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Expansion Joints
Rubber Expansion Joints (Rubber Bellows)
Designed to reduce pipeline stress, absorb vibration, and compensate for thermal movement, rubber expansion joints are a critical part of many industrial and infrastructure piping systems.
Dewater Products supplies a full range of flexible rubber bellows in multiple designs. Whether you're dealing with pump misalignment, water hammer, or pipework expansion, we have a solution engineered to perform under pressure.
All products include free delivery to metro areas across Australia.
For technical advice, contact us at sales@dewaterproducts.com.au or call 1300 271 290.
Why Engineers Choose Dewater:
- ✔️ 15+ years of pipeline component expertise
- ✔️ Trusted across mining, marine, wastewater & industrial sectors
- ✔️ Sizes from DN25 to DN3500 — with custom flanges & materials
- ✔️ Optional PTFE linings, vacuum rings, and control rods
- ✔️ Free metro shipping + fast, expert support nationwide
Control Rod Set - Rubber Expansion Joint Accessory
Control rods / Tie rods for Rubber Expansion Joints
Technical Specifications
- Size Range: DN25 to DN3500
- Models: Single Sphere, Twin Sphere, Single/Double/Triple/Quad Arch (Filled or Unfilled), PTFE Lined, Reducers
- Materials: EPDM, Neoprene, NBR, Viton, Hypalon, Natural Rubber, PTFE
- Lining Options: Rubber or PTFE
- Flange Materials: Zinc Plated, Galvanised, 304/316 Stainless Steel, Epoxy-Coated Steel
- Pressure Ratings: Up to 25 BAR
- Vacuum Rating: Up to 750 mm Hg
- Applications: Industrial, HVAC, Marine, Chemicals, Slurry, Pumps, Mining, Dredging
- Free Delivery: Perth, Sydney, Melbourne, Brisbane, Adelaide, Canberra, Darwin, Hobart
Installation Guidelines
Before Installation:
- Ensure piping is well anchored and supported
- Use proper pipe guiding to avoid stress on the joint
- Inspect the joint for cracks or damage before installation
- Confirm pressure and temperature limits are not exceeded
- Clean and smooth flange faces are required
Step-by-Step Procedure:
- Apply lubricant to flange faces
- Align joint between flanges and insert bolts loosely
- Tighten bolts in a criss-cross sequence
- Do not over-tighten – follow torque specs
- Install control rods if needed
Additional Notes
- Flange standards: Table D, Table E, ANSI, DIN, BS, JIS
- Food-grade and WRAS-approved EPDM available for potable water
- Control rods recommended for unpredictable movement or high pressure
- Vacuum rings recommended when negative pressure exceeds 600mm H.g
- Custom designs and large diameter options available on request
Model Comparison Table
| Model | Fill Type | Size Range | Pressure Range | Common Materials |
|---|---|---|---|---|
| FSF - Single Sphere | Sphere | DN32 – DN600 | 7.5 – 16 BAR | EPDM / 316SS or Zinc |
| FSF-B - Single Sphere (Euro Spec) | Sphere | DN40 – DN300 | Up to 16 BAR | EPDM / Zinc |
| FTF - Twin Sphere | Sphere | DN32 – DN750 | Up to 16 BAR | EPDM / Zinc |
| Single Arch | Filled & Unfilled | DN50 – DN3500 | Up to 16 BAR | EPDM / Zinc |
| Double Arch | Filled & Unfilled | DN50 – DN1000 | Up to 16 BAR | EPDM / Zinc |
| Triple Arch | Filled & Unfilled | DN50 – DN3000 | Up to 16 BAR | EPDM / Zinc |
| Quad Arch | Filled & Unfilled | DN50 – DN1500 | Up to 16 BAR | EPDM / Zinc |
| Concentric / Eccentric Reducers | Filled & Unfilled | DN50 – DN600 | Up to 16 BAR | EPDM / Zinc |
| PTFE Lined FSF | Sphere | DN32 – DN600 | Up to 16 BAR | EPDM + PTFE / Zinc |