Krautzberger HS 25 Series User manual

HS-25, HS-25 HV1, HS-25 HV3
Original operating instructions
T-Dok-009-GB-Rev.0
GB hand held spray gun HS-25
Operating instructions

[email protected], www.krautzberger.com GB–2
Thank you for selecting a Krautzberger product.
This product has been manufactured according to the latest manufacturing procedures and with
extensive quality assurance measures. We promise you a product of the highest quality
If you have questions, desires or suggestions, please contact us; we are always glad to assist you.
Information about the topic of Ex protection
Many of our competitors have been identifying their products with the Ex symbol for a while now.
Krautzberger does not do this.
We construct and manufacture our products according the currently-valid guidelines.
The required analysis of ignition sources as well as previous experience with the assessment of
the applicability of the products in the Ex area showed that the product described in these
operating instructions provides no potential source of ignition with the exception of the electrostatic
charge.
Taking into account the potential equalisation (due to proper earthing), use in the Ex area is admis-
sible according to the currently-valid guidelines.

Table of contents
1 Safety................................................................................................................................... 4
1.1 DESIGNATED USE..................................................................................................... 5
1.2 Personnel requirements............................................................................................... 5
1.3 Personal protective equipment.................................................................................... 5
1.4 Disposal....................................................................................................................... 5
2 Technical data..................................................................................................................... 6
3 Structure and function....................................................................................................... 7
3.1 Overview...................................................................................................................... 7
3.2 FUNCTIONAL DESCRIPTION.................................................................................... 7
3.3 Special equipment....................................................................................................... 8
4 Operation............................................................................................................................. 9
4.1 Connecting the hand held spray gun........................................................................... 9
4.2 Commissioning.......................................................................................................... 10
4.3 Adjusting the spray pattern........................................................................................ 10
4.4 Interrupting operation................................................................................................. 11
5 Maintenance...................................................................................................................... 12
5.1 Maintenance schedule............................................................................................... 12
5.2 Maintenance work...................................................................................................... 12
6 Faults................................................................................................................................. 21
7 Spare parts/accessories.................................................................................................. 23
7.1 Spare parts................................................................................................................ 23
7.2 Accessories............................................................................................................... 25
8 EU declaration of conformity.......................................................................................... 27
hand held spray gun HS-25 ENGLISH
HS-25, HS-25 HV1, HS-25 HV3 GB–3

1 Safety
Safety instructions
DANGER!
This combination of symbol and signal word indicates an immediately dangerous situation
which causes death or severe injuries if it is not avoided.
WARNING!
This combination of symbol and signal word indicates a possibly dangerous situation which
can cause death or severe injuries if it is not avoided.
CAUTION!
This combination of symbol and signal word indicates a possibly dangerous situation which
can cause slight injuries if it is not avoided.
NOTICE!
This combination of symbol and signal word indicates a possibly dangerous situation which
can cause property and environmental damage if it is not avoided.
This symbol highlights useful tips and recommendations as well as information for efficient
and fault-free operation.
Symbol Explanation
Indicates step-by-step instructions.
ðIndicates a condition or an automatic sequence as the result of an action.
Indicates references to sections of these instructions and other applicable
documents.
Indicates enumerations and list entries without a specified sequence.
Operating instructions T-Dok-009-GB-Rev.0
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1.1 DESIGNATED USE
The hand held spray gun manually coats surfaces with liquid and low-viscosity spray fluids. Typ-
ical spray fluids are paints, colours, adhesives, glazes, enamels, release agents, etc.
Designated use also includes observance of all details in these instructions.
Any use beyond the designated use or any other use counts as misuse.
WARNING!
Danger due to misuse!
Misuse of the hand held spray gun can cause dangerous situations.
–Always observe the valid safety, accident prevention, occupational safety and environ-
mental protection regulations valid for the area of application of the hand held spray gun.
–Only use sharply abrasive, chemically-aggressive, very hot or very cold spray fluids in
consultation with Krautzberger GmbH.
–Only use the manufacturer's original spare parts.
–Only operate the hand held spray gun while adhering the values specified in the
Ä Chapter 2 „Technical data“ on page 6.
–Heed the spray fluid manufacturer's safety datasheets.
Claims of any type due to damage based on misuse are excluded.
1.2 Personnel requirements
Ensure the use of the device by skilled employees! Only skilled employees can independently
detect and avoid possible dangers during use based on their professional training, experience and
knowledge of the relevant regulations.
1.3 Personal protective equipment
When using the hand held spray gun, always wear breathing, eye and ear protection!
Only wear approved protective gloves during cleaning work with solvents!
1.4 Disposal
When the useful life of the device has been exhausted, dispose of it in commercial waste. In order
to prevent damage to the environment, dispose of any remains of spray fluid properly separately
from the device.
hand held spray gun HS-25 ENGLISH
HS-25, HS-25 HV1, HS-25 HV3 GB–5

2 Technical data
Fig. 1: Dimensions
Data Value Unit
Weight (without fluid container) 0,57 kg
Working pressure spray fluid max. 6 bar
Working pressure spray fluid (HV1 and HV3) max. 4 bar
Working pressure atomisation air max. 12 bar
Working atomisation air (HV1 and HV3) max. 4 bar
Spray fluid temperature max. 43 °C
Air temperature max. 43 °C
Fluid connection* W 17.5 x 19 AG
Suction connection* Hose NW 8/9
Atomisation air connection* Nozzle NW 8/9 or
G1/4 AG
Continuous sound pressure level (depends on nozzle) 73 to 96 dB(A)
Transfer efficiency (AWG) 87 %
* The details correspond to the standard model and can vary depending on configuration.
Operating instructions T-Dok-009-GB-Rev.0
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3 Structure and function
3.1 Overview
Fig. 2: Overview
1 Air nozzle
2 Fluid connection, flow
3 Main element
4 air regulator
5 Connector with needle stroke adjusting
screw
6 Jet regulator
7 Clamping nut
8 Draw-off lever, short
9 plastic grip
10 Hose nozzle, compressed air connection
11 Fluid connection, suction
12 Draw-off lever, long
3.2 FUNCTIONAL DESCRIPTION
Hand held spray guns are used for the
ncoating/marking of surfaces
ndosing of liquids
ndetermination of adhesive or marking points
The fluid medium is fed into the hand held spray gun via
npumps, pressure or pressure-drop containers
nscrewed-on fluid or suction container
hand held spray gun HS-25 ENGLISH
HS-25, HS-25 HV1, HS-25 HV3 GB–7

If small quantities of a fluid are processed, the use of fluid or suction containers is recom-
mended. Suction containers should only be used with low-viscosity fluids. For suction opera-
tion, the air consumption of the hand held spray gun is higher since the fluid is conveyed
against the force of gravity.
The hand held spray gun HS-25 can, depending on the customer configuration, be fitted with the
HV1 or HV3 nozzle system. Both systems are HVLP systems (hvlp = high volume, low pressure)
for low-fog coating
The spray fluid is atomised using compressed air. The geometry of the spray jet and the sprayed
quantity of the spray fluid can be adjusted with the following measures:
nSelection of the air and fluid nozzle
nChanging the atomisation air pressure on the external regulator
nChanging of the spray fluid pressure
nAdjustment of the needle stroke on the regulator of the hand held spray gun
nAdjustment of the flat jet regulator on the hand held spray gun.
3.3 Special equipment
Some special equipment and accessories are available for the hand held spray gun HS-25. See
also Ä Chapter 7 „Spare parts/accessories“ on page 23.
Operating instructions T-Dok-009-GB-Rev.0
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4 Operation
WARNING!
Danger of injury due to improper mounting and commissioning/operation!
–Only carry out the mounting and commissioning according to the steps described in
these operating instructions.
–Never direct the compressed air towards people.
–Check the fluid and compressed air hose lines before each use for damage and tight fit.
–Make sure that the hose lines used fulfil the requirements with respect to pressure,
chemical and mechanical loads.
–Make sure that the connected compressed air is oil-free and free of solid matter.
–Observe the details of the spray fluid manufacturer on the safety datasheet.
4.1 Connecting the hand held spray gun
Fig. 3: Connections
1. Connect the compressed air line to the hose nozzle (Fig. 3/3).
2. Establish the fluid supply at the fluid connection (Fig. 3/1 or 2).
hand held spray gun HS-25 ENGLISH
HS-25, HS-25 HV1, HS-25 HV3 GB–9

4.2 Commissioning
Observe the operating instructions for the components in question.
1. Switch on the compressed air supply.
2. Where applicable, switch on pump or pressure container for spray fluid.
3. Point hand held spray gun at a test surface.
Fig. 4: Draw-off lever
4. Begin spraying process by pulling the draw-off lever (Fig. 4/1).
5. Adjust the spray pattern (
Ä Chapter 4.3 „Adjusting the spray pattern“ on page 10).
6. End spraying process by releasing the draw-off lever (Fig. 4/1).
4.3 Adjusting the spray pattern
There are four different nozzle types:
Nozzle type Description Remark
Round jet cone-shaped stream in front of the
nozzle
Flat jet width-adjustable jet for flat-shaped
application
with closed flat jet regulator, a round
jet arises
Rotary jet
Full-cone rotary jet
due to rotary impulse strongly-dis-
torted spray stream
suitable for difficult workpiece geo-
metries (angles, etc.)
Operating instructions T-Dok-009-GB-Rev.0
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Possibilities for spray pattern adjustment
Fig. 5: Adjusting the spray pattern
The spray pattern can be influenced as follows:
nAdjust atomisation air pressure via pressure reducer or air regulator (Fig. 5/2).
nAdjust fluid pressure with supply by pumps or pressure container.
nAdjust needle stroke with adjustment screw (Fig. 5/3).
nAdjust width of the spray stream with jet regulator (Fig. 5/1).
nSelection of the nozzle size.
4.4 Interrupting operation
1. Terminate spraying process by releasing the draw-off lever.
2. Interrupt the feed of spray fluid. For this, empty the fluid container, unscrew the suction con-
tainer or switch off the pump or pressure container.
3. If necessary, clean the hand held spray gun (
Ä Chapter 5.2.1 „Clean hand held spray
gun“ on page 12).
hand held spray gun HS-25 ENGLISH
HS-25, HS-25 HV1, HS-25 HV3 GB–11

5 Maintenance
5.1 Maintenance schedule
The following sections describe the maintenance work that is required for optimal and fault-free
operation of the device.
Check wearing parts such as seals, nozzles and needles at regular intervals. The level of wear
depends on the abrasiveness of the spray fluid used. Escaping air and spray fluid as well as the
deterioration of the spray pattern are signs that parts are worn. In case of questions about mainte-
nance work and intervals, contact the manufacturer; see contact data on the last page.
Interval Maintenance work Personnel
After each use Clean hand held spray gun (
Ä Chapter 5.2.1 „Clean
hand held spray gun“ on page 12)
Qualified personnel
When required Change fluid and air nozzle (
Ä Chapter 5.2.2 „Changing
the air and fluid nozzles“ on page 14)
Qualified personnel
Change fluid needle ( Ä Chapter 5.2.3 „Changing the
fluid needle“ on page 15)
Qualified personnel
Tighten needle seals ( Ä Chapter 5.2.4 „Changing
seals“ on page 17)
Qualified personnel
Change needle seals ( Ä Chapter 5.2.4 „Changing
seals“ on page 17)
Qualified personnel
5.2 Maintenance work
Clean the device before all maintenance work ( Ä Chapter 5.2.1 „Clean hand held spray
gun“ on page 12).
5.2.1 Clean hand held spray gun
WARNING!
Danger of injury due to improper cleaning!
–Observe the safety datasheets of the detergent manufacturer.
–Do not immerse the hand held spray gun entirely in detergent.
Operating instructions T-Dok-009-GB-Rev.0
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1. Interrupt operation (
Ä Chapter 4.4 „Interrupting operation“ on page 11).
2. If necessary, secure pump or pressure container for the fluid against switching on again.
Fig. 6: Connecting detergents
3. Interrupt the external fluid supply.
4. Connect a container with detergent to the fluid connection (Fig. 6/1 or 2) or fill container
with detergent fluid.
5. Switch on the compressed air supply.
6. Where applicable, switch on pump or pressure container for spray fluid.
7. Begin spraying process by pulling the draw-off lever (Fig. 6/3).
8. Spray until the detergent runs clear.
9. End spraying process by releasing the draw-off lever (Fig. 6/3).
10. End the feed of detergent.
11. Blow out the detergent remains by pulling up the draw-off lever (Fig. 6/3) briefly.
12. Switch off the compressed air supply and secure it against being switched on again.
13. Clean the outside of the device with a cloth dipped in detergent.
hand held spray gun HS-25 ENGLISH
HS-25, HS-25 HV1, HS-25 HV3 GB–13

5.2.2 Changing the air and fluid nozzles
Removing the nozzles
Fig. 7: Removing the nozzles
1. Loosen the knurled nut (Fig. 71)
2. Remove the air nozzle (Fig. 7/2).
3. Activate and hold the draw-off lever (Fig. 7/5).
4. Unscrew fluid nozzle (Fig. 7/3).
Always change the fluid nozzle (Fig. 7/3) and fluid needle (Fig. 7/4) at the same time
( Ä Chapter 5.2.3 „Changing the fluid needle“ on page 15).
Attaching the nozzles
1. Activate and hold the draw-off lever (Fig. 7/5).
2. Tighten the fluid nozzle (Fig. 7/3).
3. Release the draw-off lever (Fig. 7/5).
4. Attach the air nozzle (Fig. 7/2) and tighten it with the knurled nut (Fig. 7/1).
Operating instructions T-Dok-009-GB-Rev.0
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5.2.3 Changing the fluid needle
Removing the fluid needle
Fig. 8: Needle reinforcing
1. For nozzle sizes starting with size 3.0, the strengthened needle must be unscrewed first. To
do this, remove the fluid and air nozzles ( Ä „Removing the nozzles“ on page 14) and then
unscrew the strengthened needle (Fig. 8/1) from the fluid needle (Fig. 8/2).
Fig. 9: Removing the fluid needle
2.
WARNING!
The closing piece (Fig. 9/2) is under spring force!
Carefully unscrew the closing piece (Fig. 9/2).
3. Remove the spring (Fig. 9/3) and fluid needle (Fig. 9/4).
hand held spray gun HS-25 ENGLISH
HS-25, HS-25 HV1, HS-25 HV3 GB–15

Attaching the fluid needle
Fig. 10: Attaching the fluid needle
1. Remove the fluid needle (Fig. 10/4) and spring (Fig. 10/3).
2. Screw on the closing piece (Fig. 10/2).
Fig. 11: Needle reinforcing
3. For nozzle sizes starting with size 3.0, the strengthened needle must be screwed on first.
To do this, screw the strengthened needle (Fig. 11/1) onto the fluid needle (Fig. 11/2) and
re-mount the nozzles ( Ä „Attaching the nozzles“ on page 14).
Operating instructions T-Dok-009-GB-Rev.0
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5.2.4 Changing seals
Removing seals on the closing piece
Fig. 12: Closing piece
1. Remove the closing piece (Fig. 12/3).
2. Loosen the screw (Fig. 121).
3. Remove the closing piece (Fig. 12/3) with the seals (Fig. 12/2) from the needle stroke
adjustment screw (Fig. 12/4).
4. Slide the closing piece (Fig. 12/3) onto the needle stroke adjustment screw (Fig. 12/4).
Installing seals on the closing piece
5. Slide the new seals (Fig. 12/2) onto the needle stroke adjustment screw (Fig. 12/4).
6. Screw on the closing piece (Fig. 12/3) and needle stroke adjustment screw (Fig. 12/4) with
the screw (Fig. 12/1).
7. Screw on the closing piece (Fig. 12/3).
hand held spray gun HS-25 ENGLISH
HS-25, HS-25 HV1, HS-25 HV3 GB–17

Removing seals on the main element
Fig. 13: Draw-off lever
1. Loosen the lever screw (Fig. 131).
2. Remove the trigger shaft (Fig. 13/2) and draw-off lever (Fig. 13/3).
3. Removing the fluid needle (
Ä Chapter 5.2.3 „Changing the fluid needle“ on page 15).
Fig. 14: Seal nut/screw
4. Remove the attachment (Fig. 14/2).
5. Unscrew the seal nut (Fig. 14/1) and seal screw (Fig. 14/3).
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Fig. 15: Cone seals
6. Remove the cone seals (Fig. 15/1 and 2).
Installing seals on the main element
Fig. 16: Cone seals
7. Insert the cone seals (Fig. 16/1 and 2).
Fig. 17: Seal nut/screw
hand held spray gun HS-25 ENGLISH
HS-25, HS-25 HV1, HS-25 HV3 GB–19

8. Unscrew the seal screw (Fig. 17/3) and seal nut (Fig. 17/1) by 2 thread turns.
Fig. 18: Draw-off lever
9. Replace the draw-off lever (Fig. 18/3) and tighten with the trigger shaft (Fig. 18/2) and the
lever screw (Fig. 18/1).
10. Attach the fluid needle (
Ä „Attaching the fluid needle“ on page 16).
Fig. 19: Seal nut/screw
11. Tighten the seal nut (Fig. 19/1) and seal screw (Fig. 19/2). The valve shaft and fluid needle
must move easily.
Operating instructions T-Dok-009-GB-Rev.0
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