Expansion Joint Butterfly Valve Description
Expansion Joint Butterfly Valve is a specialized valve integrating a butterfly valve with a pipeline expansion joint, designed to address displacement compensation issues caused by thermal expansion, vibration, or installation errors in piping systems. Below is a detailed breakdown of its core applications and technical features:
Core Applications
1. Thermal Displacement Compensation
Scenario: Steam pipelines (>200°C), high-temperature fluid lines
Function: Absorbs linear axial expansion due to heating, preventing flange deformation and leakage.
Typical Cases: Power plant steam systems, refinery hot oil pipelines.
2. Installation Error Compensation
Scenario: Long-distance pipelines, constrained installation conditions
Function: Accommodates ±10–50mm axial misalignment (varies by design), reducing flange alignment precision requirements.
Example: Municipal water pipelines crossing expansion joints, industrial equipment connections.
3. Vibration & Settlement Compensation
Scenario: Pump/compressor outlets, vibration-prone zones, seismic areas
Function: Mitigates pipe displacement from equipment vibration or ground settlement, protecting valve sealing.
Industry Use: Ship power systems, chemical plant pump lines.
Structural Advantages
| Component | Functional Design |
|---|---|
| Valve Expansion | Corrugated pipe or rubber sleeve structure, withstands pressure while allowing axial movement |
| Flange Connection | Loose-tie flanges (floating type) enable sliding compensation against pipe flanges |
| Sealing System | Inner PTFE sealing ring + outer rubber dust cover for dual-layer leak prevention |
| Limit Rod | Installed to lock expansion during setup, removed post-operation to prevent over-compensation damage |
Expansion Joint Butterfly Valve Specification
Design Specification
Design Standards: API 609, GB/T 12238, JB/T 8527
Structure Length: API 609, GB/T 12221, ASME B16.10
Connection Standard: ASME B16.5, ASME B16.47, GB/T 9113.1
Pressure Test: API 598, GB/T 13927, JB/T 9092
Pressure & Temperature Rating: ASME B16.34, GB/T 12224
Performance Parameters
Body Material: Carbon steel, stainless steel, alloy steel
Nominal Diameter: NPS 2″ – NPS 32″ / DN50 – DN800
Pressure Range: CL150 / PN10 – PN16
Operating Temperature: ≤425°C
Scope of Application: Pipelines carrying water, food, pharmaceuticals, power, oil, liquefied gas, steam, and more
Expansion Joint Butterfly Valve for sale
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