What type of system is responsible for the transfer of CNG between storage cylinders and vehicles?

The transfer system is specifically designed for the movement of compressed natural gas (CNG) between storage cylinders and vehicles. This system ensures that CNG is delivered efficiently and safely, allowing for the proper handling of gas during the refueling process. It includes components like hoses, valves, and connectors that are engineered to withstand high pressure and prevent leaks.

In this context, the other systems listed serve different functions. The pumping system generally relates to moving liquid substances, but CNG is gaseous, and the transfer process does not necessarily require pumping in the traditional sense. The decanting system often pertains to transferring liquids rather than gases, and while compression systems are involved in the initial stages of CNG handling, such as compressing natural gas for storage, they don't directly manage the transfer process between the storage cylinders and vehicles. Thus, the transfer system is the most accurate descriptor for the mechanism involved in CNG transfer operations.