, Sudan, Peru , Brazil, Trinidad and Tobago, Kuwait, Qatar, Sri Lanka, Pakistan, Romania, France, Spain, Germany, Belgium, Ukraine etc. (Figures here only include our customers in latest 5 years.). 

    E) I can’t see the goods or touch the goods, how can I deal with the risk involved?  
    Our quality management system conforms to the requirement of ISO 9001:2015 verified by DNV. We are absolutely worth your trust. We can accept trial order to enhance mutual trust.

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