Series CF Controlled Flexing Expansion Joints combine high-corrugation free flexing bellows with mated neck rings, and equalizing or control rings.
This heavy-duty construction allows their use with higher pressures and larger axial movements than a standard high-corr unit would be able to accommodate. Each of the equalizing rings that fit into the corrugations are extended in a “T” shape over the bellows.
The tops of these rings will begin to make contact when the bellows are compressed, spreading the movement equally over each convolution. Bellows squirm and buckling is controlled. Controlled flexing expansion joints are ideal for steam piping to compensate for thermal growth. Selections include either 150# or 300# bellows, and in single or dual configuration. End fittings can be plate flange, forged flange, or weld ends. Controlled-flexing joints are rated for full-vacuum, and temperatures from -20 to 800°F. Meets MIL-E-17813F Type II Class 1 or 2.