Brake Cylinder

These cylinders consist of the cylinder barrel with compressed air connection and cylinder cover. Fitted in the cylinder are the piston with guide tube and the piston return spring. The piston packing seals off the working chamber from the cylinder chamber, which is not under pressure. The mounting bracket serves for attachment of the brake cylinder to the vehicle or bogie frame. The mounting bracket can be either permanently attached to the cylinder body or it cane be removal type.
For brake application, compressed air is admitted to the piston moving it against the force of the compression spring. The piston rod is carried along at the same time and transmits the piston thrust to the brake rigging. For release the brake cylinder is exhausted and the compression spring moves the piston back into its initial position. The external rigging return spring provided in case of the B type cylinder ensures that the brake rigging with the piston rod follows the piston.