A bellows is a tool for delivering pressurized air in a controlled quantity to a controlled setting. Basically, it is a deformable container having an outlet nozzle and when the volume of the bellows is minimized, through the outlet the air escapes. In order to ensure that air enters only through the inlet and exits only through the outlet, usually, the bellows has a separate inlet, and valves or flaps in it.
In industrial and mechanical applications such as rod boots, machinery way covers lift covers and rail covers, bellows are widely used. Moreover, they are on articulated buses and trams, to cover the joint where the vehicle bends. Bellows tubing is lightweight, flexible, extensible tubing that can be used for delivery of gas or air at near ambient pressure, as in early aqua-lung designs.
Gortite bellows are the protective bellows that provide covers for cylinder rods and shafts, actuating screws, machine ways and linear rails etc. Other uses of these bellows include flexible connections, expansion joints and camera bellows. However, the industries they serve have expanded to medical and dental equipment, photographic equipment, material handling and packaging machinery, plastics machinery and also transportation vehicles. However, there are some ptfe bellows that are used in harsh chemical environments, for example: paint mixing tanks.
Welding is a process where, metals are joined by melting the parts and then using a filler to form a joint. Using different energy sources, from a gas flame or electric arc to a laser or ultrasound, usually welding process is done. In order to protect the eyesight of other people welding curtains are used in the industries.