Alfred Schutze W 3/FZ-Duo HVLP User manual

Operating Manual
for
FINE-SPRAY gun
W 3/FZ-Duo HVLP
Read thismanualcarefullybeforeinstalling, operating orservicing thisspraygun.
Keep alwayshandyforfurtheruse.

1 Introduction
The FINE-SPRAY gun W3/FZ-Duo HVLP is designed and constructed for finestapplication ofthin
materials f.i. release agents,coloursorother fluids oflowviscosity.Depending on air capthis spray
gun spraysin around- or flatspray.Spraygunsare precision tools.Alwayskeep clean and observe
minimum instructionstomaintaina long useful life of the gun.
2 Safety
2.1 Dutiesof the user
•The user must read thisoperating manual carefullybefore performing anyoperations.
•Applications and serviceoperations shouldnot be carried outif the user is not absolutelysure of
the purpose and consequence ofthe operations.
2.2 Definitive Use
The spraygun W3FZ-Duo isahigh performancespraygun;Itis suitablefor thinsprayable materials
f.i.release agents. Itis not suitable forspraying aggressive fluids,likeacids, alkaline solutions, cleaning
agents, chemicals.When you are notsure,ifyour fluidis suitablefor spraying please contactthe
manufacturer.
Warning!
Donot use anysolvents,cleaning liquids orcoating materialscontaining 1,1,1
Trichlormethane or Methylen Chloride i.e.agentsofthe group of chlorinated hydrocarbons.
These chemicalsmayreactwith aluminium,anodised or zinced parts. The chemical
reaction maybe explosive.
2.3 Warning against Danger
This operating manual warns users ofoperationswhich mayputtheir health atrisk.The warningsare
indicated bycombinations of text and symbols corresponding tothe different danger classes.
WARNING!
Signsa possibledanger situation.
If you don’tavoid, death orsevere injuries can follow.
CAUTION!
Indicatesa situation which maybe dangerous.
Failure to heed the caution mayresultinpersonal injury.This indication is alsoused where material
damage ispossible.
IMPORTANT!
Indicatestips for usage and other helpfulinformation.
3 Function Description
Your newspraygun W3/FZ-Duo HVLP has been thoroughlytested before leaving the factory.No
more adjustment is necessaryprior to setting up sprayoperation. Iffluid output,however,requires to be
regulated individually,applyneedle regulator (24.1) and counter nut(23.1) for quantityoffluid flow.To
spraywithaspraygun definitevolumeofatomising air and adefinitepressureof materials is needed.
The needle willbe opened byactivating the triggerand the material flowsout offromthe nozzle.The
air pressure atomises the material and forms itto ajet.
The needle function is: Opening bytrigger and closing byspring force.

3.1 Set upgun asfollows
•Connect Duo-hose (twinhose for atomising air and fluid) to material pressure tankor other
means of feeding fluid and to compressor.
Translucent part ofhose :for fluid(gun connection “M”)
Blue part ofhose :for atomising air (gun connection “AIR”)
•Setatomising air pressure to required spraydroplet sizes byreducing valve (notpartof the
spraygun).
•Setmaterial pressure to required material outletand spraydropletsizes bya2. reducing valve
(notpart of the spraygun).
IMPORTANT!
Fluid outputcan be regulated individually,applyneedle regulator (24.1) and counter nut
(23.1) for quantityoffluid flow.
Turning needle regulator right :lessfluid flow
Turning needle regulator left : more fluid flow
When you are sureoffluidflowopen trigger (19.1). Sprayoperation starts. You willnotice that you
receive so called “pre-air” prior to opening fluid flowwhen pulling the trigger.When releasing trigger you
still have “purging-air” after needle has closed nozzle and fluid flowwasstopped.This preventsthat
fluid formsdrop instead ofthe desired atomisation.
IMPORTANT!
After sprayoperation give a shortperiod of time “pre-air” respectively“purging-air”. This
preventsthat material blocked the nozzle.
3.2 OperatingInformation
•Depending on viscosityoffluid nozzlebores are availablein 0,2 ;0,3;0,5;0,8and 1,0mm ∅
(onlyone size ofair cap isrequired).
•Standard version of gun has flatspraypattern aircap with approx. 60°sprayangle (3.1.1).If
round sprayis required, justreplace air cap bya round sprayair cap (3.1.2).
•Flatsprayaircap can be positioned for horizontal, vertical oranyin between position ofjet. For
special air capswith other sprayangels please contactthe manufacturer.
CAUTION!
Never pointthe spraygun againstpersons.Wearing eye protecting isstrongly
recommended.Sprayingprocedures cause noises depending on the used pressure. If
necessary,wearing of ear protection is recommended.
WARNING!
Danger caused bycombustible and noxious spraying material.Safetyinstructionson fluid
can and material data of fluid manufacturer mustdefinitelybe observed.
Don´tsmokewhen spraying paintsor solvents which have combustible properties.Allelectrical
installationswithin the spraying area mustbe explosion proof.Observe working safetyregulations in
respectof protective clothing (masks, clothing, ear protection,etc.).

4 Service
4.1 Cleaning
WARNING!
Danger caused bycombustible and noxious spraying material.Safetyinstructionson fluid
can and material data of fluid manufacturer mustdefinitelybe observed.
WARNING!
Before opening the spraygun it hasto be disconnected fromthe airsupplyand fromthe
material supply. Otherwise ejected elementscan cause danger.
To clean the gun, spraysolvent untilpure solvent leaves nozzle.Do notsubmerge entire gun in solvent.
At longer working interruptions itisadvisable to clean air cap and nozzle byputting these partsonlyinto
solvent. Ifnecessary,use softbrush. Toclean small drillhoses,use our special nozzle cleaning
needles.Moving parts and threads shouldalways be greased slightly.
4.2 Changing nozzleset
Anozzle setincludes needle (1.1.1),nozzle (2.1.1) and air cap (3.1.1or 3.1.2). Ifnozzle sizeis tobe
changed,alwayschange all three parts. Change the complete setalso when onlyone ofthe partsis
defect.
•1.Remove screw(21.1)
•2.Pullout valvespring (20.1)
•3.Pullout needle/valve cartridge
•4.Unscrewthe collar ring (4.1.1),remove air cap (3.1.1 or 3.1.2)
•5.Unscrewnozzle (2.1.1)
Re-assemble in reverse order.
4.3 Dis-assembling needle/valvecartridge
•1.Remove screw(21.1)
•2.Pullout valvespring (20.1)
•3.Pullout needle/valve cartridge
•4.Unscrewvalve lock(18.1)
•5.Pullout needle spring (17.1)
•6.Pullout needle (1.1.1)
Re-assemble in reserve order. OBSERVE!!!
Needle nuts (16.1) mustbe counter-screwed in such a position where “pre-“ and “purging-air” work.
The correct position of needle nuts (16.1) on needle or extension needle is8,8 - 9,0mm fromthe end of
the needle.

5 Causeof faults
Before starting maintenance or repair work,ensure that all air operated toolsare disconnected fromthe
air supply!
•If drops form on the trigger
the needlegasket(10.1) is worn respectivelylooseand mustslightlybe retightened. For that
purpose remove needle/valve cartridge (see chapter “4.3”). Then unscrewscrew(12.2) and take
out needle driver (12.1). Using asmallscrewdriver turn stuffing box (11.1) gentlyclockwise and
tryif needleis sliding smoothlyagain within the tightening gasket.
•If drops form on the nozzle,
either needle or nozzle is worn and should be replaced.Or needleis not closed properlyf.i.
because ofparticleresidues withinnozzle. Cleaning the needle/valve cartridge withsolvent (see
chapter “4.3”).
•If there is an uneven and not steadyspray jet
make sure that nozzle is screwed in tight.Other reason could also be dirt residue withinair cap.
Cleaning aircap with solvent.
•Airblowing constantly
Although trigger released. O-Ring (13.1) and/or washer(14.1) worn and tobe exchanged.Or
needlenuts are not counter-screwed in correctposition (see chapter “4.3”).

6 Sparepartslist
draw.-no. partno. Qty. Description
1.1.1 * 1 needle, stainless steel (part no.see overleaf)
2.1.1 * 1 nozzle, SM,stainless steel(part no. see overleaf)
3.1.1 * 1 aircap, flat sprayHVLP (part no. see overleaf)
3.1.2 * 1 aircap, round spray HVLP (partno. see overleaf)
4.1.1 410028 1 collar ring
4.1.2 410014 1 protecting ring 19mm (optional)
5.1 510010 1 gun body
9.1 610036 1 screw
9.2 410013 1 cap nut
10.1 640062 1 needle gasket (PTFE)
11.1 810002 1 stuffingbox
12.1 320002 1 needle driver
12.2 610035 1 screw
13.1 640036 1 o-ring
14.1 640008 1 washer
15.1 380010 1 airvalve
16.1 410026 2 needle nut
17.1 820005 1 needle spring
18.1 610001 1 valve lock
19.1 190006 1 trigger
20.1 820024 1 valve spring
21.1 220057 1 screw
21.2 220150 1 blocked lock(optional)
23.1 410008 1 counter nut
24.1 610029 1 needle regulator
26.0 220021 2 hose socket, complete
26.2 640080 2 washer
26.3 220055 2 hose socket
26.4 410030 2 nut
27.1 500019 1 buckling guard,complete (optional)
28.1 910004 1 hook(optional)
* Part no. see page 8.
Please specifydiameter: 0,2/0,3/0,5/0,8/1,0mm Ø
7 Technical data weight :approx.240 g
max. material pressure :4 bar
max.atomising air pressure :6 bar
Specialdesigns on request. Technical alterationsreserved.State ofengineering: September 2003
8 Manufacturerdeclaration
The spraygun W 3/FZ-Duo HVLP was constructed and produced by
ALFRED SCHÜTZE Apparatebau GmbH, Hannoversche Straße 69-71, 28309 Bremen-Germany
in accordance withthe guidelinesand standardsofDIN EN 292. This spraygun can be combined with
other modules or machines,which complyto DINEN 292, withoutlimiting the conformity.
Place Date Signature of manufacturer
Bremen 12.09.2003

6.1 part no. of needles, nozzlesand aircaps
*needle *nozzle SM
draw no. part no. Description draw no. part no. Description
1.1.1 110073 needle 0,2/0,3mm 2.1.1 210070 nozzle SM0,2mm
1.1.1 110074 needle 0,5mm 2.1.1 210071 nozzle SM0,3mm
1.1.1 110075 needle 0,8mm 2.1.1 210072 nozzle SM0,5mm
1.1.1 110076 needle 1,0mm 2.1.1 210073 nozzle SM0,8mm
2.1.1 210074 nozzle SM1,0mm
* air cap / flat spray60° (standard) HVLP
draw no. part no. Description
3.1.1 310268 aircap,flatspray HVLP,0,2- 0,5mm
3.1.1 310269 aircap,flatspray HVLP,0,8- 1,0mm
* air cap / round spray15° HVLP
draw no. part no. Description
3.1.2 310270 aircap,roundsprayHVLP, 0,2 - 0,5mm
3.1.2 310271 aircap,roundsprayHVLP, 0,8 - 1,0mm