These are similar to our N3190 nozzles but incorporate an automatic shut-off to prevent the operator from over-filling (min flow of 7.5 US GPM or 29 liters per minute for shut-off to work, max 80 US GPM). They are suitable for the high flow rates encountered in bulk fuel oil delivery and are commonly used in card locks and truck refuelling stations. This nozzle has a shear groove in the spout which breaks at 75 ft/lbs. Replacement spouts are available, see part number N3195RS-150.