BANG - INTRODUCTION
Contents
1. BLAM Nozzle O ring BLAM Expansion Plate A do crews 23 15 Appendix 3 Views of the Single Jet BLAM Vertical Discharge BLAM Horizontal Discharge BLAM Appendix 4 View of the Single Jet BLAM Complete Kit Expansion Plates Set Spare O rings OO Spare Nozzle Screws eeeee Allen Key Il Complete BLAM Assembly with 1 10 Expansion Plate 17 Appendix 5 Single Jet BLAM s Air Flow Rate Calibration Chart 4 5 4 y 0 0368x 0 4921 3 5 25 ll Mass Flow SLPM 15 Br a 0 5 0 10 20 30 40 50 60 70 Back Pressure PSIG 80 90 100 110 182. check to make certain that the following parts are all present and in undamaged condition e The BLAM assembly as seen in Appendix 1 e Box of accessories containing 4 expansion plates plate 1 10 is pre assembled on the nozzle by default 6 spare expansion plate mounting screws Allen wrench for the nozzle screws 2 spare nozzle O ring e Black plastic case Your BLAM may vary slightly in appearance depending upon the type of discharge vertical vs horizontal and fittings you requested Appendix 3 shows photographs of single jet BLAMs with vertical and horizontal discharge configuration An overview of all parts and accessories of the Single jet BLAM complete kit is given in Appendix 4 Any changes from the standard pieces listed above will be noted on your shipping memo PLEASE KEEP YOUR SHIPPING MEMO FOR FUTURE REFERENCE If you find that anything has been damaged in transit contact the carrier of the shipment immediately in addition to CH Technologies 2 2 Initial Testing After unpacking you should immediately check the operation of the device Your BLAM comes fully assembled so it ready to be used for a performance check Follow the steps outlined in Section 2 3 1 to set up and operate the device Use ONLY distilled water for initial testing When the air source is turned on mist should appear at the aerosol outlet as shown in Figure 2 If mist does not appear recheck all your fittings and make sure that jar is screwed i
3. have dried place the O ring back on the nozzle body and reassemble the nozzle 9 Apply some Teflon tape on the threads of the air stem and thread the nozzle using appropriate wrenches any servicing of the nozzle should take place after the device has been WARNING Ifthe BLAM has been used with pathogenic test articles properly decontaminated or autoclaved 11 3 DISCLAIMER The BLAM Atomizer is subject to all the terms of CH Technologies USA standard limited warranty The BLAM is a specialized article of research equipment intended for use by trained professionals No liability is accepted by CH Technologies USA on account of misuse misapplication or mishandling CH Technologies USA specifically does not condone nor endorse any application or use which involves restricting emissions from the device and thus causing pressurizing of the jar Further CH Technologies USA accepts no liability for exposure to toxic infectious or harmful substances resulting from the use of this apparatus 12 4 LIMITED WARRANTY CH Technologies USA warrants equipment of its manufacture to be free from defects in workmanship and material We make no warranty express or implied except as set forth herein CH Technologies USA s liability under this warranty extends for a period of one 1 year from the date of shipment It is expressly limited to repairing or replacing at the factory during this period and at CH Technologies USA s opt
4. Blaustein Atomizer BLAM Single Jet Model User s Manual Sr CH TECHNOLOGIES USA CONTENTS 1 General Description and Specifications 22ssessessesseeseeeseenen seen nn 3 1 1 Introduction Re 3 IDS PSCITICATONS eek leeren 4 1 3 Mechanism of Operation nenn er en 4 2 BLAM Operation ass ne ea 6 2 1 Unpackine thew LA Miss sa an 6 22 Inital Testini ausser iii 6 2 3 BLAM Operation Procedures er unsre es dai cee dates 7 23A Running the BEAM span tai gibi RGE AE en 7 2 3 2 Changing BLAM s Expansion Plates r 0ss0rsesseseeennnen 9 2 4 Cleaning Decontamination Procedures ccccee ence ence ence eeeneeeaeeeee 10 2 5 Nozzle Maintenance and Adjustment 0 cece cee ce eee e eee crente 11 3 Disclamer Reken 12 A Limited Wartantya nase anal krass 13 Appendix 1 Overview of Single Jet BLAM Assembly u useessessnen 14 Appendix 2 Single Jet BLAM s Exploded Diagram se messen 15 Appendix 3 Views of the Single Jet BLAM 2 220ss0sssesenesensnnen 16 Appendix 4 View of the Single Jet BLAM Complete Kit 42 200 17 Appendix 5 Single Jet BLAM s Air Flow Rate Calibration Chart 18 1 GENERAL DESCRIPTION AND SPECIFICATIONS 1 1 Introduction The Blaustein Atomizer BLAM is a high output atomizer that uses the jet nebulization principle of the Collison Nebuliz
5. are a function of the jet hole size depth of the liquid cavity and expansion cone size The standard single jet BLAM is equipped with a fixed size 0 010 diameter laser cut ruby which guaranties long lasting precision in the atomization process For specific applications the BLAM can be fitted with other non standard jet hole sizes The single jet BLAM comes with a standard set of five Expansion Plates with the following liquid cavity depths and expansion cone diameters Plate ID Cavity Depth Cone Diameter inch inch 1 10 0 001 0 020 1 30 0 001 0 030 4 30 0 004 0 030 4 40 0 004 0 040 10 40 0 010 0 040 The cavity depth and cone diameter values are etched on each plate to singularly identify them The various liquid film thickness controlled by the cavity depths of the plates allow for the use of mixtures having different viscosities and solid contents Furthermore shearing of thinner liquid films by the jet will result in finer aerosol droplets and vice versa Various expansion cone diameters combined with various cavity depths provide a fine control on the output of the device and particle size distribution of the aerosol See Appendices 1 and 4 for an overview of parts and accessories of the single jet BLAM 2 BLAM OPERATION 2 1 Unpacking the BLAM Your single jet BLAM and accessories come in a convenient carrying case When you receive your single jet BLAM you should unpack it carefully and
6. cleaning The slightest tear or cut on the O ring will result in an inappropriate sealing of the device and may result in leaking of the test article into the air The O ring should be changed at frequent intervals because it may deteriorate with time 10 2 5 Nozzle Maintenance and Adjustment To make sure that the BLAM performs consistently over long periods of time the nozzle should be serviced periodically The frequency of the service will depend on the usage intensity and type of test articles utilized The maintenance procedure of the nozzle is the following 1 Remove the nozzle from the air stem using appropriate wrenches 2 Remove the liquid feed barb fitting from the nozzle body 3 Use the provided allen wrench to remove the three screws that hold the expansion plate 4 Remove the expansion plate and lay it down on a clean work surface 5 Remove and carefully inspect the O ring that seal the expansion plate against the nozzle body refer to Figure 1 for details If it show signs of damage replace it a spare O ring from the accessories kit supplied with the BLAM 6 Visually inspect the jet hole against a light source and observe if there is any visible occlusion present in it If the jet hole is clogged place the nozzle body in an ultrasonic bath with distilled water for about 30 minutes 7 Wash the expansion plate and nozzle body with a mild soap solutions and rinse them well with tap or distilled water 8 After the parts
7. cted to the sonic air jet only one time The alternative design a multi jet BLAM can function in SPA mode or Multi Pass Atomization MPA mode where media is recirculated to the two or more sonic velocity air jets The BLAM is equipped with a vapor polished polycarbonate jar that is highly resistant to heat and mechanical stress but at the same time allows a clear visual of the atomization process inside the device As all other CH Technologies nebulizers the BLAM outlet is equipped with a vertical Jaeger joint connector that is the standard connector of our inhalation systems Other custom designed connectors are available upon request The complete CHT BLAM is best used as an atomizer that interfaces directly to CH Technologies systems and equipment but with suitable modifications also adapts to other non CHT equipment 1 2 Specifications Particle diameter Approximately 0 7 2 5 um Models available 1 jet Air flow rate 1 4 L min Operating Air Pressure 20 100 psi Liquid Feed Rate 0 1 6 ml min Discharge Vertical or Horizontal Material Stainless Steel 316 stem amp plates and Ploycarbonate jar amp head 1 3 Mechanism of Operation Knowledge of the mechanism of aerosol formation by the BLAM will help you in determining the aerosol characteristics as well as being useful for maintenance The atomizing head at the end of the air supply stem is the key to aerosol formation It is composed of two main parts Nozzle Body a
8. e is a solution containing pathogens make sure that the container is properly sealed with a ventilation hole on the lid Using a piece of thin silicon tube connect the outlet of the syringe or low flow peristaltic pump to the BLAM s liquid feed port N ATTENTION Make sure that all the connections between the liquid feed pump and the BLAM are air tight Using a 14 OD tube connect a compressed air line to the air inlet of the BLAM Use polyurethane tubing or one that that can withstand the pressure used BLAM s air inlet is equipped with a standard 4 push to connect fitting so the air line can be connected by simply pushing the tubing in If you BLAM comes with non standard fittings use appropriate couplers to connect the air line to the atomizer If you are not using any of CH Technologies system control units make sure that the compressed air line is equipped with appropriate pressure and flow controllers An illustration of a standard setup of the single jet BLAM is given in Figure 2 10 11 12 13 14 15 Connect the BLAM outlet to your system or application using appropriate fittings Make allowance for dilution of the aerosol outflow if desired Turn ON the liquid feed pump and adjust the feed rate as desired When the liquid reaches the liquid feed port of the BLAM turn ON compressed air supply to the device Using your flow controller adjust the air flow at about 2 L min If you need more output incr
9. ease first the upstream pressure of the compressed air line and then increase air flow rate to the atomizer A ATTENTION DO NOT exceed 90 psi upstream pressure When the atomization process is up turn OFF the liquid feed pump and in quick sequence shut down compressed air supply to the atomizer Remove the liquid feed tube from the liquid feed port on the lid Remove the compressed air line from the BLAM s air inlet Take the atomizer for cleaning decontamination Aerosol VALVE PRESSURE REGULATOR FLOWMETER z Compressed J Air EN A S p PRESSURE GAUGE SYRINGE PUMP BLAM E Bee ATOMIZER Figure 2 Schematic of Single Jet BLAM s Setup 2 3 2 Changing BLAM s Expansion Plates Your single jet BLAM comes preassembled with a 1 10 plate Depending on the nature of liquid to be aerosolized and desired characteristics of the aerosol you might need to replace the default plate with another one from the accessories kit As a general guidance use plates with a larger cavity depth and expansion cone diameter to handle more viscous liquid and or to obtain larger droplet size Follow these steps to change BLAM plates 1 2 Remove the jar from the BLAM lid Flip the stem so that the expansion plate of the nozzle faces up Using the provided allen wrench remove the three assembly screws Remove the expansion plate Select the appropriate expansi
10. er which has long been the recognized as the technique for the efficient aerosolization of various liquids However the BLAM relies on a new patent pending design which allows for a more efficient generation of aerosol than the Collison or other existing devices This innovative design allows users to produce liquid aerosol at high particle concentrations and very narrow particle size distribution The BLAM is superbly suited to handle various liquid media such as water based drug solutions solvent based mixtures and biological test articles such as bacterial and viral suspensions The single jet BLAM was specifically designed to provide bioaerosols with enhanced viability of pathogenic microorganisms for aerobiology research The particle size distribution of the aerosolized mist will depend on the nature of the liquid test article However for most solutions and suspensions the BLAM will deliver a narrowly distributed mist that falls well within the respirable cutoff The BLAM features a modular design composed of five interchangeable plates which enables it to perform the tasks of multiple nebulizers By interchanging one or two parts the atomizer can accommodate liquids of varying properties to produce aerosols in specific size ranges and output concentration The single jet BLAM is used in one pass mode with the liquid feed being injected externally by a metering device In Single Pass Atomization SPA mode the liquid medium is subje
11. g with your own QA QC wipe tests or similar assessments The cleaned BLAM parts should be allowed to air dry or they may be dried with warm forced air If your tests involve atomization of viscous suspensions or you are switching from one test article to another an additional step is needed to make sure that the jets are freed from any occlusion from solids that may dry inside the nozzle and or the nozzle is free from any residuals that may cause cross contamination To do this after cleaning the parts externally feel the jar with few milliliters of water and run the BLAM for a few minutes in MPA mode As clean water is atomized it washes the cavities inside the nozzle and the jet holes WARNING Whether you are using the BLAM in SPA or MPA mode IN always replace the internal liquid aspiration feeding tube during the cleaning decontamination process when you switch from one test article to another to avoid potential cross contamination Autoclaving can be used to decontaminate the BLAM parts if the device is used with pathogenic test articles If you opt for autoclaving you should first contact CH Technologies in order to establish appropriate guidelines for cleaning under high temperature and pressure WARNING If autoclaving or decontamination with corrosive chemicals is not carried out properly it may cause mechanical damage and or chemical corrosion to various BLAM parts The O ring in the BLAM s lid should be inspected during each
12. ion any device or part which shall within one year of delivery to the original purchaser be returned to the factory transportation prepaid and which on examination shall in fact be proved defecting CH Technologies USA assumes no liability for consequential damages of any kind The purchaser by acceptance of this equipment shall assume all liability for consequences of its misuse by the purchaser his employees or others This warranty will be void if the equipment is not handled installed or operated in accordance with our instructions If damage occurs during transportation to the purchaser CH Technologies USA must be notified immediately upon arrival of the equipment A defective part in the meaning of this warranty shall not when such part is capable of being repaired or replaced constitute a reason for considering the complete equipment defective Acknowledgment and approval must be received from CH Technologies USA prior to returning parts or equipment for credit No representative of ours has authority to change or modify this warranty in any respect 13 Appendix 1 Overview of the Single Jet BLAM Assembly a Jaeger Joint Air Stem Air Inlet Fitting x Compression Nut Outlet Liquid Feed Port O ring Lid Liquid Feed Tube a Polycarbonate Jar Atomization Nozzle 14 Appendix 2 Single Jet BLAM s Exploded Diagram Lid With Aerosol Outlet Lid O ing am BLAM Nozzle Body
13. n tight The operation of the BLAM depends upon it being a completely sealed unit Perform a visual inspection of the jet operation and make sure that none of them appears to be aerosolizing less than others or not at all All the jets are identical and should perform exactly the same 2 3 BLAM Operation Procedures 2 3 1 Running the BLAM Your single jet BLAM comes already preassembled and ready to run by simply connecting it to a regulated air source and liquid feed metering device Follow these steps to run the single jet BLAM 1 2 Remove the BLAM jar Check the silicon tubing that connects the liquid feed port on the nozzle with the liquid feed bulkhead on the lid and make sure that is not loose Fill the jar with about 20 30 ml of test solution and reassemble it into the lid Make sure that the assembly is air tight ATTENTION DO NOT fill the jar excessively The solution in it serves only the purpose of a soft impaction surface for the aerosol and it will not be used for atomization If you will use a syringe pump for feeding the BLAM fill the syringe with the predetermined amount of test solution and place it in the pump Use a syringe large enough so that the BLAM does not run out of liquid before the atomization session is up If you are using a low flow peristaltic pump instead fill a glass beaker with the predetermined amount of liquid and dip the inlet end of the pump s tube in it If your test articl
14. nd Expansion Plate Figure 1 Compressed Air Nozzle Body ia PDP NWA A Jet Insert we Assembly Screw Jet Ruby Expansion Plate Expansion Cone Figure 1 Components of Single Jet BLAM s Atomizing Nozzle The atomization occurs when the pressurized air coming from the stem pushes at sonic velocity through a precisely laser cut ruby crystal pressed into the Nozzle Body The jet is a 0 010 orifice through which pressurized air flows at a constant velocity This process creates a powerful vacuum effect in the cavity 0 002 to 0 010 deep between the Nozzle Body and Expansion Plate which drives the liquid from the liquid cavity to the jets The liquid then reaches a depression in the form of a well around the jet where is aspirated in and sheared into tiny droplets as the air expands after the jet The liquid solution is pumped in at a controlled feed rate through the liquid feed port located on the rear of the Nozzle Body The aerosol generated by the atomization process is sprayed downwards and after impacting the surface of the liquid inside the jar it makes a 180 turn and it is forced up the outlet tube on top of the BLAM lid During this process larger droplets are collected on the liquid surface due to impaction as they cannot make the U turn The end result is a very fine mist well within the respirable range and with narrow size distribution The properties of the aerosol generated by the single jet BLAM
15. on plate from the accessories kit and place it onto the O ring so that the ID numbers etched on the face of the plate are opposite the liquid feed channel Figure 3 This will confirm the liquid feed channels of the two parts are aligned Numbers Up 4 e of o Media Channel Down Figure 3 Positioning of the Expansion Plate on Nozzle Body Secure the plate on the nozzle body using the three assembly screws If necessary use a tiny rod to align the holes Tighten the screws with the supplied allen wrench in a circular pattern 1 ATTENTION Tighten the screws in two stages first slightly tight and then snug Make it leak free but do not over tighten Re assemble the jar into the lid Your BLAM is ready to be used the newly assembled expansion plate 2 4 Cleaning Decontaminating Procedures Your BLAM should perform indefinitely if it is cleaned and maintained properly The device should be cleaned after each use If you are using your BLAM with any aqueous solutions that contain no pathogens cleaning with a mild soap solution in warm water is generally adequate Depending on the test article used special solvents may be used in certain cases Be sure that the O rings are compatible with any solvents used Special chemical resistant O rings are available from CH Technologies if needed Distilled water is a good choice for the final rinse warm tap water may work also You must judge the success of your cleaning rinsin
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