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The Beaver Single-Arch Moulded Rubber Expansion Joint has a spherical design that gives it four-way movement. It allows for axial compression and extension, lateral deflection, angular and torsional movement.

Aside from absorbing directional movement, this expansion joint also dampens noise and vibration caused by mechanical equipment. It can be used to correct minor pipe misalignments during installation and relieve pipe stress caused by thermal expansion or mechanical movements.

This rubber expansion joint is suited to transporting fluids, slurries, or gases. Steel reinforcement embedded in grooved rubber ends provides strength under pressure or vacuum. Spherical design distributes internal pressure in all directions, reduces turbulence, and prevents sediment build-up.

Choose from a range of inner tube and outer lining materials to suit your media and site conditions.

Technical specifications




E11 (PN10)
E12 (PN16)
E13 (PN25 only for >DN 300 with limit rods)

Size range

DN25–1200 (1–48”)

Flange drilling

DIN PN10, PN16, others flange drilling as BS EN1092, PN16
AS2129 Table D, E
ANSI150 and JIS10K available on request

Material specifications



Reinforcing fabric


Tube and temperature range

EPDM (-45°C to +129°C)
Contact us for the following materials:
Hypalon (-62°C to +82°C)
Neoprene (-53°C to +68°C)
NBR (-53°C to +79°C)
Viton (-45°C to +179°C)
PTFE and EPDM (-53°C to +148°C)

Retain ring



Carbon steel

How we help you select your SPI package:

1. Tell us what you need

Tell us about your project. What items are on your MTO list, and what options do you need to weigh up?

2. Choose the right solution

Weigh up the options. We'll do the analysis, discuss the options with you, and recommend the right products—the choices we'd make in your shoes.

3. Get the job done

You get the complete package delivered to site as ordered. The right price, reliable delivery, and everything to spec. No surprises.

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Got questions? Need advice? Tap into our experience and get specialist advice from our friendly team.

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