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Fully Sealed Rubber Expansion Joint

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Company news about Under what circumstances is a limiting rod device required for rubber joints?

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Under what circumstances is a limiting rod device required for rubber joints?

2025-10-11

Rubber joint is typically composed of an inner rubber layer, a fabric reinforcement layer (the reinforcement layer comprises multiple layers of scraped rubber nylon cord fabric), a middle rubber layer, an outer rubber layer, and end reinforcement metal rings or wire rings. After being vulcanized at high temperature and high pressure, it is then assembled with a metal flange or parallel joint loose sleeve.

 

A rubber joint limiter protects the rubber joint from the risk of pull-out, controlling the joint's displacement within a certain range, thereby ensuring the stable operation of the joint and the pipe.
Anti-pull-out limiters are an additional limiter added to the existing product's performance. The pipe can expand and contract freely within the allowable range, but will be restrained if the maximum expansion is exceeded, ensuring safe operation. They are particularly suitable for connections in pipelines subject to vibration, gradients, and bends.

 

 

 

Installation Requirements for Limit Devices:

 

1. If the pipe diameter is larger than DN200, a limit device must be installed. This is because the larger the pipe diameter, the more pronounced the sphere's elasticity becomes. Installing such a device improves the operational stability of large-diameter rubber joints.

2. When installing rubber joints at height, and also for large-diameter pipes, a limit device must be installed. This is because suspended rubber joints cannot be relieved by supports. Only a limit device can improve the operational stability of the rubber joint.

3. When installing rubber joints at pipe bends, a limit device is also required. This is because the inertia of the pipe can cause strong impacts at the bend and significantly affect the product. Installing supports and brackets, along with the product's built-in limit device, ensures safe operation at the bend.

 

 

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Home > News >

Company news about-Under what circumstances is a limiting rod device required for rubber joints?

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News

Cases

Under what circumstances is a limiting rod device required for rubber joints?

2025-10-11

Rubber joint is typically composed of an inner rubber layer, a fabric reinforcement layer (the reinforcement layer comprises multiple layers of scraped rubber nylon cord fabric), a middle rubber layer, an outer rubber layer, and end reinforcement metal rings or wire rings. After being vulcanized at high temperature and high pressure, it is then assembled with a metal flange or parallel joint loose sleeve.

 

A rubber joint limiter protects the rubber joint from the risk of pull-out, controlling the joint's displacement within a certain range, thereby ensuring the stable operation of the joint and the pipe.
Anti-pull-out limiters are an additional limiter added to the existing product's performance. The pipe can expand and contract freely within the allowable range, but will be restrained if the maximum expansion is exceeded, ensuring safe operation. They are particularly suitable for connections in pipelines subject to vibration, gradients, and bends.

 

 

 

Installation Requirements for Limit Devices:

 

1. If the pipe diameter is larger than DN200, a limit device must be installed. This is because the larger the pipe diameter, the more pronounced the sphere's elasticity becomes. Installing such a device improves the operational stability of large-diameter rubber joints.

2. When installing rubber joints at height, and also for large-diameter pipes, a limit device must be installed. This is because suspended rubber joints cannot be relieved by supports. Only a limit device can improve the operational stability of the rubber joint.

3. When installing rubber joints at pipe bends, a limit device is also required. This is because the inertia of the pipe can cause strong impacts at the bend and significantly affect the product. Installing supports and brackets, along with the product's built-in limit device, ensures safe operation at the bend.

 

 

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