RUBBER EXPANSION JOINT SUPPLIERS
Rubber Expansion Joint supplier in Perth, Western Australia supplying nationally across Australia with free delivery*. We supply a large range of rubber expansion joints to all cities in Australia, Perth, Adelaide, Melbourne, Sydney, Brisbane, Darwin, Canberra and Hobart.
We are a professional supplier and distributor of Rubber Expansion Joint products in Australia. Contact DEWATER PRODUCTS the rubber expansion joint suppliers on 1300 271 290.
A huge range of different models of rubber expansion joints available from us. Available in size 25mm to 3500mm.
Australia’s Leading Suppliers of Rubber Expansion Joints from Perth
Facts about Rubber Expansion Joints:
- Purposely built to safely expand and contract and absorb movement.
- Commonly used in piping systems, ships, bridges, buildings.
- Made from multiple layers of flexible rubber, with heat and corrosion resistant properties.
- The shape of the convolution is designed to withstand working pressure from the inside.
- Also known as a compensator and a flexible pump connector.
- Sphere types are made by a mould and vulcanising, they have floating flanges which can be rotated.
- Arch types ( spool types ) are made by hand or an automated process where many layers of rubber sheet are wrapped around a mandrel. Finally covered with Nylon peel ply to bind all of the layers together. They have split backing rings for securing the flange connections.
General information on Rubber Expansion Joints:
- Rubber Expansion Joints can be protected from erosion by installing an internal liner, such as a PTFE liner. Movements will be reduced when an internal liner is installed because they are a stiffer material compared to rubber, therefore not designed to flex.
- To protect the rubber expansion joint from failure due to excessive movement, limit rods should be installed. Also known as control rods. The rods are bolted to the outer flanges on each side of the rubber expansion joint using a special plate and nuts. The nuts should be set along the rods at a specific point, to limit the movement of the rubber expansion joint. The nuts basically act as a stopping point for the flanges, so the rubber doesn't get stretched or compressed too much.
- The joint is used for connecting a pump to a pipeline, as the pump will be vibrating against a fixed pipe system, the rubber expansion joint will allow for axial compression and extension, lateral offset and angular deflection.
- There are two types of rubber bellows designs being spheres or spools. Sphere expansion joints are the most commonly used due to their economical cost. Spools are the more robust design with a higher cost compared with sphere joints.
The purpose of Rubber Expansion Joints:
- Rubber Expansion Joints, also known as expansion bellows, are used in pipelines to allow flexibility, expansion and vibration between steel pipework and a pump. Any mechanical device will move and vibrate, and can cause stresses along a pipeline, that’s where our rubber bellows come in.
- Our parts can also have tie bars installed between the flanges for added strength and support when axial movement may be present in the pipeline. This will ensure the rubber will remain intact and not break by limiting the movement.
- Multiple configurations available - with both Sphere and Spool type rubber expansions they can be in the configuration of Single Arch, Double Arch and Triple Arch.
- These arches can be filled or unfilled.
- The filled type is ideally suited to Slurry and Sludge application so that the straight bore inside of the rubber expansion bore will remain clean and unclogged. The filled arch should also be used on suction pipes as they have excellent vacuum properties with a high negative pressure rating compared to other unfilled models, as the arch is filled and very strong in the middle of the spool section.
- The unfilled arch style allows great axial, lateral and angular deflection compared with the filled type, however dirt, sludge and slurry media can get caught in the gap especially at the bottom due to gravity if installed on a horizontal pipe system.
- Expansion bellows can also come with control units, or tie bars as they are otherwise known, these are recommended to be installed on a rubber expansion joint if there is going to be more movement in the joint than it could cope with if it didn’t have the control units fitted.
- Materials of the rubber expansion joint and bellows can come in many types, different rubbers have different properties so EPDM is great for water based media, NBR is great for oil based and gas based medial, Viton is great for chemical based media and higher temperatures.
Below is a table to provide a quick overview of our rubber expansion joint product range:
|Model||Size range||Pressure rating range||Vacuum rating range||Maximum movement range||Rubber Material options|
|FSF - single sphere||DN25 (1") to DN600 (24")||1600kPa to 860 kPa||600 to 600 mm H.g||25mm to 8mm||EPDM, Neoprene, Buna-N, Hypalon, Viton, Natural Rubber, Nitrile, Chlorobutyl, Silicone|
|FSF-B - single sphere||DN25 (1") to DN300 (12")||1600kPa to 1550kPa||600 to 600 mm H.g||13mm to 9mm||as above|
|FTF - twin sphere||DN25 (1") to DN750 (30")||1600kPa to 689 kPa||600 to 600mm H.g||53mm to 27mm||as above|
|Single Arch - unfilled||DN25 (1") to DN3500||2000kPa to 400kPa||730 to 700mm H.g||60mm to 12mm||as above|
|Double Arch - unfilled||DN50 (2") to DN1000||1600kPa to 1500kPa||700 to 700mm H.g||120mm to 20mm||as above|
|Triple Arch - unfilled||DN50 (2") to DN3000||1400kPa to 600 kPa||660 to 660mm H.g||180mm to 30mm||as above|
|Quadruple Arch - unfilled||DN50 (2") to DN1500||1000kPa to 500kPa||660 to 660mm H.g||100mm to 40mm||as above|
|Concentric reducing||DN25 (1") to DN600 (24")||1400kPa to 800kPa||660 to 660mm H.g||41mm to 13mm||as above|
|Eccentric reducing||DN25 (1") to DN600 (24")||1400kPa to 800kPa||660 to 600mm H.g||41mm to 13mm||as above|
|Single Arch - filled||DN25 (1") to DN3500||2000kPa to 400kPa||750 to 700mm H.g||30mm to 6mm||as above|
|Double Arch - filled||DN50 (2") to DN1000||1600kPa to 1500kPa||750 to 700mm H.g||60mm to 10mm||as above|
|Triple Arch - filled||DN50 (2") to DN3000||1400kPa to 600kPa||750 to 660mm H.g||90mm to 15mm||as above|
|Quadruple Arch - filled||DN50 (2") to DN1500||1000kPa to 500kPa||750 to 660mm H.g||50mm to 20mm||as above|
|PTFE lined FSF||DN32 to DN600(24")||2500kPa to 1000 kPa||750 to 600mm H.g||26mm to 6mm||as above|
How to install a Rubber Expansion Joint:
- Ensure the piping has adequate anchoring points.
- Good pipe guiding.
- Good supports.
- Ensure the anchors wont fail in service. Check the thrust loads.
- Ensure there is corrosion protection.
- Ensure the system doesn't over pressurize.
- Ensure there is erosion protection.
- Ensure the correct model of rubber expansion joint is installed for the purpose. Check the anticipated operating conditions.
- Ensure the rubber expansion joint is installed in the correct location. Rubber expansion joints should be installed near to anchor points and inbetween anchor points.
- Check the rubber expansion joint before installing. Any cracks or damage will get worse under pressure.
- Check the pipe alignment before installing a rubber expansion joint.
- Check the mating flanges on the ends of the pipes, ensuring the flange faces are clean, smooth with no sharp edges.
- Use a suitable lubricant and lubricate the mating faces.
- Line up the expansion joint with the gap inbetween where it will be installed and put into position. Now using a couple of nuts and bolts, place through the bolt holes of the flanges each side, and loosely secure.
- Fit all remaining nuts and bolts and loosely secure.
- Now start tightening the nuts and bolts in the required sequence, around both flanges.
- Do not over tighten the nuts and bolts.
- Install limit rods/control rods if required.
- Dewater Products are Australia-based suppliers ready to deliver you any Rubber Expansion Joint with different flange classes.
- Material linings can be any rubber available on the market suitable for your application, and flanges can be any steel with galvanised or epoxy surface finish, or stainless steel.
- Rubber expansion joints fitted with 316 stainless steel flanges or backing rings are our speciality.
Shipping Expansion Joints Across Perth, Darwin, Brisbane, Sydney, Melbourne & Adelaide
Need rubber expansion joints or bellows? Discover for yourself why businesses across Sydney, Brisbane, Adelaide and Melbourne trust us as their suppliers. Contact us on 1300 271 290 for more information.