Flanged Rubber Expansion Joints
A flanged rubber expansion joint is a flexible pipe connector that absorbs vibration, noise transmission and small movements with its fabric and steel-wire reinforced rubber bellows between floating flanges.
It is used at pump, chiller, AHU and boiler connections. The product range includes PN16 models from DN32 to DN300 with EPDM bellows and NBR bellows for oily fluids.
Main Applications
- Pump suction and discharge flanges
- Chiller and AHU connections
- Boiler and heat exchanger outlets
- Cooling tower lines
- Booster set headers
- Oil-bearing fluid lines (NBR)
Technical Data
| Type | Floating flange rubber expansion joint |
|---|---|
| Sizes | DN32 – DN300 (product range) |
| Pressure | 16 bar (DN32–DN300) |
| Pressure-temperature | 50 °C: 12.4 · 60 °C: 10 · 70 °C: 7.5 · 80 °C: 6.5 · 90 °C: 4 bar |
| Operating temperature | −10 … +90 °C |
| Bellows | EPDM; NBR for oily fluids (product range) |
| Reinforcement | Nylon fabric and hard steel wire |
| Length | 100 mm (DN32–100) · 120 mm (DN125–300) |
| Movement (DN32–100) | Axial ±10 mm · lateral ±10 mm · angular ±10° |
| Movement (DN125–300) | Axial ±12 mm · lateral ±12 mm · angular ±12° |
Material Options
| Part | EPDM bellows | NBR bellows |
|---|---|---|
| Bellows | EPDM | NBR |
| Suitable fluid | Water, glycol water, air | Oil-bearing fluids |
| Flange | Mild steel floating flange | Mild steel floating flange |
| Reinforcement | Nylon fabric + steel wire | Nylon fabric + steel wire |
Which material? Pressure falls as temperature rises, down to 4 bar at 90 °C. Values come from the rubber expansion joint manufacturer sheet; metal bellows solutions should be used on lines above 90 °C.
Advantages
Vibration and Noise Isolation
- On pump and chiller lines
Floating Flange
- Easy bolt-hole alignment
NBR Option
- Oily fluids
Wide Size Range
- From DN32 to DN300
Construction and Design Features
- Rubber bellows
- Nylon fabric and steel wire reinforcement
- Floating steel flanges
- Short installed length
Send the size, fluid, temperature and working pressure; we will confirm a suitable flanged rubber expansion joint from stock.
How to Choose?
- Size and flangeDetermine DN and flange standard.
- Pressure-temperatureCheck allowable pressure at operating temperature.
- FluidChoose EPDM for water and NBR for oily fluids.
- AnchoringPlan fixed supports on both sides of the joint.
Complementary Products
Why ORFA?
Other Rubber Expansion Joints
Threaded Rubber Expansion Joints
Threaded rubber expansion joints have threaded unions and absorb pump and equipment vibration in small diameter installations.
Details →
Marine Type Rubber Expansion Joints
Marine type rubber expansion joints are long-body rubber bellows used to absorb vibration in ship and marine applications.
Details →Get a quote for your project
Our sales team will prepare the best solution for your needs.