High pressure rubber bellows expansion joint
NBR flexible rubber joint is designed for pipe systems to absorb pipe movements, relieving stress, reducing system noise/vibration, compensate for misalignment/offset and to protect rotating mechanical equipment against start-up surge forces. The molded single sphere and twin sphere designed bellows are inherently stronger than the conventional hand-built style spool arch type. Internal pressure within a “sphere” is exerted in all directions, distributing forces evenly over a larger area. The spherical design “flowing arch” reduces turbulence and sediment buildup.
Installation of rubber joint
1.Make sure that the sealing faces of the joint bear against mating flanges that are flat and clean over the whole width of the joint.
2.Do not use raised face flanges.
3.Insert flange bolts with the bolt heads facing the rubber body and nuts on the pipe side.
4.Tighten the bolts crosswise, taking up the tension gradually until all the nuts are evenly, tightened.
5.Check that the tightness allows no leakages after the joint has been brought up to pressure.
