Double Convoluted Bellows
Auxiliary spring or additional springs are working in coherent with airspring as an essential part of secondary suspension system.
Belted air springs allow for increased load-bearing capacity in bolstered bogies when compared with conventional bellows.
Double Convoluted Bellow
It is the simplest solution for air-suspended secondary springs.
Ideal for use in bolsterless bogies, including those used for high-speed trains, and in local or metro trains.
Mainly used in extremely confined spaces in trams and low-floor bogies.