SPRAY NOZZLES FOR INDUSTRIAL APPLICATIONS

SPRAY NOZZLES PNR ITALIA manufactures and markets small spraying nozzles for individual use up to spraying systems for large industrial plants and is able to meet every customer's need with targeted solutions. The wide range of products includes spray nozzles, washing heads and complementary accessories such as filters, guns and hoses for industrial washing, ejectors, blow nozzles, joints and hose clamps. Located in Voghera, not far from Milan, the Headquarter and production plant is located in a strategic area favored by the proximity to the main motorway networks and important international...

2 INTRODUCTION 4 GUIDE TO PNR ATOMIZERS 6 ULTRASONIC ATOMIZERS 8 CLASSIC ATOMIZERS 17 PRESSURE ATOMIZERS-EXTERNAL MIX 23 LARGE SIZE ATOMIZERS

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 the...

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 two-phase...

GUIDE TO ATOMIZERS An atomizer is a spraying device capable of generating extremely fine droplets. The term "atomization" refers to the separation of a liquid volume that leads to the formation of a dispersion of liquid particles (droplets). Types of Atomization: • PNEUMATIC (TWO-PHASE/DUAL-FLUID) ATOMIZATION: Occurs using a compressible fluid, such as air, steam, or gas. • HYDRAULIC ATOMIZER: A device capable of atomizing liquid at medium-to-high pressures. MA ULTRASONIC AIR-LIQUID ATOMIZER Produces a fine mist by passing droplets through a sound wave field. This is achieved by hitting a resonator...

MW-C AIR-LIQUID ATOMIZER WITH CLEANING NEEDLE Features an integrated mechanism with an external manual button to prevent or remove orifice clogs. MW-D AIR-LIQUID ATOMIZER WITH SHUT-OFF AND CLEANING NEEDLE Includes an internal mechanism integrated with a manual button (cleaning) and an adjustment screw to regulate liquid delivery. MX SERVO-CONTROLLED AIR-LIQUID ATOMIZER A pneumatic nozzle that mixes compressed air and liquid using a servo-controlled mechanism with ON/OFF function, regulating the spray at various intervals. MX MINI COMPACT SERVO-CONTROLLED AIR-LIQUID ATOMIZER Provides the same...

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 precision...

ULTRASONIC ATOMIZERS 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 identification for one of 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 flow...

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, that...

CLASSIC ATOMIZERS 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. 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 different type allows for mixing the fluids just after they...