Wholesale Metal Steel Flange Flex Expans Connector Rubber Expansion Joint
Rubber expansion joint (also called rubber bellows or rubber joint) is a single sphere flexible connection consisting of two flanges and one rubber sphere body. The flanges provide secure connection points while the flexible rubber sphere absorbs axial, horizontal, and angular displacement.
- Working pressure: 6-40 bars
- Working temperature: -15°C to +80°C
- Nominal size range: DN15 to DN4000
- Rubber materials: Natural rubber, EPDM, Neoprene, NBR, PTFE
- Flange materials: Carbon steel (galvanized/painted), cast iron (painted), stainless steel
| Nominal diameter (mm/in) | Length (mm) | Axial displacement (mm) | Horizontal movement (mm) | Deflection angle | Special length (mm) |
|---|---|---|---|---|---|
| 32 / 1 1/4 | 95 | 9 | 6 | 15° | 130/150/200 |
| 40 / 1 1/2 | 95 | 10 | 6 | 15° | 130/150/200 |
| 50 / 2 | 105 | 10 | 7 | 15° | 130/150/200 |
| 65 / 2 1/2 | 115 | 13 | 7 | 15° | 130/150/200 |
| 80 / 3 | 135 | 15 | 8 | 15° | 130/150/200 |
| 100 / 4 | 150 | 19 | 10 | 15° | 130/200 |
| 125 / 5 | 165 | 19 | 12 | 15° | 130/150/200 |
| 150 / 6 | 180 | 20 | 12 | 15° | 130/150/200 |
| 200 / 8 | 210 | 25 | 16 | 15° | 130/150/200 |
| 250 / 10 | 230 | 25 | 16 | 15° | 130/150/200 |
| 300 / 12 | 245 | 25 | 16 | 15° | 130/150/200 |
| 350 / 14 | 255 | 25 | 16 | 15° | 130/150/200 |
| 400 / 16 | 255 | 25 | 16 | 15° | 130/150/200 |
| 450 / 18 | 255 | 25 | 16 | 15° | 200 |
| 500 / 20 | 255 | 25 | 16 | 15° | 200 |
| 600 / 24 | 260 | 25 | 16 | 15° | 300 |
| 700 / 28 | 260 | 25 | 16 | 15° | 300 |
| 800 / 32 | 260 | 25 | 16 | 15° | 300 |
| 900 / 36 | 260 | 25 | 16 | 15° | 300 |
| 1000 / 40 | 260 | 26 | 18 | 15° | 300 |
| 1200 / 48 | 260 | 26 | 18 | 15° | 300 |
Custom sizes available from DN15 to DN4000.
- Standard packaging: Plastic film wrapping with carton, pallet, or wooden case protection
- Custom packaging options available upon request
- International express services (DHL, UPS, TNT, EMS)
- Custom transportation solutions based on schedule and budget
- Option to use customer's preferred cargo agent
Yes, carbon steel flanges without anticorrosive paint are galvanized to prevent rust. We offer both electronic and hot dip galvanizing, with most customers preferring hot dip galvanizing.
Yes, we can customize the rubber joint with different materials for inner and outer layers based on your specific environmental requirements.
Yes, sphere-only purchases are available at reduced cost. Small diameter joints are typically in stock, while large diameter joints require custom ordering.
We offer a 12-month warranty from the date of receipt, including free replacement for any product issues during this period.
Yes, all products undergo hydro testing and include a qualified inspection report before leaving our facility.
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Have questions about our products or want to discuss a custom order? Our team is ready to help you.