Krautzberger HS-25/2K Guide

Operating instructions and
spare parts list
DOK-044-GB Rev. 2
Spray gun
Type HS-25/2K
Art. No. 2585-090-...
- keep for future use –

DOK-044-GB Rev. 2
- 2 -
Operating instructions for the 2-
component spray gun HS-25/2K
N.B.:
NEVER POINT SPRAY GUNS AT PEO-
PLE
SOLVENTS AND THINNING AGENTS
CAN CAUSE BURNS!
THE SPRAY GUN MUST BE DISCON-
NECTED FROM THE COMPRESSED
AIR SUPPLY BEFORE ANY REPARE
WORK IS CARRIED OUT!
IN THE WORK AREA, POTENTIAL
SOURCES OF IGNITION SUCH AS
OPEN FLAMES, NON EXPLOSION-
PROTECTED LAMPS, ELECTRIC MO-
TORS ETC. ARE STRICTLY FORBID-
DEN!
THE RELEVANT REGULATIONS ON
WORK SAFETY MUST BE OBSERVED
AT ALL TIMES!
ALWAYS ADHERE TO THE RELEVANT
ACCIDENT PREVENTION REGULA-
TIONS!
Design
The 2-component spray gun consists
of a main and an auxiliary nozzle sys-
tem and is designed for the application
of 2-component materials. The A com-
ponent is applied via the main nozzle
system and the B component via the
auxiliary nozzle system. Atomisation of
the A component in the main nozzle
system is effected in accordance with
HVLP specifications.
The material is transported to the gun
through hoses; material feed can
therefore be effected either from a
pressure feed container or with the aid
of a pump.
Startup
Unpack the spay gun and clean away
any packaging remains.
When the spray gun has been con-
nected up to the compressed air sup-
ply, activate the trigger several times to
blow air through the gun in order to
remove any foreign particles from the
air ducts.
Then connect the gun up to the mate-
rial feed system; the gun is now ready
for use.
Material feed regulation
a) Main (A component) nozzle sys-
tem
Screw the adjusting screw of the end
piece (item 13-1) into the gun until the
material needle (item 9) no longer
moves when the trigger (item 24) is
activated. The adjusting screw is then
loosened to set the needle distance
required for the desired material dis-
charge. The larger the needle travel,
the greater the material feed.
b) auxiliary (B component) nozzle
system
The activator feed can be varied using
two nozzle system sizes as well as on
the basis of material pressure.
Air regulation
The spray gun is equipped with a built-
in regulator (item 6) for fine regulation
of the air throughput directly on the
gun.

DOK-044-GB Rev. 2
- 3 -
Jet regulation
The main nozzle system of the spray
gun is fitted as standard with a flat jet
nozzle (item 3). The built-in jet regula-
tor (item 14) enables the user to vary
the output from a full flat jet to a fine
circular jet to suit the workpiece to be
processed.
Working pressure
Upstream installation of a pressure
reducer (ensure sufficient air through-
put) guarantees uniform working pres-
sure. The required pressure head de-
pends on the viscosity of the material
to be processed and must be set ac-
cordingly.
Work interruption
Before stopping for breaks, the spray
gun must be rinsed through/cleaned
using a suitable solvent. This prevents
caking of material remains and en-
sures constant availability.
Nozzle set change
Material nozzles and needles – as well
as gaskets – are wearing parts which
need to be replaced periodically.
a) Main (A component) nozzle sys-
tem
To remove the nozzle set , first un-
screw the closer section (item 13/13-1)
and pull out the entire valve axis (item
8) together with needle (item 9) and
valve spring (item 12) towards the
back.
Then loosen the sealing screw (item
11) of the valve axis and remove the
material needle together with the nee-
dle spring (item 10). Before fitting a
new material needle, you should check
whether its setting dimension. (needle
tip to needle nuts) matches the data on
the spare parts drawing. If necessary,
adjust the setting dimension and fix the
needle nuts in place using a locknut.
To change the air and material nozzle,
first loosen the nut (item 1) by hand
and remove the gasket (item 2) and
the air nozzle (item 3). The material
nozzle (item 4) can then be screwed
off. The threads off the new parts
should be lightly greased. It is impor-
tant to ensure that the material nozzle
is tightly screwed in place.
b) Auxiliary (B component) nozzle
system
To remove the material needle (item
39), first loosen and remove the needle
carrier (item 49) and the nut (item 50).
Then unscrew the screw (item 40) and
pull out the needle. Then loosen the
nut (item 38), remove the air cap (item
37) and unscrew and replace the ma-
terial nozzle (item 36). Before fitting a
new material needle, push the spring
(item 41) and the screw (item 40) onto
the threaded end of the needle; then
screw on the needle carrier (item 49)
and the nut (item 50). When the setting
dimension is correct (see spare parts
drawing), fix in place using a locknut.
Then insert the parts in the housing
(item 35) and screw in the screw (item
40). The threaded parts should be
lightly greased.
Cleaning and maintenance
When cleaning the spray gun and in
particular the air cap, never use sharp-
edged or pointed tools (wire, twist drill
or similar). Special flat/round brushes
with plastic bristles are available for
this purpose. Never immerse the whole
gun in solvent! This would destroy the
gaskets.
Proceed as described in the section
“work interruption” and rinse the gun
through using a suitable solvent. Ex-

DOK-044-GB Rev. 2
- 4 -
ternal cleaning can be effected using a
brush an solvent.
After cleaning, the moving parts of the
gun which are accessible from the out-
side should be lightly oiled.
these parts are:
the trigger axis (item 23)
the material needle (item 9) in
front of the sealing nut (item 22)
the valve axis (item 8) in front of
the sealing screw (item 19)
the carrier (item 20) on the
presser mushroom
the material needle (item 39) in
front of the screw (item 40)
the needle carrier (item 49)
Incorrect functioning
Incorrect functioning can be caused by,
among other things, the following:
The material nozzle has been insuffi-
ciently tightened. This can cause air to
enter the material duct and lead to jolt-
ing operation of the gun.
The use of impure compressed air .
Condensate and floating particles can
get into the spray gun and lead to de-
fective spray coats. This problem can
be avoided by using a a pressure re-
ducer filter.
Soiled air gap between air and material
nozzle or blocked borings in the humps
of the air cap. This leads to an uneven
material jet. These parts should there-
fore always be kept clean.

DOK-044-GB Rev. 2
- 5 -
Spare parts list
Item Art.No. Designation
01 2583-040-0075 Nut
* 02 2583-010-0401 gasket
** 03 2583-060-.... Air cap, HVLP, (main nozzle system)
** 04 2583-050-.... Material nozzle, HVLP, (main nozzle system)
05 2585-080-0605Main element
06 2500-080-0231 Air regulator
* 07 2500-010-0015 Gasket
08 2500-040-0644 Valve axis
** 09 2500-070-.... Material needle
10 2500-020-0002 Spring
11 2500-040-0651 Screw
12 2500-020-0001 Spring
13 2585-080-1758 End piece
13.1 2585-080-0306 needle stroke adjuster
14 2585-080-0485 Jet regulator
15 2585-020-0024 Spring
16 2585-040-0212 Dial disc
17 2500-040-0672 Screw
* 18 2500-010-0014 Gasket
19 2500-040-0107 Screw
20 2500-040-0652 Carrier
21 2500-010-0007 gasket, PTFE-graphite
22 2500-040-0658 Nut
23 2500-040-0538 Trigger axis
24 2585-040-2496 Trigger
25 2500-030-1373 Screw
26 2500-080-0315 Grip
27 2500-040-0654 Nut
28 2585-030-3131 Screw connector
29 2585-040-2588 Screw connector
31 2585-040-2392 Angle bracket
32 2585-030-0209 Screw
33 2585-030-2856 Washer
34 2585-030-2897 Nut
35 2585-080-0949 Housing
** 36 2585-050-.... Material nozzle
** 37 2585-060-.... Air nozzle
38 2585-040-2009 Nut
** 39 2585-070-.... Material needle
40 2585-040-2007 Screw
41 2585-020-0044 Spring
42 2585-040-2370 Screw
* 43 2585-010-0035 Gasket
* 44 2585-010-0034 Gasket
45 2585-040-2029 Screw
* 46 2585-010-0715 Gasket (2pcs.)
47 2585-030-0527 Screw
48 2585-030-1897 Washer
49 2585-070-0727 Needle carrier
50 2585-030-2913 Nut
- 2585-010-0658 Gasket set
- 7026-120-0353 Tool set
* contained in the gasket set
** available nozzle sizes: (main system/ auxiliary nozzle system): 0,8/0,3 mm; 1,2/0,5 mm; 1,2/0,8
mm; 1,5/0,5 mm

DOK-044-GB Rev. 2
- 6 -
140-0118
15.11.99
13.1
MB
MB
L
Z
MA
3941404950
35
424344363738
46
5
4321
27
28
23
24
25
26
13121110987
6
21
22
181920
14
17
29
15
16
4645
47
48
33
34
32
31
74
119

DOK-044-GB Rev. 2
- 7 -
Declaration of conformity
under the terms of the EC Directive 89/392 EEC and the amendment directives
91/368/EEC, 93/44/EEC and 93/68/EEC
Krautzberger GmbH, Stockbornstrasse 13, D-65343 Eltville
Design of unit: Spray gun
Type designation: HS-25/2K
Make: Krautzberger GmbH
Serial no.: 2585-000
The spray gun type HS-25/2K was developed, designed and produced in compliance
with the EC Directive 89/392/EEC.
The following harmonised standards were applied:
 EN 292, Safety of Machines, Plant and Equipment
 EN 1953, Spraying Equipment for Coating Substances, Safety Requirements
(German version prEN 1953: 1995)
The following documents are fully available:
 Overall diagram of the spray gun type HS-25
 Detailed and complete diagrams for the checking of compliance of the spray gun type
 HS-25 with the basic safety and health safety requirements
 A list of the basic requirements from EC Directives, standards and specifica-
tions applied during the development, design and production of the spray gun
type HS-25
 A description of the solutions to prevent hazards arising from use of the spray
gun type HS-25
 A copy of the operating instructions
___________________________
:head of design