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micronAir AU5000 Operator's Handbook Manual

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Micron Sprayers Limited
Bromyard Industrial Estate
Bromyard
Herefordshire
United Kingdom
Telephone: +44 (0) 1885 482397
Fax:
+44 (0) 1885 483043
E-mail:
micron@micron.co.uk
Web site:
www.micron.co.uk
AU5000
ATOMISER
Operator's Handbook
Parts Catalogue
HR7 4HS
and
Iss 13W
08/2013

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  • Page 1 AU5000 ATOMISER Operator's Handbook Parts Catalogue Micron Sprayers Limited Bromyard Industrial Estate Bromyard Herefordshire HR7 4HS United Kingdom Telephone: +44 (0) 1885 482397 Fax: +44 (0) 1885 483043 E-mail: micron@micron.co.uk Web site: www.micron.co.uk Iss 13W 08/2013...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1.0 INTRODUCTION .................. 1 2.0 SPECIFICATION .................. 2 3.0 TEN KEY POINTS FOR OPERATORS ..........3 4.0 INSTALLATION ..................5 4.1 Securing and Wire Locking of Atomisers and Fittings ....6 4.2 Alternative Mounting Clamps ............8 5.0 OPERATION..................
  • Page 4 12.0 APPLICATION MONITOR ..............38 13.0 RPM INDICATOR (TACHOMETER) ..........38 14.0 PARTS LISTS ................... 39 14.1 AU5000 Atomiser ..............40 14.2 Variable Restrictor Unit ............42 14.3 Diaphragm Check Valve............44 14.4 Special Tools Available from Micron Sprayers Ltd....45...

  • Page 5: Introduction

    The AU5000 atomiser has been designed to operate over a wide range of flow rates. The unit is ideally suited for all application techniques from conventional Low Volume (LV) spraying with water based formulations at 10 –...

  • Page 6: Specification

    For specialised pest control, public health spraying and similar work requiring continuous operation at high rotational speeds to produce very small droplets, Micronair recommend the AU4000 atomiser. This is a development of the AU3000 atomiser and uses the same bearings, brakes and installation kits.

  • Page 7: Ten Key Points For Operators

    3.0 TEN KEY POINTS FOR OPERATORS The following list of ten key points is intended to assist operators in the efficient use of Micronair atomisers. We hope that this section will encourage pilots and engineers to read the entire Handbook and follow its recommendations.
  • Page 8 Fig. 1 – Typical Installation of AU5000 Atomiser MICRONAIR AU5000 ATOMISER...

  • Page 9: Installation

    4.0 INSTALLATION Micronair AU5000 atomisers are suitable for use on a wide range of aircraft types and additional instructions are supplied with installation kits where applicable. The atomisers are either installed on the existing spray booms or are mounted on special Micronair booms that are then fitted in place of the original booms.

  • Page 10: Securing And Wire Locking Of Atomisers And Fittings

    4.1 Securing and Wire Locking of Atomisers and Fittings It is vital that the securing nuts and fittings of each AU5000 atomiser are wire (safety) locked in accordance with standard aircraft practice.
  • Page 11 Movement of the shock bush could cause the wire to wear a groove in the clamp and weaken it. Fig. 2 – Wire Locking of Atomiser and Components MICRONAIR AU5000 ATOMISER...

  • Page 12: Alternative Mounting Clamps

    4.2 Alternative Mounting Clamps Mounting clamps are available to install AU5000 atomisers on many different sections of round and streamline boom. Some of these are shown in the drawings below, together with their part numbers and dimensions. Operators must establish the correct clamp for their requirements and order by type, dimensions and part number.
  • Page 13 EX1705 – Qty 2 1.25” (32 mm) EX1740 EX3278 – Qty 2 1.5” (38 mm) EX1741 None 1.57” (40 mm) EX6980 None 1.625” (41 mm) EX3282 None 1.75” (44 mm) EX2427 None Fig. 4 – Clamps for Round Booms MICRONAIR AU5000 ATOMISER...

  • Page 14: Operation

    In fact, an important advantage of Micronair atomisers is that they can be adjusted to give either a very small droplet or a large droplet depending upon the requirement of a particular treatment.

  • Page 15: Operating Technique

    5.4 Operating Technique 5.4.1 Low Volume (LV) Spraying An aircraft fitted with AU5000 atomisers should be operated using a similar technique to one fitted with a conventional boom and nozzle system. The swath width will be a function of aircraft type, flying height, droplet size and climatic conditions.

  • Page 16: Health And Safety

    Irrespective of legislation, Micronair advise the users of their equipment that all possible care must be taken to ensure the health and safety of the user and personnel in the vicinity of the spraying operation.

  • Page 17: Calibration And Adjustment

    7.0 CALIBRATION AND ADJUSTMENT 7.1 General The calibration procedure for an aircraft fitted with Micronair atomisers is in two stages: adjusting the application rate (see 7.2) and setting the droplet size (see 7.3). Unlike conventional pressure nozzles, these two variables are largely independent and one can be changed without significantly affecting the other.

  • Page 18: Adjustment Of Flow Rate Through Atomisers On Ground

    VRU orifice (higher number). If the output is excessive, reduce the boom pressure or select a smaller orifice. Having established the appropriate VRU orifice and approximate boom pressure, the final adjustment of boom pressure must be made in flight. MICRONAIR AU5000 ATOMISER...
  • Page 19 52.0 78.0 130.0 11.2 12.6 14.0 21.0 28.0 56.0 84.0 140.0 10.5 12.0 13.5 15.0 22.5 30.0 60.0 90.0 150.0 FORMULA: Acres/min (approx) = Speed (MPH) x Swath (feet) ———————————— Table 2 – Acres Sprayed per Minute MICRONAIR AU5000 ATOMISER...
  • Page 20 FLOW THROUGH VRU WITH AU5000 ATOMISER WITH SECONDARY SHUT-OFF AND DIAPHRAGM CHECK VALVE SETTING PRESSURE FLOW PER MINUTE PER ATOMISER NUMBER Imp pints US pints Litres 0.51 0.61 0.29 0.98 1.18 0.56 2.19 1.45 0.68 1.35 1.63 0.77 1.66 2.01 0.95...
  • Page 21 FLOW THROUGH VRU WITH AU5000 ATOMISER WITH SECONDARY SHUT-OFF AND DIAPHRAGM CHECK VALVE SETTING PRESSURE FLOW PER MINUTE PER ATOMISER NUMBER Imp pints US pints Litres 0.79 0.95 0.45 1.03 1.25 0.59 1.40 1.69 0.80 2.19 2.64 1.25 3.32 4.01 1.90...
  • Page 22 Graph 1 – Flow from VRU Fitted with Standard Odd Numbered Plate 20 PSI BOOM PRESSURE 30 PSI BOOM PRESSURE 40 PSI BOOM PRESSURE VRU SETTING Graph 2 – Flow from VRU Fitted with Optional Even Numbered Plate MICRONAIR AU5000 ATOMISER...

  • Page 23: Droplet Size

    For example, droplets with a VMD of 150 microns require a rotational speed of 6000 RPM. Note that the droplet size produced by an AU5000 atomiser is influenced by the properties of the chemical being sprayed. In general, ULV formulations will tend to form smaller droplets than water-based LV formulations at the same rotational speed.
  • Page 24 Graph 3 – Relationship Between Droplet Size and RPM MICRONAIR AU5000 ATOMISER...
  • Page 25 Graph 4 – Relationship Between Atomiser RPM and Airspeed for Standard EX1772/2 Fan Blades MICRONAIR AU5000 ATOMISER...
  • Page 26 Graph 5 – Relationship Between Atomiser RPM and Airspeed for Optional EX2021/2 Long Fan Blades MICRONAIR AU5000 ATOMISER...
  • Page 27 Graph 6 – Relationship Between Atomiser RPM and Airspeed for Optional Short EX6353 Fan Blades MICRONAIR AU5000 ATOMISER...

  • Page 28: Setting Of Fan Blade Angle

    FAN BLADE SHOWN SET TO 35 DEGREES Fig. 5 – Adjustment of Fan Blade Angle IMPORTANT: Under no circumstances should any blade be set to exceed its maximum continuous RPM (see graphs 4, 5 & 6). MICRONAIR AU5000 ATOMISER...

  • Page 29: Fan Blades

    7.4 Fan Blades There are 3 alternative fan blades available for use with the AU5000 atomiser. Each type may be identified by its length, as shown in Fig. 6. It is important to identify which type of blade is fitted, and that the appropriate graph is used to determine blade setting (see Graph 4, 5, and 6), as described in 7.3.2.

  • Page 30: Alternative Gauzes

    8.0 MAINTENANCE OF ATOMISER 8.1 General The AU5000 atomiser is precision engineered from chemical resistant materials to ensure maximum reliability under field conditions. In order to obtain the best performance and longest life it is vital that atomisers should be regularly checked and cleaned.

  • Page 31: Pre-Flight Checks

    Remove the cap, together with the deflector assembly. Remove the bush from the front (threaded) end of the spindle. Push the spindle through the atomiser and remove through the end of the gauze. MICRONAIR AU5000 ATOMISER...

  • Page 32: Removal Of Gauze

    Remove the two grub screws securing the shock bush, using a 3/32" Allen key. Drive out the shock bush, using Micronair tool part number EX3903 or a pin punch inserted into the notches in the rear of the clamp.

  • Page 33: V-Ring

    An assembly tool is available from Micronair, part number EX4382. NOTE: If the bearing has been modified for direct greasing, the exposed balls should face INWARDS towards the front of the atomiser.

  • Page 34: Spindle

    8.5 Balance Both the hub assembly and the gauze of all Micronair atomisers are dynamically balanced. This ensures that the atomiser will run smoothly and without vibration, which might otherwise cause damage to the unit or its mounting. As the hub and gauze are individually balanced, any gauze may be fitted to any atomiser.

  • Page 35: Bearing Lubrication

    8.6 Bearing Lubrication All Micronair AU5000 atomisers manufactured after January 1982 are fitted with sealed ballraces. Earlier units were fitted with metal shielded ballraces. Under normal circumstances, both types will give several hundred hours service and need never be lubricated.

  • Page 36: Variable Restrictor Unit

    7, pulling back and rotating it through 90 degrees until it locks in the outward position, separating the two plates and providing an uninterrupted flow. To release the unit from the full flow position, turn the knob in either direction MICRONAIR AU5000 ATOMISER...

  • Page 37: Maintenance

    Using a spanner, unscrew the outlet fitting of the VRU. If this is tight, the body must be held by two locating holes under the knob at the opposite end to the outlet. A special key, part number EX1942, is available from Micronair to assist in dismantling the VRU.

  • Page 38: Diaphragm Check Valve

    IMPORTANT: The diaphragm is made from either reinforced Viton or PTFE. It must only be replaced with the appropriate Micronair spare part (CBP487 – Viton or EX2762 – PTFE). Should it be necessary to dismantle the unit completely, the procedure is as follows:...

  • Page 39: Chemical Resistance Of Diaphragms

    The air deflector is supplied either as a modification kit for existing AU5000 atomisers or may be supplied ready installed on new atomisers. The air deflector kit consists of the deflector plate, a special reduced diameter gauze, a modified end cap assembly and all necessary screws, washers etc.

  • Page 40: Calibration

    The dimensions of the air deflector and gauze have been chosen to provide a droplet size (VMD) substantially the same as a standard unmodified AU5000 atomiser under the same operating conditions. It should not, therefore, be necessary to change the atomiser rotational speed to produce the same droplet size as produced by the unmodified atomiser.

  • Page 41: Parts List

    Gauze Assy (14 mesh) 1) Alternatives EX5213/20 Gauze Assy (20 mesh) EX5214 Deflector EX2612 Screw SP123C Washer A206-C12 Screw Csk CBP2286 Screw 8.32 x 3/8" EX5211 AU5000 Air Deflector kit complete Fig. 8 – Air Deflector Kit MICRONAIR AU5000 ATOMISER...

  • Page 42: Application Monitor

    The application Monitor may be used to measure the rotational speed of each of up to 10 atomisers. These may be Micronair AU3000, AU4000, AU5000 or AU7000 units. In order to do this, each atomiser must be provided with a transducer and associated wiring etc.

  • Page 43: Parts Lists

    14.0 PARTS LISTS When ordering spare parts, please specify the following information: Serial number of atomiser Approximate date of purchase Description of part Part number as shown in this section Number of parts required MICRONAIR AU5000 ATOMISER...

  • Page 44: Au5000 Atomiser

    14.1 AU5000 Atomiser Item Part No Description Notes EX2478 Hub Body Assembly EX1514 EX1975 Washer EX2493 Spacer Bush EX2485 Bearing Retaining Plate EX2492 Washer Sealing A206C16 Screw 8-32 CSK EX2479 Washer, Sealing CBP663 Bearing CBP482 'V' Ring EX1510/20 Gauze Assy 20 Mesh...
  • Page 45 Fig. 9 – AU5000 Atomiser MICRONAIR AU5000 ATOMISER...

  • Page 46: Variable Restrictor Unit

    Cap, Blanking 1/4" NPT EX1672 Elbow 1/4" NPT EX2084 Body Assy (Alternative) 7/8" UNF Inlet EX2094 Body Assy (Alternative) 1/4" NPT Inlet EX1954 Inlet Adaptor 1/2" Hose EX2080 VRU Assy. Complete EX4156 VRU Assy. with Standard Fittings MICRONAIR AU5000 ATOMISER...
  • Page 47 Fig. 10 – Variable Restrictor Units and Optional Adaptors MICRONAIR AU5000 ATOMISER...

  • Page 48: Diaphragm Check Valve

    EX1530 CBP485 Spring EX1531 Plunger CBP486 Spring Clip CBP487 Diaphragm Viton (Standard) EX2762 Diaphragm PTFE (Optional) EX1526 Body Assy. EX1527 Cap Assy. Items 2,3,4 & 5 EX1525 Check Valve Assy. Complete Fig. 11 – Diaphragm Check Valve MICRONAIR AU5000 ATOMISER...

  • Page 49: Special Tools Available From Micron Sprayers Ltd

    The following special tools are available from Micron to assist with the maintenance of AU5000 atomisers and accessories. None of these tools are essential to carry out any work described in this Handbook but they are highly recommended for any workshop maintaining a number of atomisers.

  • Page 50: Conversion Factors

    1 bar = 14.50 pounds/sq in = 0.98 atmosphere Micronair is the registered trademark of Micron Sprayers Limited, Bromyard, United Kingdom. Every care has been taken in the design of this equipment and the preparation of this Handbook. However, Micron Sprayers Limited cannot accept responsibility for errors or the consequences thereof.
  • Page 51 MICRONAIR AU5000 ATOMISER...

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