IPBU in-line pressure balanced expansion joint will absorb thermal expansion while eliminating the pressure thrust loads on a piping system without a change in direction of the piping.

The unique design of the IPBU consists of a constant volume device which is created by the addition of two balancing bellows in which the cross-sectional area is exactly twice the cross-sectional area of the line bellows.

By proper cross-linking, the change in volume of the line bellows, due to a change (i.e. compression and/or extention) can be made to cause an equal but opposite change in volume of the balancing bellows.

Therefore since the volume changes are of an equal value, the pressure forces that are normally present in a piping system containing bellows expansion joints are eliminated.

• Eliminates pressure thrust

• Conserves space

• Eliminates main anchors

• Direction changes in piping system not required

• Combined spring rate forces only