Our Products
Rubber Expansion Joints
Rubber (non-metallic) expansion joints are flexible spool-type connectors that absorb axial, lateral, and angular movement while reducing vibration and noise. Built with elastomer compounds and fabric/metal reinforcement, they protect pumps, turbines, and piping by accommodating misalignment and thermal growth. Manufactured by Athulya Bellows in line with proven industry practices.
Key Features
• Excellent vibration isolation and acoustic damping at equipment nozzles.
• Handles axial, lateral, and angular movements; compensates minor misalignment.
• Available in single-arch / multiple-arch profiles for higher movement capability.
• Integral rubber flanges with CS/SS backing flanges; drilling to client standard.
• Compound options for water, steam, oil, chemicals; abrasion-resistant liners available.
• Optional control units (tie/limit rods) and vacuum support rings.
Applications
• Pump and compressor suction/discharge lines; HVAC & district energy mains.
• Refineries, petrochemical & chemical plants—general service and utility lines.
• Power, steel & cement plants—cooling water, air, gas, and slurry services.
• Where anchor loads must be minimized and equipment protected from vibration.
Technical Data
| Parameter | Value / Range | Notes |
|---|---|---|
| Nominal Size | Project-specific | Engineered per application |
| Pressure Class | As per design/service | Control units recommended at higher pressure |
| Temperature | Compound-dependent | Elastomer & liner selected per medium & temp |
| Movement Capability | Axial / Lateral / Angular | Movement per arch count & face-to-face length |
| Materials (Elastomer) | EPDM / Nitrile (NBR) / Neoprene (CR) / Butyl / CSM / Natural Rubber | Chosen for chemical/temperature compatibility |
| Reinforcement | Fabric cord & steel wire rings | Vacuum support rings when required |
| End Connections | Integral rubber flanges + CS/SS backing flanges | Drilling to ANSI/EN/IS or client standard |
| Accessories | Control units, vacuum rings, PTFE liners, external covers | Shipping bars removed at installation |
Design Options
• Single-arch / multiple-arch profiles for higher movement.
• PTFE sleeve/lining for aggressive media; abrasion-resistant inner tube.
• Control units (tie/limit rods) with clevis/spherical ends.
• Galvanized/painted CS or stainless backing flanges; external covers/insulation.
• Factory preset / marked cold-spring where specified.
Quality & Testing
• Hydrostatic / pneumatic pressure testing as specified for service.
• Optional NDT/leak checks and dimensional inspection.
• Material traceability and documentation on request.
Prefer a quick review? Email your specs to sales@athulyabellows.com.