Spherical Expansion Joints

Spherical Expansion Joints

Molded Rubber Expansion Joints

Spherical molded rubber expansion joints are entirely different. There is no wire reinforcement in the body, and the pressure is retained by the tire cord spanning across the body from anchors in each flange. They are very similar to truck tires without the tread.

Spherical expansion joints are built straight. The curing process takes place in a steel mold clamped shut in a hydraulic press. Heat is introduced from plates on either side of the mold rather than by steam. An air bag is introduced in the center and pressurized to expand the body against the contours of the steel mold where it is vulcanized.

Series SFDCR – 6 x 5

CUSTOM JOINTS

At Mercer Rubber Co., we go beyond the ordinary. If our extensive range of Spherical Expansion Joints doesn't match your precise requirements. Our team specializes in crafting custom-designed expansion joints that perfectly fit your unique needs. 

Distinguishing Masonflex and Safeflex

Choosing the Right Expansion Joint

We manufacture these expansion joints using Nylon, Polyester or DuPont™ Kevlar® tire core. Our exclusive solid flange ring is clamped in place by the steel backup flanges. The built-in ring prevents the rubber end pulling out of the retention flange.

We manufacture this series in single and double spheres, as well as concentric reducers. In the sizes through 2″ (50mm) they are built with screw on flanges.

Since these connectors are molded, there is a limitation on size, and face to face dimensions are fixed. The sealing principle is so effective, however, that we have hand-built this construction to very large diameters, as shown in the photograph below.

Molded expansion joints are kept in stock in Neoprene and EPDM. They can be furnished in Nitrile, Hypalon® or other materials as well.

Our expert team at Mercer Rubber is eager to collaborate and engineer custom solutions that meet your specific needs. Let’s turn your vision into reality – Contact us now!