Rubber Expansion Joints


Rubber joints consist of a rubber bellows element fitted usually with fixed or floating (swivel) flanges, or pipe unions to facilitate quick installation into a piping system.

The rubber bellows can be supplied in a wide range of rubber synthetic compounds including EPDM, neoprene, nitrile, butyl, Hypalon and Viton, generally reinforced with a fabric or wire insert. The flanges can be supplied in zinc plated steel, hot dip galvanised steel or stainless steel.

The RADCOFLEX range covers from the moulded spherical style to complex hand-built wide arch styles with integral flanges.

RADCOFLEX rubber expansion joints are in accordance with the guidelines of the Fluid Sealing Association (FSA) Non-metallic Pressure Piping Expansion Joints.

FSF - Single Sphere


A flexible joint made of heat resisting synthetic elastomers and moulded in a spherical shape with vanstoned metal floating flanges.

Ideal for air conditioning and sanitary equipment, pumps, refrigerators, blowers, marine piping systems, feed water, drainage systems and such industries as chemical plants, shipbuilding, power generation, building and waste disposal plants.

Suitable for Axial, Lateral or Angular movements. Style FSF joints are not capable of absorbing more than one movement at a time (i.e. non-concurrent), nor absorbing torsional (i.e twisting) movement.


Nominal Bore
32 - 750mm

Material Types
Various Types Available

Positive Pressure
758 - 1600 kPa

Negative Pressure
600 mm H.g

FTF - Twin Sphere


A flexible joint made of heat resisting synthetic elastomers and moulded in a twin sphere shape with vanstoned metal floating flanges, pipe unions or threaded mating flanges.

Ideal for applications requiring large axial, lateral and angular movements. Industries include shipbuilding, power generation, chemical plants and buildings.

Style FTF joints are not capable of absorbing more than one movement at a time (i.e. non-concurrent), nor absorbing torsional (i.e twisting) movement.


Nominal Bore
32 - 750mm

Material Types
Various Types Available

Positive Pressure
758 - 1600 kPa

Negative Pressure
600 mm H.g

WA - Wide Arch - Integral Flange


A hand-built rubber expansion joint with a long flowing wide arch made of heat resisting synthetic elastomers with integral rubber one-piece bonded flanges providing maximum flange joint integrity. The elastomers used are pure rubber with no filler or recycled rubber. The integral flanges can be reinforced with split metal reinforcing/retaining rings.

These joints although they look similar to a narrow arch joint do have a wider arch, providing a joint with greater movement capability and lower spring rates than the narrow arch. They can be manufactured in one, two, three or four arches depending upon the amount of movement required.

The joints consist of a seamless inner tube of various elastomers depending upon the required service of the joint and what they are to convey water, sewage, chemicals, petroleum products, gases, etc. The joints have an outer cover of elastomer to protect the inner tube from damage or abuse. The joints are reinforced generally with a tough nylon fibre cord.


Nominal Bore
32 - 1000mm

Material Types
Various Types Available

Positive Pressure
410 - 1140 kPa

Negative Pressure
250 - 660 mm H.g

WA - Wide Arch - Embedded Flange


A hand-built rubber expansion joint with a long flowing wide arch made of heat resisting synthetic elastomers with fixed metal flanges embedded in the rubber during the vulcanisation process. The elastomers used are pure rubber with no filler or recycled rubber.

These joints although they look similar to a narrow arch joint do have a wider arch, providing a joint with greater movement capability and lower spring rates than the narrow arch. They can be manufactured in one, two, three or four arches depending upon the amount of movement required.

The joints consist of a seamless inner tube of various elastomers depending upon the required service of the joint and what they are to convey water, sewage, chemicals, petroleum products, gases, etc. The joints have an outer cover of elastomer to protect the inner tube from damage or abuse. The joints are reinforced generally with a tough nylon fibre cord.


Nominal Bore
32 - 1000mm

Material Types
Various Types Available

Positive Pressure
410 - 1140 kPa

Negative Pressure
250 - 660 mm H.g