Whats the difference between a P30 fill nozzle and a P36 fill nozzle, and what about about types 1, 2 and 3?
Good question. The most common system used in North America for CNG fueling is the NGV1 standard. The part that goes on the fueling device (i.e. at the end of the hose) is called the NOZZLE. The part that mounts to the vehicle is called the RECEPTACLE. There are two different sizes of both these components; the P30 is for 3000PSI service, and P36 is for 3600PSI service. P36 nozzles are usually yellow, while P30 nozzles are blue. In order to prevent a P36 nozzle from connecting to a P30 receptacle, the P30 receptacle is 1mm larger in diameter at the rear: There are venting (Type-1) and non-venting (type-2 and type-3) nozzles. Type-1 nozzles release pressure built up in the fuel hose at the nozzle end by operating a manual “fill/vent” valve on the device after refueling is complete. The relieved gas pressure is then diverted to a separate hose leading back to the refueling apparatus to be vented to atmosphere or fed back into the compressor. A type-1 nozzle can also vent directly to atmo
