Square bellows compensators are flexible connection devices used in pipeline systems, mainly for absorbing displacement and deformation caused by thermal expansion and contraction, vibration or foundation settlement.
1. Characteristics
Features
Multi-directional compensation: It can absorb axial, lateral and angular displacements.
Compact design: The square structure is suitable for installation environments with limited space.
High pressure/high temperature resistance: Depending on the material (such as 304/316 stainless steel), it can adapt to different working conditions.
2. Main functions
Thermal displacement compensation: Alleviates the thermal stress in pipelines caused by temperature changes.
Vibration and noise reduction: Reduce fluid pulsation or the transmission of equipment vibration.
Misalignment compensation: Adapt to pipeline installation deviations or foundation settlement.
3. Application scenarios
Thermal pipelines: Steam/hot water pipelines in power plants and heating systems.
Industrial pipelines: High-temperature and high-pressure pipelines for the petrochemical, chemical, and metallurgical industries.
Air conditioning and ventilation systems: HVAC systems for large buildings, reducing vibration transmission.
4. Key points for selection
Displacement: Calculate the required compensation amount (axial and lateral) based on the thermal expansion of the pipeline.
Pressure/Temperature: Select the material and pressure rating that match the working conditions.
Installation space: The square design is more suitable for narrow or non-linear pipe arrangements.
Medium characteristics: Corrosion-resistant materials (such as 316L stainless steel) should be selected for corrosive media.
5. Installation precautions
Pre-stretching/compression: Adjust the length of the bellows in advance according to the design value (when installed in a cold state).
Guide supports: Guide supports should be set up nearby to prevent excessive lateral displacement of the pipeline.
Strictly prohibit twisting: Avoid torsional stress during installation.
Anti-corrosion protection: Enhanced protection of the outer surface is required in outdoor or humid environments.
6. Common Faults and Maintenance
Leakage: Check whether the corrugated pipe is corroded or fatigued cracked.
Instability: Excessive compression or lateral displacement may cause swelling deformation.
Maintenance: Regularly inspect the condition of the bellows, whether the flow guide cylinder has fallen off, and whether the fasteners are loose.