The
belted rubber bellows of the GRB series are manufactured
of high-quality elastomer materials with vulcanized
wire belt. They therefore possess sound lateral
characteristics. The cover plate and the piston
are made of cast aluminum. Air spring of series
GRB have a load capacity up to 248 kN depending
on the version with a natural frequency between
0.7 and 1.1 Hz. The springs of GRB series are standard
elements for large foundation mountings.