The process yields a flour-like powder with a 7% moisture content, which is air cooled and pneumatically transported to a receiving vessel.
During the moling process, a pneumatically-driven machine known as a mole forces its way through the soil along the desired path of the pipe.
It is pneumatically driven and takes 4 seconds to switch from the traveling position to the digging position.
The hydraulic ram may be powered manually, pneumatically, or electrically.
A rigid facing (often pneumatically applied concrete, otherwise known as shotcrete) or isolated soil nail head plates may be used at the surface.
The bag of the redpipe is stuffed with filling material and a pneumatically driven automatic valve that controls the pressure of the bag.
The new gearbox is electrically controlled instead of pneumatically controlled, saving weight by eliminating the pneumatic system.
Emergency extension can be accomplished pneumatically in case of hydraulic or electrical system failure.
