GRACO RAC IV Reverse A-Clean Switch Tip Airless Düse
Graco uses a unique numbering system for airless spray nozzles. The last three digits = 331 Simply multiply the first number by 5 and you will get the spray pattern for the paint application. In this case, the first number = “3”; this corresponds to an angle of 30 ° multiplied by 5 = 20 cm. So you get a spray pattern of 20 cm = spray width. The last two digits “13” indicate the nozzle size (bore) in thousandths of an inch = 31 mils = 0.031 inches / (= 0.78mm) = orifice size = (the amount of material passing the nozzle).