CATALOGUE - AIR ASSISTED ATOMIZERS
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SPRAY NOZZLES FOR INDUSTRIAL APPLICATIONS

SPRAY NOZZLES FOR INDUSTRIAL APPLICATIONS PNR ITALIA manufactures and markets Today PNR ITALIA has at its disposal a technologically advanced small spraying nozzles for individual use production plant for the production of spraying nozzles, washing up to spraying systems for large heads and atomizers with absolute quality machines, many of industrial plants and is able to meet which work with CNC technology, often internally designed for every customer’s need with targeted special machining. With an annual production of about 9 million pieces, PNR ITALIA is The wide range of products...

ULTRASONIC ATOMIZERS CLASSIC ATOMIZERS PRESSURE ATOMIZERS - INTERNAL MIX SIPHON ATOMIZERS PRESSURE ATOMIZERS - EXTERNAL MIX LARGE SIZE ATOMIZERS SPECIAL ATOMIZERS HYDRAULIC ATOMIZERS GENERAL INFORMATION PNR Italia Headquarters Voghera (PV)

INTRODUCTION AIR ASSISTED ATOMIZING Several industrial processes need the atomizing of liquids into fine and very fine droplets. This result might be achieved by means of a purely hydraulic nozzle, with the liquid being fed at high pressure through a very small orifice, but the process would originate two main problems: • Requiring costly investments and complicated lay-out. • Originating plugging problems because of the small orifice dimensions. In the majority of industrial processes a fine liquid atomization is obtained by means of air assisted atomizers, where compressed air supplies...

getti atomizzati sono state ampiamente sviluppate negli ultimi anni, con la realizzazione di nuovi efficienti tipi di atomiz Inoltre la crescente sofisticazione dei processi industriali ha richiesto una maggior precisione nella definizione delle pro getto, allo scopo di ottenere risultati ripetibili. I più importanti parametri che definiscono un getto atomizzato sono stati PROPERTIES OF A LIQUID SPRAY come illustrato nel seguito, e sono ora disponibili per l’ingegnere progettista di processo. The atomization of a liquid by means of a compressible fluid, like air, steam or a gas, is defined...

ULTRASONIC ATOMIZERS Ultrasonic atomizers operate on a very sophisticated process which is based on two steps: In the first one tiny water jets are injected into an high speed air flow which provides a first break up and atomization of the fluid. In the second step the two phase flow, air entraining liquid droplets, goes trough a field of sound waves which produce a further break up and a lower droplet dimension. This is realized through an impact between the two phase flow and a resonator located in front of the nozzle orifice. Ultrasonic atomizers can only be manufactured with high...

ULTRASONIC ATOMIZERS ATOMIZERS AND FITTINGS Ultrasonic atomizers produce the finest sprays available with air assistance for industrial processes, with a narrow angle full cone jet. Water and air do not mix in a confined volume before leaving the nozzle and therefore their feed pressures can be adjusted independently without influencing each other: this allows for a very wide regulation range on the liquid capacity and makes it easier to reach the desired operating conditions. Please note that the code given in the table only refers to the atomizing head and must be completed with the...

CLASSIC ATOMIZERS Classic atomizers are devices producing an atomized spray with the assistance of compressed air, where the liquid is broken into droplets when its outer surface is subjected to shear action from the high speed air flow. By assembling together a range of standard components in different materials, several different capacity values, spray patterns, spray angles and operation modes can be obtained. In addition, specific application problems can be addressed by the use of special accessories available on request. ATOMIZER SET-UP The set-up is the device where air and liquid...

CLASSIC ATOMIZERS SPRAY SET-UP A spray set-up is made out of a liquid nozzle and an air nozzle. When assembled the air nozzle fits precisely onto the liquid nozzle and the combination of the two provides the correct inside geometry to produce the spray. Such parameters of the two parts as the number, dimensions and profile of their inside passages determines all the characteristics of the atomized spray produced by that given set-up. A set-up can be selected according to the choices below. The capacity tables in the following catalog pages show the specification of each individual set-up,...

CLASSIC ATOMIZERS ATOMIZER FEEDING An atomizer can work on two different liquid feed principles, that is: • Liquid is supplied to the atomizer through a line under pressure • Liquid is aspirated by the atomizer from a container at ambient pressure. PRESSURE PRINCIPLE SIPHON PRINCIPLE It is the most widely used, and therefore a large range of capacities and spray patterns are available. Liquid capacity, air capacity and droplet sizes can be adjusted by regulating air and liquid feed pressures and the two fluids are mixed inside the atomizer prior to be ejected (Internal mix atomizers). A...

CLASSIC ATOMIZERS MW BODY TIPES AND OPTIONS COMPLETE CODE To obtain the complete code for an atomizer it is necessary to use the set-up code you have choosen from the performance table and complete it with the code for body and options as follows: • Replace the first two letters in the set-up code (SU) with the code for standard body (MW). • Add the code for the material you require. • Add the code for the required options, if any, and the thread type code. CONNECTION G = BSP Female (EU) N = NPT Female (US) = AISI 303 Stainless steel BASIC BODY SHUT-OFF NEEDLE CLEANING NEEDLE CLEAN AND...

CLASSIC ATOMIZERS MX BODY TIPES AND OPTIONS AIR ACTUATED ATOMIZER MX bodies contain an air actuated cylinder which controls the spray operation by means of a needle, opening or closing the water inlet in the liquid nozzle. Normally the air used for atomizing the liquid flows continuously, while the air to the actuator is used to start and stop the atomizing cycles. For longer idle times between two atomizing cycles, where too much atomizing air would be wasted, sequenced shut-off should be organized for the two air lines. The actuator air should be stopped (and the liquid flow interrupted)...