Double Flange Limit Expansion Joint

1. Expansion compensation: During thermal expansion, contraction, or settlement, the expansion tube slides inside the body to absorb axial displacement (commonly 50–300mm).

2. Dynamic sealing: The sealing ring slides with the telescopic tube, always adhering to the tube wall; the higher the pressure, the tighter the seal.

3. Limit protection: bolts loosen during normal expansion and retraction; When the preset limit is reached, the double nuts seize the flange, preventing further displacement and protecting pumps, valves, and other equipment.

Application Scenarios

1. Municipal water supply and drainage: long-distance straight pipe sections to compensate for thermal expansion and contraction.

2. Heating/Heating: Compensation for axial displacement of hot water pipelines.

3 Pump room/pump station: pump inlet and outlet, vibration damping, convenient maintenance.

4. Buildings and settlement joints: absorb uneven settlement displacement of the foundation.

5. Chemical/Industrial Pipelines: Conveying hot and cold media, buffering vibrations and pressure fluctuations.

Key Installation Points

1. Both end flanges are coaxial with the pipeline to avoid uneven loading.

2. Evenly tighten the gland bolts diagonally, ensuring moderate sealing and flexible expansion and contraction.

3. Preset the limit nut to the design expansion limit, leaving a gap during normal operation.

4. Fixed brackets cannot be replaced; thrust supports must be separately installed at the pump outlet.

Technical Specifications