Storage Cylinders

The storage cylinders for CNG fuel are housed in metal frames that are bolted to the truck body or chassis. These structures are designed to protect the cylinders in a collision. Each individual cylinder has a valve at one end which allows the fuel in that cylinder to be isolated from the rest of the fuel system. During regular operation, all cylinder valves are open, although some operators prefer to close one cylinder and use it as a reserve tank. The fuel management module FMM is equipped with a 1 4 turn shutoff red handle valve which isolates the fuel storage system from the engine for emergency situations. This valve is OPEN for normal operation.