Micron Sprayers HERBIFLEX-4 User manual

Bromyard Industrial Estate, Bromyard,
Herefordshire, HR7 4HS, UK
Tel: + 44 (0) 1885 482397
Fax: + 44 (0) 1885 483043
E-mail: [email protected]
URL: http://www.micron.co.uk
HERBIFLEX-4
Instruction Manual

20
DECLARATION OF CONFORMITY
DECLARATION:
I declare that as the authorised Representative, the above information
in relation to the supply/manufacture of this product is in conformity
with the requirements of the Machinery Directive 89/392/EEC as
amended by 91/368/EEC, 93/44/EEC and 98/37/EC and complies with
the relevant essential health and safety requirements.
Signature of authorised Representative:
Name of manufacturer or supplier: Micron Sprayers Ltd.
Full postal address: Bromyard Industrial Estate,
BROMYARD, Herefordshire
Country of origin: England
Post code: HR7 4HS
Description of Product: Battery powered, hand-held
agricultural spraying
machine.
Name and model number of machine: HERBIFLEX-4
Place of Issue: Bromyard, England
Name of authorised representative: G. S. Povey
Position of authorised Representative: Joint Managing Director
1
DESCRIPTION
The HERBIFLEX-4 is a hand-held, shrouded, spinning disc, Controlled Droplet Ap-
plication (CDA) sprayer. It is powered by four torch (D-cell/R20) batteries, with one
set of good quality batteries giving over 30 hours spraying time. It is designed to ap-
ply herbicides in adjustable narrow bands of between 10 and 75 cm at low volumes
(10 to 30 litres/hectare). A governed electric motor spins the atomiser disc at a con-
stant 2,800 rpm to produce uniform spray droplets of around 200 micron; large
enough to minimise any risk of spray drift. Liquid is fed by gravity through colour
coded feed nozzles.
CONTENTS Page
Description ..................................................................................................................1
Safety...........................................................................................................................2
Operator protection .....................................................................................................3
Preparing for spraying ........................................................................... .....................3
Before spraying for the first time.................................................................................4
Mixing, filling and calibration ....................................................................................6
To start spraying .......................................................................................................11
To stop spraying ..................................................................................... ..................11
After spraying ...........................................................................................................12
Storage.......................................................................................................................14
Optional extras ..........................................................................................................14
Troubleshooting ........................................................................................................15
HERBIFLEX-4 Extra ............................................................................. ..................16
Parts List / diagram HERBIFLEX-4 (Basic)........................................................17/18
Parts List / Micropak 5 litre backpack and optional extras ......................................19

2
The HERBIFLEX-4 can be used to apply bands of herbicides around buildings, fence
lines, borders and pathways as well as for treatment between crop rows. The weight
of the machine ready to spray, with the Micropak 5 litre backpack, is 7 kg.
Specially designed Micron Micropak backpacks and a shoulder strap are available for
use with the HERBIFLEX-4. Other optional extras include an atomiser cone housing
(B 120) which allows a wider band to be sprayed and a spray shield (for use with the
standard A90 atomiser cone housing only).
The sprayer can also be supplied with a valve/handle conversion, as the HERBI-
FLEX-4 Extra, which allows Micron spray bottles to be fitted directly to the sprayer.
SAFETY
Using agrochemicals is a hazardous process. Operators should comply with all
relevant legislation and/or regulations governing the use of agrochemicals and should
use appropriate personal protective equipment (see 'OPERATOR PROTECTION').
Never use the HERBIFLEX-4 in potentially explosive atmospheres or spray
flammable liquid through it.
The HERBIFLEX-4 can be used with most conventional herbicides, as well as
specific CDA formulations (only available in some countries) to provide a closed
transfer system to improve operator safety.
Never eat, drink, or smoke when working with agrochemicals. After using
agrochemicals or handling equipment wash your hands thoroughly. Keep people
(especially children) and animals out of areas being sprayed.
Always store agrochemicals safely to protect people and animals, and to safeguard
the environment (take special care to avoid water pollution). See spraying sections
for guidelines on safe use of the HERBIFLEX-4 in operation.
Always read the product label carefully to
discover:-
♦ approved applications
♦ maximum dose rates
♦ maximum number of treatments
♦ operator protection required
♦ necessary environmental protection
measures
N.B. ‘Dose rate’ refers to the amount of chemical product applied per hectare.
19
OPTIONAL EXTRAS (not shown)
PART NO. DESCRIPTION
5074A ATOMISER CONE HOUSING, B120 (C/W 2X 5027)
5140A FEED NOZZLE, YELLOW + 'O'RING (5151)
5141A FEED NOZZLE, ORANGE + 'O'RING (5151)
5142A FEED NOZZLE, RED + 'O'RING (5151)
5171A SPRAY SHIELD (FOR USE WITH ATOMISER CONE HOUSING A90)
5107C SHOULDER STRAP
5404A MICROPAK BACKPACK, 5 LITRE COMPLETE
5207A MICROPAK BACKPACK, 10 LITRE COMPLETE
5505A MICROPAK BACKPACK, 15 LITRE COMPLETE
PART
NO. DESCRIPTION QTY.
5172 TAP, IN-LINE SYPHON 1
5208A CAP, COMPLETE 1
5208 CAP, BLACK 1
5210 BALL, 3/16" DIA, POLYPROYLENE 1
5346 SEAL, CORK 1
5404 BACKPACK, 5 LITRE 1
5107/125 STRAP, 5 LITRE BACKPACK 2
5413 CLIP, HOSE, SIZE CC, NYLON 1
5414/90 TUBE, 8MM, ID X 12MM OD - 0.9M 1
5448 AIR BLEED VALVE BODY 1
5449 FILTER BOWL 1
5464 CLIP, HOSE, NO 12, WINGSCREW 1
MICROPAK 5 LITRE BACKPACK PARTS LIST

18
PARTS DIAGRAM - HERBIFLEX-4 AND MICROPAK 5 LITRE BACK-
3
OPERATOR PROTECTION
Always wear the protective clothing items listed on the product label for mixing and
filling. The minimum protective clothing required for spraying with the HERBI-
FLEX-4 is:
♦ rubber gloves and boots
♦ boots/shoes and long trousers
♦ eye protection
♦ long sleeved shirt
PREPARING FOR SPRAYING
The sprayer is delivered in a collapsed form. To assemble ready for spraying:
Note:
a) Acoustic information: the sound pressure level at the operator's ear does not
exceed 70 dB(A).
b) Vibration: the weighted RMS acceleration value at the hands when using this
machine does not exceed 2.5 m/sec2.
1) Extend the sprayer and securely connect the feed tube to the flow valve.
Instructions on assembling Micron Micropak backpacks are contained in the
tank. The shoulder strap (if supplied) should be connected to the battery case
end cap.

4
BEFORE SPRAYING FOR THE FIRST TIME
Before spraying for the first time use water and liquid detergent only to familiarise your-
self with the sprayer and check the spray pattern produced.
Put around half a litre of water in backpack or bottle and add a small amount (one to two
ml) of liquid detergent such as household washing up liquid. The detergent is important
to reduce the surface tension in the liquid feed tube and helps ensure an even flow. With
the sprayer in the spraying position, check for leaks.
Switch on the sprayer and then open the
flow control valve. Again check for
leaks.
When spraying, the spray head should be held 5-7 cm
above the ground or top of weed canopy with the lance at an angle of 35-40oto the
ground. Spray on one spot for around 10 seconds, preferably on a clean dry surface e.g.
concrete where you will be able to see the spray pattern produced.
2) Remove the switch end
piece as shown on the label. 3) Insert four batteries (D-cell/R20) negative, i.e. flat, end first.
17
HERBIFLEX-4 (BASIC) PARTS LIST
PART
NO. DESCRIPTION QTY
4256 SPRING, 5/16" OD X 1-1/8" 1
4309/110 TUBE, 5MM ID X 8MM OD - 1.10M, PVC CLEAR 1
4447 SPRING HOLDING PIN 1
4460 LABEL, BATTERY ON/OFF 1
4629/107 WIRE, 0.5MM FLAT TWIN - 1.07M 1
4646 SCREW, NO. 6 X 3/8" S/T POZI FLANGE/HEAD AB 2
4747 CLIP, 'P' 1
4896A ATOMISER CONE HOUSING, A90 (C/W 2 X 5027) 1
4897 MOTOR HOUSING 1
4900 MOTOR COVER 1
4901 EXTENSION TUBE PIECE, HEX. 1
4908A FEED NOZZLE, WHITE + 'O' RING (5151) 1
4910A ATOMISER BOTTOM CONE ASSEMBLY 1
4911 DEFLECTOR 1
4916 MOTOR TERMINAL COVER, PVC 1
4921 NUT, M5, DOME, NYLON 1
4930A FEED NOZZLE, BLUE + 'O' RING (5151) 1
4939 SCREW, NO. 4 X 1/2" S/T, POZI, PAN/HEAD, AB, S/S 4
4943 WASHER, 5.0MM X 11 X 1, FLAT, NYLON 1
4960 WASHER, 4.BA, FLAT, BRASS 2
5049A FEED NOZZLE, BROWN + 'O' RING (5151) 1
5075 KNUCKLE JOINT 1
5076A ATOMISER DISC ASSEMBLY 1
5151 'O' RING, BS 011, VITON 1
5316 'O' RING, 38 X 1.5, NITRILE 70 1
5317 'O' RING, BS 110, VITON 1
5363 SPRING, BATTERY CASE 1
5375 CENTRE CONNECTOR 1
5376 BATTERY CASE END CAP 1
5391 SWITCH 1
5391A SWITCH C/W SWITCH SCREW, BRASS (5397) 1
5392A SWITCH END PIECE ASSEMBLY 1
5397 SWITCH SCREW, BRASS 1
5399 SCREW, NO. 6 X 3/8" S/T POZI PAN/HEAD B 7
5401 RIVET, 1/4" DIA. X 1", RD/HEAD, BRASS 1
5402 WASHER, 1/4", STARLOCK, S/S 1
5447 BATTERY CASE 1
5451 RETAINING STRAP 1
5486B MOTOR, 2,800 RPM, WITH DRIVE SHAFT 1
5487 MOTOR SPACER 1
5776A TAP 1
5778 HOSE CONNECTOR, 6MM 1
5779 UNION NUT 1
5780 VALVE CLAMP 1
5784 EXTENSION TUBE 1
5956 SCREW, M5 X 12, POZI, PAN, PT 1
6029 CLIP, HOSE, 11.9MM, SELF TIGHTENING 1
6180 LABEL, HERBIFLEX 1
ACCESSORIES (not shown)
5137A MEASURING CUP, 50ML + CAP 1
5264 CALCULATOR, HERBAFLEX 1

16
HERBIFLEX-4 EXTRA
Press lever down (1) for treating small
areas. Press down and forward (2) for
continuous spraying. To stop flow, pull
back lever and release.
N.B. for safety, the valve can be locked in
the off position by pushing the lever
forward (3).
PART
NO. DESCRIPTION QTY
3374 /40 TUBE, (NYLON) 3/16" O.D. 1
3456 SCREW, NO. 6 X 1/4 " S/T (B) 2
3691 NUT, 6MM 1
4309/19 TUBE, (PVC) 3/16" I.D. - 0.19M 1
4309/102 TUBE, (PVC) 3/16" I.D. - 1.02M 1
4940 BOTTLE SECURING CAP 1
5037 FILTER GAUZE 1
5063 DEFLECTOR, AIR BLEED 1
5087 BACKPACK CONNECTOR 1
5088 VALVE/HOSE CONNECTOR 1
5111 'O' RING (BS 215) - NITRILE 70 1
5148 'O' RING ( BS 125) - VITON 1
5456 HANDLE BRACKET 1
5457 NUT, UNION 1
5458 VALVE/HANDLE ADAPTOR 1
5463 PIN, BRASS, 1MM X 10MM 1
5467 VALVE, TRIGGER 1
PART
NO. DESCRIPTION QTY
5477 CABLE TIE 1
5478 'O' RING (BS 108) 1
5479 GRIP, PVC 1
5481 SCREW, M6 X 25 POSI PAN 1
5482 BOTTLE HOLDER 1
5483 HANDLE, ALUMINIUM 1
ACCESSORIES (not shown)
BOTTLE, PET, 1 LITRE 1
OPTIONAL EXTRAS
4390 BOTTLE, 2 1/2 LITRE + CAP
When using the backpack
connector the airbleed
tube must be fitted as
shown
5
If the spray head is horizontal the spray
should project forward about 0.6 m and
produce a pattern or band around 0.5 m
wide using the standard atomiser cone
housing (A 90).
If the head is angled downwards the
band width will be reduced. The an-
gle of the spray head should not ex-
ceed 45° otherwise dripping will re-
sult.
Changing the angle of the spray head
will adjust the band width produced.
To change the angle of the spray head
slacken the vertical adjustment nut (1),
alter the angle of the head (2), re-
tighten the nut and check the new
band width produced.
The head of the HERBIFLEX-4 can
also be turned sideways in order to
spray narrow lines or adjust the place-
ment of the spray pattern produced.
To do this slacken the horizontal ad-
justment nut (3), rotate the head (4)
and re-tighten to lock the position.

6
MIXING, FILLING AND CALIBRATION
Mixing and filling is generally the most hazardous process in the spraying operation.
Always follow the label instructions. Always use a filter (fitted in the Micron Mi-
cropak backpacks) and use a funnel if filling a container with a small neck. Only
mix enough spray for the area to be treated thereby avoiding the need for disposal of
unused spray mix.
Always wear gloves when handling
agrochemicals and equipment. Always use the correct equipment when mixing and measuring.
Always wash off any skin
contamination Always clean all equipment after
use.
With the HERBIFLEX-4 herbicides are usually applied in around 20 litres total spray
volume per hectare. The exception is glyphosate which can be applied at volumes as
low as 10 litres per hectare. These are lower volumes than recommended for high
volume application with knapsack sprayers. Use the minimum dose rate recom-
mended on the label for the intended treatment and add water to make up to the vol-
ume required for application with the HERBIFLEX-4.
15
TROUBLESHOOTING
A) Atomiser disc spins but does not spray or sprays irregularly. Check:
- the feed nozzle. If the feed nozzle is blocked remove and soak in soapy
water.
Never blow through the nozzle with your mouth.
- that the feed nozzle gives a flow rate within the operating range
- the atomiser disc is clean and undamaged. Clean or replace.
- the flow valve for blockage. Clean if necessary.
B) Atomiser disc fails to spin or spins unevenly. Check:
- that the batteries are fitted correctly.
- the condition of the batteries. Replace if necessary.
- that electrical terminals and contact points are clean and that electrical wires
are not broken or corroded.
- the motor for corrosion or obvious signs of wear. Replace if necessary.
- the atomiser disc and atomiser cone housing are fitted correctly (see 'AFTER
SPRAYING - TO REFIT THE ATOMISER DISC').
N.B. Battery condition can be checked with a torch (or a torch light bulb and
electrical wire).
C) Spray liquid spills from the atomiser cone during spraying:
- angle of the spray head to the ground is too great - reduce the angle.
- flow rate too high - fit feed nozzle with lower flow rate and reduce walking
speed accordingly.

14
STORAGE
Before storing the HERBIFLEX-4 for long periods disassemble the sprayer by re-
moving the four screws in the battery case and clean all electrical contacts with a wire
brush or similar. Reassemble and with the sprayer in the collapsed position i.e. bat-
teries removed, store in a dry place away from direct sunlight. Batteries should be
stored in a dry place away from direct sunlight.
OPTIONAL EXTRAS
Spray shield
In some instances where it is essential to
minimise any spray drift a spray shield can
be used. This should only be used with the
standard atomiser cone housing A90.
To fit the spray shield, remove the head adjustment wingnut and screw. Slip the
shield over the spray head so that it sits around the top of the motor housing. Fit the
screw, washers and wingnut provided with the spray shield to secure it and set the
angle of the spray head.
Atomiser cone B120 (for wider swaths)
If wider swaths (up to 75 cm) are needed an atomiser cone housing with a wider
opening (B120) should be used. This is supplied with a set of feed nozzles (yellow,
orange and red) which give the higher flow rates needed for treating using wider
swaths. (see 'MIXING, FILLING AND CALIBRATION').
This should be fitted as described in 'AFTER SPRAYING - TO REFIT THE AT-
OMISER DISC.'
remove batteries clean switch
contacts
check spring
7
For example, if the label recommends applying a minimum of 2 litres of product
made up to 200 litres of water per hectare with a knapsack sprayer, use 2 litres of
product made up to 20 litres for application with the HERBIFLEX-4, i.e. a spray mix
concentration of 10%.
Do not use herbicide concentrations greater than the maximum recommended on the
label (unless specific training or recommendations have been given) if the label:
a) specifically prohibits use of 'Reduced Volumes' i.e. increased concentrations;
b) has a statutory requirement for use of personal protective equipment when
using the diluted product at high volumes (N.B. this will appear in the
statutory box on the label); or
c) carries one of the following hazard ratings: 'very toxic', 'toxic' or 'corrosive' or
carries the warning 'risk of serious damage to the eyes' e.g. paraquat
(Gramoxone) which is classified as toxic should not therefore be used through
the HERBIFLEX-4 at concentrations greater than recommended on the label.
Micron do not generally recommend using spray mixes more than ten times the
maximum concentration recommended for high volume application with knapsack
sprayers. The safest product and lowest dose rate appropriate for the treatment
should be used at all times.
To prepare the spray mix first read the product label to determine the quantity of
product to be applied per hectare e.g. 2 litres of glyphosate per hectare. Then
determine the total spray volume to be applied per hectare with the Herbi-4 i.e. 10 or
20 litres per hectare. Calculate the ratio of product in water e.g. 2 litres glyphosate +
8 litres water = 10 litre mix = 1: 4. Use this ratio to prepare the correct dose for the
spray tank or bottle e.g. with a 5 litre backpack mix 1 litre glyphosate with 4 litre of
water.
Half fill the tank with clean water and
check for leaks Measure out the exact amount of prod- uct and add to the tank

8
Never use leaking equipment. Take care to avoid spillage when filling or lifting the
tank.
Examples of mixing spray - for 1 hectare
Fill the tank with water Wipe the tank with a dry cloth.
Mix well by gently shaking the tank. Place the tank on the operator's back.
a) glyphosate (360 g/l): 2 litres
add water: +8 litres
Total volume: 10 litres
i.e. 1 part glyphosate : 4 parts water
e.g. 1 litre of glyphosate + 4 litres of
water in 5 litre tank.
b) 2,4-D (500 g/l): 3 litres
add water: +17 litres
Total volume: 20 litres
i.e. 3 parts 2,4-D : 17 parts water
e.g. 750 ml 2,4-D + 4.25 litres in wa-
ter in 5 litre tank
Never use leaking equipment. Take care to avoid spillage of the spray mix.
13
TO REFIT THE ATOMISER DISC
When refitting the atomiser disc it is important to ensure that it is correctly located in
the atomiser cone housing and motor housing to avoid damage.
First, lower the atomiser disc into the at-
omiser cone housing ensuring that the
disc shaft seats on the ball in the bottom
of the atomiser cone assembly.
Then fit the motor housing, taking care
to ensure that the motor drive shaft is
correctly inserted into the slot on the top
of the atomiser disc. Push the screws
into the bayonet keyhole slots in the mo-
tor housing and twist to lock the assem-
bly together.
Check that the atomiser disc is correctly fitted by shaking the spray head. If the disc
can be heard rattling this means that it is fitted correctly and will spin freely.
Refit the feed nozzle, ensuring that the sealing o-ring is in place and in good condi-
tion.
4. After working with agrochemicals, or handling spraying equipment, always thor-
oughly wash hands and exposed skin. All protective clothing should be washed sepa-
rately from other clothing and stored. Contaminated gloves should be washed inside
and out.
bayonet
keyhole
slot
motor
shaft
screw
atomiser cone
housing
atomiser
disc

12
AFTER SPRAYING
1. Dispose of any surplus spray mix ac-
cording to the product approval. Store
products safely, locked up and out of the
reach of children.
2. It is essential to clean the sprayer and
bottle or backpack thoroughly using water
and detergent after use. Never immerse
the spray head in water or under a tap,
since this will destroy the electric motor.
A water and detergent mix should be put in the bottle, swilled around, and then
sprayed out onto the treated area or an area of waste ground. The sprayer and bottle
should be wiped down externally using a cloth.
3. Periodically remove the atomiser cone housing and remove and clean the atomiser
disc.
To do this first remove the feed nozzle by
pulling it out of the bottom of the atomiser
cone housing (1). Then remove the atomiser
cone housing by rotating it an eighth of a
turn clockwise (as viewed from above) to
unlock the bayonet keyhole fitting (2) and
pull it away from the bottom of the motor
housing (3).
The atomiser disc can be removed from the
atomiser cone housing and cleaned in soapy
water using a soft brush.
9
CALIBRATION
The formula below gives the relationship between swath (i.e. band) width, flow rate,
walking speed and total spray volume:
Flow rate (ml/min) = 6 x total spray volume (l/ha) x walking speed (m/s) x band width (m)
To help calibrate the HERBIFLEX-4 a calculator disc is provided with the sprayer.
This is used as below:
1. Decide the total spray volume application rate to be used. A CDA rate may be in-
dicated on the label of the product. If not, as a general guide, use 10 l/ha (total spray
volume) for glyphosate and 20 l/ha (total spray volume) for other herbicides.
2. Decide the swath (band) width you
wish to use (e.g. 30 cm) and set the angle
of the head accordingly (see 'BEFORE
SPRAYING FOR THE FIRST TIME').
3. On the calculator disc align the swath
(band) width (in cm) with the total vol-
ume application rate (e.g. 20 l/ha) as de-
termined in 1. above.
4. Having fixed the swath (band) width
and volume application rate select the
preferred walking speed (2km/hr = Slow,
3km/hr = Medium, 4 km/hr = Fast) N.B.
1 m/s = 3.6 km/hr.
5. Read off the feed rate required to give
the correct volume application rate. (e.g.
30 ml/min with 30 cm swath (band)
width and walking speed of 3 km/hr to
apply at a volume of 20 l/ha).
Unless using the atomiser cone housing B120 for wider swaths (see 'OPTIONAL
EXTRAS') the flow rate used should not exceed 45 ml/min

10
6. Fit the feed nozzle which is likely to give this feed rate using the table below as a
guide:
(* Supplied for use with the atomiser cone housing B120 only - do not use with the
atomiser cone housing A90 as this will result in flooding of the cone.)
7. Measure the flow rate which this feed nozzle gives using the actual spray liquid to
be used.
The actual flow rate should be checked holding
the HERBIFLEX-4 in the spraying position
(see 'TO START SPRAYING'). Remove the
feed nozzle from the atomiser cone housing
and allow the liquid to flow into a suitable con-
tainer (such as the 50 ml measuring cup pro-
vided with the sprayer).
If the sprayer is new it may be noticed that with the white or brown feed nozzle fitted,
air trapped in the liquid feed tube reduces the flow rate. If this occurs, clear the air
by gently tapping the tube and, if necessary, flushing it through with a strong soap
solution to reduce the surface tension in it. Once a steady flow is established measure
the volume dispensed in one minute. If necessary fit a different feed nozzle and re-
measure the flow rate.
Read off from the calculator the actual walking speed which is needed to apply the
given volume application rate with the flow rate measured. It is preferable to walk
more slowly to achieve the required spray volume than to use higher flow rates.
e.g. Volume Application
Rate (l/ha) Band Width (cm) Flow Rate (ml/min) Nozzle Walking Speed
(km/hr)
Glyphosate 10 45 30 White 4
Other herbicides 20 45 45 Brown 3
20 45 30 White 2
Increased Flow rate
Feed nozzle White Brown Blue Yellow* Orange* Red*
Flow rate Thin liquids 30 45 60* Do not use Do not use Do not use
Thick liquids 10-15 15-25 25-35 35-45 45-55* 55+* (ml/min)
11
TO START SPRAYING
Before spraying for the first time check the operation of the sprayer using water and a
little detergent only. (see 'BEFORE SPRAYING FOR THE FIRST TIME').
Check the wind speed and direction (below 5 kph is safest). Take special care to
avoid drift by keeping the spray head as low as possible. Never spray into the wind
and avoid walking into the spray.
Hold the spray head 5-7 cm above
the ground or weed foliage at an an-
gle of 35oto 40oto the ground.
Switch on the sprayer and listen to
check that the atomiser disc starts
spinning; then open the flow valve.
There may be a slight delay before
spray is emitted while liquid flows
down the tube to the feed nozzle.
Start walking immediately the spray
liquid is emitted. N.B. the machine
will not spray if the spray head is
above the level of liquid in the con-
tainer. It is best to hold the HERBI-
FLEX-4 slightly to one side so as to
avoid walking over the treated area.
Always keep the spray head away
from the body to avoid direct con-
tamination by the spray.
TO STOP SPRAYING
Close the flow valve and wait for a few moments until the spray liquid in the bottom
of the atomiser cone is sprayed out and then switch off the sprayer. When the atom-
iser disc has stopped spinning lift the spray head so that it is above the level of liquid
in the tank and the sprayer is at an angle of 45oand then open the flow control valve
to drain any remaining liquid in the feed tube back into the tank. Do not raise the
spray head until the atomiser disc has stopped spinning. Then close the flow valve.
This isolates the liquid in the backpack and means it can be disconnected from the
sprayer.