Key Features
- High flexibility to absorb thermal expansion and contraction
- Excellent mechanical vibration dampening properties
- Compensates for axial, lateral, and angular misalignment
- Resistant to seawater, corrosive atmospheres, and many chemicals
- Available with DIN PN10 or PN16 flanged connections
- Reinforced with high-strength synthetic fabric for durability
- Simple bolt-on installation with no additional gaskets required
Technical Specifications
| Specification | Value |
|---|---|
| Nominal Diameter (DN) | DN 32 – DN 600 |
| Flange Standard | DIN PN10 / PN16 |
| Working Pressure | Up to 16 bar (depending on size and fluid) |
| Temperature Range | -20°C to +110°C (standard grade) |
| Bellow Material | EPDM / Neoprene (synthetic rubber) |
| Reinforcement | Multi-ply polyamide or aramid fabric |
| Flange Material | Carbon steel (galvanized or primer-coated) or stainless steel |
| Applications | Marine seawater cooling, exhaust, bilge, and general pipe systems |
Frequently Asked Questions
What fluids are these rubber bellow expansion joints suitable for?
These joints are suitable for seawater, fresh water, air, and dilute chemical solutions. They are not recommended for strong acids, petroleum-based fuels, or solvents unless explicitly stated for the selected elastomer grade.
Can these joints correct pipe misalignment?
Yes, rubber bellows are designed to compensate for moderate axial, lateral, and angular misalignment. However, excessive misalignment should be avoided to extend service life.
What is the maximum working pressure for these DIN flange expansion joints?
The working pressure depends on the nominal diameter and temperature. For standard DN50 parts, the maximum working pressure is 16 bar at 20°C. At higher temperatures, derating may apply.
Are these expansion joints suitable for exhaust systems?
Yes, with a high-temperature elastomer grade (such as Viton or PTFE-lined), they can handle elevated temperatures typical of marine exhaust systems. Standard EPDM is limited to 110°C.
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