Series "IPBE" Externally Pressurized Inline Pressure Balanced Expansion Joint Thorburn's IPBE expansion joint is an in-line, externally pressurized pressure balanced expansion joint. This type of expansion joint is capable of long axial movements at high pressures and at the same time eliminates pressure thrust forces on the system. Main anchors are no longer required. In
order to accomplish this balancing, a constant volume device is
used by the addition of a balancing bellows with a cross-sectional
area equal to twice the cross-sectional area of the line or pipe
size bellows. Through proper cross-linking, the change in volume
of the line bellows, due to an axial change in length, i.e. expansion
or contraction, can be made to cause an equal but opposite change
in volume of the balancing bellows. Therefore, if a contraction
of the pipe occurs, an equal expansion can be made to occur in the
balancing bellows. Using the principles of mechanics and hydraulics,
if no volume change occurs, then all pressure forces remain constant
and there are no forces out of balance. Thus the pressure thrust
that would normally be present in a piping system containing an
expansion joint is eliminated.
|
|
Absorbs large axial movement - up to 400mm
piping system
