Abstract: A cleaning bell (1) for removing scraps from tubular pipes for the transport or distribution of fluids, comprises a bell-shaped body (2) having a head end (5) provided with a through passage (6) for slidable insertion of an operating rod (7) carrying cleaning accessories (10); advantageously, said cleaning bell (1) comprises a pneumatic cylinder (12) fixed to said head end (5) and adapted to be attached to said operating rod (7) to oppose the force of ejection of said operating rod (7) from the bell-shaped body (2) caused by an internal overpressure.

Abstract: A shutter (1) with automatically expanding sealing ring is described, adapted to close a duct (1?) and mobile along a vertical axis perpendicular to the longitudinal axis of the duct (1?), comprising: an abutment block (1A) adapted to support the pressure inside the duct (1?); and a head (IB) adapted to make the seal to the pressure inside the duct (1?), the head (IB) assuming a rest position outside the duct (1?) wherein it is coaxial with the abutment block (1A) along the vertical axis, and an operating sealing position inside the duct (1?) along the longitudinal axis of the duct (1?). The head (IB) being equipped with particular mobile sectors (10) which automatically go out during their insertion operation in order to contain and protect the sealing ring (7) of the head (1B).