External Pressure-Type Bellows Expansion Joint
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  • External Pressure-Type Bellows Expansion Joint

External Pressure-Type Bellows Expansion Joint

External‑pressure bellows expansion joints are specialized metal compensation devices designed for vacuum, negative‑pressure, and external‑pressure service conditions. By employing an outer‑cylinder guiding structure, they enhance the external‑pressure stability of the bellows, enabling them to accommodate substantial axial displacements under external pressure. This type of expansion joint is widely used in vacuum systems, negative‑pressure flue‑gas systems, and high‑displacement industrial piping. It effectively reduces thermal‑expansion stresses, prevents external‑pressure buckling of the bellows, and improves system operational stability under complex service conditions.

Category:

Compensator – Metal Flexible Connector

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sales@jxrubberhose.com

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+86-15631895830

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Product Overview

The external-pressure-type bellows compensator is a metal expansion joint specifically designed for vacuum, negative-pressure, and external-pressure service conditions. Its outer‑cylinder guiding structure enhances the bellows’ resistance to external pressure, enabling it to accommodate substantial axial displacement under external pressure.
This type of compensator is widely used in vacuum systems, negative-pressure flue-gas systems, and industrial pipelines subjected to large displacements. It effectively reduces thermal expansion stresses, prevents external‑pressure buckling of the bellows, and enhances system operational stability under complex service conditions.

Product Structure

External-pressure-type bellows expansion joints typically consist of the following components:
Metal bellows
Outer cylinder structure
Guidance device
Flange or welded nozzle
Flow guide tube (optional)
Reinforcement ring (optional)
The outer‑cylinder structure is designed to enhance the external pressure stability of bellows and to prevent buckling under external pressure, making it suitable for large‑displacement compensation in vacuum and negative‑pressure systems.

Product Applications

Chemical Vacuum Distillation System
Vacuum reaction vessel piping
Negative-pressure flue gas system
Power plant flue gas duct
Vacuum metallurgy system
High-Temperature Exhaust Gas Conveyance System
Industrial vacuum pipeline network
Pipeline Systems for the Chemical and Energy Industries

Keywords:

External Pressure-Type Bellows Expansion Joint

Email:

sales@jxrubberhose.com

Phone:

+86-15631895830

Hebei Jiuxing Rubber & Plastic Products Co., Ltd. specializes in the R&D and manufacturing of various high-pressure rubber hoses, special hoses, metal hoses, expansion joints, rubber seals, nylon products and pipeline fittings. Our products are widely applied in many industries including construction machinery, coal mining, oil fields, chemical industry, automobile, metallurgy and so on.

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