Single Convoluted Air Spring/Air Suspension Spring FS330-22 647 /
W01-358-6994 Air Bags
OEM NUMBER
Contitech | FS330-22 647 |
Firestone | W01-358-6994 |
PRODUCT DRAWING
DESCRIPTION
The two major types of air spring are the rolling lobe (sometimes
called reversible sleeve) and the convoluted bellow. The rolling
lobe air spring uses a single rubber bladder, which folds inward
and rolls outward, depending on how far and in which direction it
is moved. The rolling lobe air spring is available with very high
usable stroke length—but it is limited in strength because of its
tendency to bulge, and therefore, has limited force capacity. The
convoluted bellow type air spring uses one to three shorter
bellows, with the multiple units being reinforced by a girdle hoop.
Convoluted air springs are capable of ten times the force of a
rolling lobe version and twice the life cycle rating, but have less
usable stroke to work with.
Air springs have been used in heavy duty vehicle suspension systems
for nearly a century, where they have been able to provide
usefulness by taking advantage of the compressed air required for
vehicle braking systems. Air springs have provided a two-fold
advantage over mechanical leaf- or coil-springs. One advantage with
air suspension is the extra comfort provided by being able to vary
the air pressure inside the spring, which changes the spring rate,
and therefore, ride quality. Additionally, because variable control
over air pressure adjusts the deck or trailer height, aligning
loading docks to the level of the deck is possible when dock plates
are unavailable.
For coil-sprung vehicles, the air springs fit directly into the
coil spring, then are expanded by adding air pressure to support
the coils and prevent them from completely compressing, creating a
smoother ride and restoring any ride height lost when a heavy load
is applied.
Installation is fast and simple and most of our applications do not
require you to drill into your vehicle’s frame.
