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Diagram of a fireplace hand-bellows. A bellows or pair of bellows is a device constructed to furnish a strong blast of air.The simplest type consists of a flexible bag comprising a pair of rigid boards with handles joined by flexible leather sides enclosing an approximately airtight cavity which can be expanded and contracted by operating the handles, and fitted with a valve allowing air to ...
An expansion joint is designed to allow deflection in the axial (compressive), lateral (shear), or angular (bending) deflections. Expansion joints can be non-metallic or metallic (often called bellows type). Non-metallic can be a single ply of rubberized material or a composite made of multiple layers of heat and erosion resistant flexible ...
The expansion or contraction of the bellows is used as an actuator to control a certain movement. Valve sealing: A bellows is used between the housing and the valve stem to seal the inside completely from the outside world.
Axial expansion joints are suitable for internal and external overpressure. If pressure is applied to the outside of the metal bellows of axial expansion joints, the expansion joints permit very large axial movements in case of internal pressure in a pipeline.
Toroidal Expansion Joint - U.S. Bellows, Inc. A Toroidal expansion joint is a metallic assembly that consists of a series of toroidal convolutions which are circular tubes wrapped around pipe ends or weld ends and have a gap at the inside diameter to allow for axial stroke while absorbing changes in expansion or contraction of the pipe line. [1]
A hinged expansion joint is a metallic assembly, that can rotate in a single plane, used to absorb changes resulting from piping thermal expansion or contraction. [ 1 ] Hinged Expansion Joint - U.S. Bellows, Inc.
US Bellows is a manufacturer of metal bellows, fabric expansion joints, and metallic expansion joints including refractory lined, hinged, gimbal, slip-type, in-line pressure balanced, and elbow pressure balanced expansion joints.
The Expansion Joint Manufacturers Association is an organization of metal bellows expansion joint manufacturers.It was founded in 1955 to create and maintain a set of standards for quality expansion joint design and manufacturing. [1]
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