On the rubber soft joint and installation precautions

The rubber bulge can be squeezed, if screws are thightened to rigid or when installing expansion joints with threaded holes.
Torsion must be avoid at any time.
Rubber expansion joints must be protected against heath an4 sparkes from welding works in the direct surroun­ dings.
Rubber expansion joints are flexible elements and are not capable of taking the static load of the conduit pipes and the pressure valves of the medium.
The bellow may not be painted or coveted.
sound and vibration absorbing expansion joints and in case there are no mouvements, the optimum of its operation range lays between its over –all length of its maximum compression length.
nspection after instruction.
An installed expansion joint must be within each and may not be insul.
Vieuw checks are needed twice a year.
The installation length may not be bigger than the overall—length.
A build out expansion joint can have damaged and deformed packing faces so they donot seal perfect any more， and may not be installed again.