enz SG 41 User manual

SG 41
SG 42
SG 43
SG 44
SG 45
Operating Manual
English
March 20
| Version 1.0
Spray guns

Preface Operating Manual
Page 2 of 36 ©2020 enz® technik ag 30.03.2020Version 1.0
Ta le of Contents
Preface .............................................................................................. 4
Purpose of the document ................................................................... 4
Safety ...................................................................................... 5
Noncompliance with the safety information and its conse uences .... 5
Target group ......................................................................................... 5
User re uirements ................................................................................ 5
Explanation of general safety instructions ........................................... 6
Information provided in these operating instructions ......................... 6
Intended use ......................................................................................... 7
Safety warnings for modifications ........................................................ 8
Protective e uipment ........................................................................... 8
General safety instructions ................................................................. 10
Legal ........................................................................................... 12
Copyright ................................................................................................. 12
Exclusion of liability ................................................................................. 12
Warranty conditions ................................................................................ 12
Environment ............................................................................... 13
Disposal .................................................................................................... 13
Environmental protection ....................................................................... 13
Spray guns .................................................................................. 14
Introduction ............................................................................................. 14
Application ............................................................................................... 14
Transport and storage ............................................................................. 15
Technical data .......................................................................................... 15
Scope of supply ........................................................................................ 16
Flow table ................................................................................................ 17
Reaction forces ........................................................................................ 18

Operating Manual Preface
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Tor ues .................................................................................................... 20
Installation .................................................................................. 23
Assembly .................................................................................................. 23
Setting up the work area ......................................................................... 23
Operation ................................................................................... 24
Operating the spray guns ........................................................................ 24
Replacing nozzle inserts ........................................................................... 27
Maintenance ............................................................................... 28
Inspections ............................................................................................... 28
Replacing the repair set ........................................................................... 29
Cleaning ................................................................................................... 31
Accessories/spare parts ............................................................... 32
Shoulder support ..................................................................................... 32
Swivel joints ............................................................................................. 32
Repair sets ............................................................................................... 32
Lance heads ............................................................................................. 32
Gun nozzles .............................................................................................. 33
Index .......................................................................................... 34
Notes .......................................................................................... 35
Version
Revision
Date
Initials
1.0
Created
March 20
fkr

Preface Operating Manual
Page 4 of 36 ©2020 enz® technik ag 30.03.2020Version 1.0
Preface
Dear Valued Customer,
Thank you for the confidence and trust you've placed in us by purchasing our products.
We always appreciate any ideas for improvement and constructive suggestions. Your
feedback will help us improve the design of our product and the associated documen-
tation.
If you have any uestions or suggestions, please contact our Customer Service Depart-
ment:
enz® technik ag Phone [phone]
Schwerzbachstrasse 10 Fax [phone]
6074 Giswil, Switzerland [email protected]
www.enz.co
Person responsible for documentation:
Fabian Krasni i (Tech Support / QM Manager)
We reserve the right to modify and further enhance our products without prior notice
as a result of technological advances. Misprints reserved.
Purpose of the document
The purpose of this manual is to instruct you on how to use our product correctly,
effectively, safely, and for its intended purpose. The user will be informed about risks,
reasonably foreseeable misuse, and residual risks.
Important!
Before using your product for the first time, read this original operating
manual, follow it, and save it for later use.
Please read this operating manual thoroughly before using the cleaning tool. Make
sure that all people who work with the product know how to use it correctly.
The operating manual must be available to all operating personnel at all times. It must
be kept in an easily accessible place.
If the manual is misplaced or destroyed, a new copy can be re uested from your near-
est dealer or from the manufacturer directly.

Operating Manual Safety
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Safety
Noncompliance with the safety instructions and its
consequences
Disregarding these safety instructions may lead to accidents and severe personal
injuries, material damage, and damage to the environment.
The manufacturer cannot be held responsible for any damage resulting from noncom-
pliance with these instructions.
Target group
This manual is intended for all persons who will be involved in the assembly, start-up
and operation of high-pressure spray guns.
User requirements
All persons involved with assembly, start-up, and operation of high-pressure spray
guns must
• Be familiar with the field of cleaning work and possess the appropriate technical
knowledge.
• Be trained and instructed appropriately in the use of the product.
• Have read and understood the operating manual, in particular the section on
Safety.
If your personnel do not possess the necessary knowledge, they must be trained and
instructed on it. If necessary, the cleaning tool supplier can provide this instruction and
training.
Only the maintenance and service activities described in this manual may be
performed by users who have met the above-listed re uirements. Any additional
maintenance and service work may be performed only by ualified specialist person-
nel from the manufacturer.
Please refer to the section on MAINTENANCE.

Safety Operating Manual
Page 6 of 36 ©2020 enz® technik ag 30.03.2020Version 1.0
Explanation of general safety instructions
The general safety instructions in this chapter provide information on the potential
residual risks that are inherent in the product or may occur unexpectedly, despite its
proper use.
In order to prevent personal injuries, material damage, and damage to the environ-
ment, all personnel working with this product must comply with these safety instruc-
tions. It is mandatory for said personnel to read and to understand the information
provided in this section.
Information provided in this operating manual
DANGER
Noncompliance may lead to severe injury or even loss of life.
WARNING
Noncompliance may lead to serious injury or even loss of life and/or
cause a long-term disability.
CAUTION!
Noncompliance may lead to injuries and considerable material
damage, financial losses or contamination of the environment.
Information on the technically correct and efficient use of the product.

Operating Manual Safety
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Intended use
Due to the high pressures and temperatures, there is a danger of material damage and
a risk of injury for users and other persons. The following points must be observed to
ensure proper use of the product:
The spray gun may not be operated with abrasive material.
Do not use the device if people who are not wearing protective clothing are
in the area.
The reaction force may not exceed 150 N. With body support, a reaction force
higher than 250 N is not allowed.
The product may be operated only with correct and faultless hose connec-
tions.
The maximum pressure indicated on the nozzle may not be exceeded.
Wastewater may not be drained into bodies of water (creeks, rivers, etc.).
The product must be inspected to ensure it is in proper working order before
every start-up.
Defects must be rectified before start-up.
Use the tool only as intended. (Use only the correct wrench on nuts).
Secure the hose lines in such a way that they cannot become damaged during
operation.
Only the accessories provided and approved by enz® technik ag may be used.
In addition, read the operating manual for the pressure generator to ensure that it is
being used as intended.

Safety Operating Manual
Page 8 of 36 ©2020 enz® technik ag 30.03.2020Version 1.0
Safety warnings for modifications
The spray guns may be used only if they are in technically perfect condition, their con-
struction has not been changed, and following the instructions in this user manual in
terms of intended use, awareness of safety, and awareness of risk. Only adults who
have been instructed on how to operate high-pressure cleaners may use the guns.
The manufacturer is not liable for damage resulting from unauthorized changes to the
product.
Protective equipment
The employer must provide suitable personal protective e uipment. He or she must
ensure that it is worn by the employees during work.
In the following section, the protective e uipment prescribed by Schweizerische Un-
fallversicherung SUVA (the Swiss Accident Insurance Organization) will be described.
For more information on this, refer to the brochure:
Safe entry and working in manholes, excavation pits, and channels
Order number: 4406 .d Suva
Schweizerische Unfallversicherungsanstalt
Arbeitssicherheit
Postfach, 6002 Lucerne, Switzerland
For information
Phone [phone]
For orders
www.suva.ch/waswo
Fax [phone]
Phone [phone]
Respirators
Self-contained respiratory e uipment for spending time in dangerous
atmospheres and for use during rescue operations.
Respirators
Self-rescue respiratory e uipment (devices with compressed air tanks
or regeneration devices) for working in channels and for first aid for
injured persons.
Rescue harness
Rescue harness or protective clothing with a loop sewn into the neck.
During rescue, the rescue rope will be attached to the neck loop.
Injured persons will be lifted out using a rescue lifting device with a
self-actuating load brake.

Operating Manual Safety
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Suita le working clothing
Leak-proof working clothing protects the skin from becoming soiled
and from possible infections. Visually conspicuous working clothing
makes the employee more visible to traffic.
Appropriate footwear
Safety footwear should, in particular, have good grip and be slip-
resistant and leak-proof (e.g. rubber boots).
Gloves
Appropriate gloves will protect you from hand injuries and contact
with materials that could impair your health and from untreated
water.
Hardhat
The hardhat will protect your head from falling objects and from
bumping into fixed components and objects.
Hearing protection
If there is noise that could damage your hearing, you can wear, e.g.
earmuffs with built-in headphones and microphone.
Eye protection
Your eyes should be protected against slivers, sprayed dangerous
substances, etc.
Lighting independent of the power grid
For example, you should carry a waterproof flashlight or wear a flash-
light attached to your hardhat.

Safety Operating Manual
Page 10 of 36 ©2020 enz® technik ag 30.03.2020Version 1.0
General safety instructions
Danger! | High-pressure water jets
Defects in or improper use of the product could cause hazards due to
pressurized water spray. Ensure that the product is in perfect condi-
tion before operation. Highly concentrated water jets could cause
severe injury and could even sever limbs. Noncompliance with these
safety instructions can be fatal or could lead to severe injury.
Warning! | Falling o jects
Dust particles and other loose particles are removed from the surface
to be cleaned during high-pressure cleaning. These particles are
accelerated to high speeds by the energy of the water jet, and can
cause property damage and injuries. When conditions are unfavora-
ble, for example, when working above your head, use protective
e uipment appropriate for this task. Noncompliance with these
safety instructions can be fatal or could lead to severe injury.
Warning! | Risk of falling
You will be affected by a reaction force due to the high-pressure jet
discharged. If you are working on scaffolding, protect yourself from
falling. Falling from height can be fatal or could lead to severe injury.
Caution! | Sharp o jects
If the product is tampered with, there is a risk of hand injuries due to
sharp edges. Wear gloves during work. Pay attention to where you
grip the product. If you do not do so, this could result in cutting
injuries to your hands or other parts of your body.
Caution! | Trip hazard
Lines and other objects are to be expected on the ground in the area
around where the product is being used. Pay attention to where you
are walking. Keep the area of use tidy. Tripping and falling could cause
injuries.
CAUTION!
Wear hearing protection. The water jet hitting the material will cause
additional noise. Being exposed to noise can lead to hearing loss,
tinnitus, or physiological disorders.

Operating Manual Safety
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CAUTION!
The machines may not be used by children. Children must be watched
to ensure that they do not play with the device.
CAUTION!
This machine may not be used by persons (including children) with
impaired physical, sensory, or mental abilities or a lack of experience
and knowledge.
CAUTION!
High-pressure hoses, valves, and couplings are important for machine
safety. Only use high-pressure hoses, valves, and couplings that are
recommended by the manufacturer.
CAUTION!
Water that has flowed through the backflow preventer is not drinka-
ble.
Figure 1: Warning SN EN 60335-2-79

Legal Operating Manual
Page 12 of 36 ©2020 enz® technik ag 30.03.2020Version 1.0
Legal
Copyright
This manual shall not be duplicated partially or in its entirety without the prior written
permission of enz
®
technik ag. It shall not be photocopied, reproduced, translated, or
converted into an electronic or machine-readable format.
©2020 enz® technik ag, 6074 Giswil, Switzerland.
All rights reserved
Exclusion of lia ility
The manufacturer is not liable for damage that:
 Is caused as a result of unauthorized changes to the product.
 Is caused by not following the safety instructions.
Warranty conditions
In accordance with our sales and delivery conditions, we offer a warranty. However,
the warranty is voided if:
 The product is used under conditions that are not permitted by us.
 Replacement and accessory parts that are not original replacement or accessory
parts from enz® technik ag are used.
 If there is damage due to:
o Improper use
o Not following the operating instructions
o Unsuitable operating e uipment
o Incorrect or improper routing of the hose or pipelines
o Unauthorized changes or modifications to or conversions of the product

Operating Manual Environment
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Environment
Disposal
Legacy e uipment contains valuable recyclable materials that should be sent to a
recycling center. Therefore, please dispose of legacy e uipment at suitable collection
points.
Environmental protection
Please note that surfaces are to be cleaned only if the composition is known. Under no
circumstances may chemicals or other toxic substances be allowed to enter the envi-
ronment. Do not use excessive amounts of water. This will help preserve our natural
resources.

Spray guns Operating Manual
Page 14 of 36 ©2020 enz® technik ag 30.03.2020Version 1.0
Spray guns
Introduction
enz® spray guns are universally usable surface cleaning devices. They can be config-
ured individually to ensure the most efficient use possible. The spray guns are designed
for temperatures of up to 150 °C.
Figure 2: Overview of the spray guns
Application
The application is professional high-pressure cleaning (hot and cold water). The guns
are intended only for applying li uids. This could be water or commercially available
cleaning or disinfecting agents (li uids of Group II in accordance with 97/23/EC). The
application areas include:
 Cleaning manholes
 General surface cleaning work
 General high-pressure cleaning work
Art. no.: 18.41
Name: SG
-
41
Art. no.: 18.42
Name: SG-42
Art. no.: 18.43
Name: SG-43
Art. no.: 18.44
Name: SG-44
Art. no.: 18.45
Name: SG-45

Operating Manual Spray guns
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Transport and storage
Ensure that the spray gun is protected from soiling during transport and storage. Pro-
tect the spray gun from frost. If exposed to frost, the spray gun can become seriously
damaged, to the extent that flawless operation cannot be guaranteed.
Technical data
Article num er Total length [mm] Weight [kg] Connecting thread
[
″]
Swivel joint integrated Temperature [°C] Water jet Jet nozzles Recycled water Max. flow rate [l/min] Max. working pressure [ ar]
18.41 950 1.2 1/2 Yes 5-150 Round or flat 1 No 45 300
18.42 1180 1.8 3/8 Yes 5-150 Round and flat 2 No 36 300
18.43 1100 2.1 1/2 Yes 5-150 Round or flat 1 Yes 200 350
18.44 1070 1.9 3/8 Yes 5-150 Round or flat 1 No 30 200
18.45 780 2.3 1/2 No 5-90 Round 1 Yes 45 250
Table 1: Technical data
Article num er Total length [yd] Weight [kg] Connecting thread
[
″]
Swivel joint integrated Temperature [°C] Water jet Jet nozzles Recycled water Max. flow [US gpm] Max. working pressure [psi]
18.41 1.04 1.2 1/2 Yes 5-150 Round or flat 1 No 12 4,350
18.42 1.29 1.8 3/8 Yes 5-150 Round and flat 2 No 10 4,350
18.43 1.20 2.1 1/2 Yes 5-150 Round or flat 1 Yes 53 5,000
18.44 1.17 1.9 3/8 Yes 5-150 Round or flat 1 No 8 2,900
18.45 0.85 2.3 1/2 No 5-90 Round 1 Yes 12 3,600
Table 2: Technical data for the US

Spray guns Operating Manual
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Scope of supply
Art. no. Standard equipment Included
18.41 Ø 2.7 mm round jet
18.42 Ø 1.7 mm flat jet
Ø 1.7 mm round jet Ø 2.7 mm round jet
18.43 Ø 3.2 mm round jet Ø 4.0 mm round jet
18.44 Ø 1.3 mm round jet Ø 2.1 mm round jet
18.45 Ø 3.0 mm round jet
Table 3: Scope of supply

Operating Manual Spray guns
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Flow ta le
Pres-
sure
ar 20 40 60 80 100 120 140 160 180
psi 290 580 870 1,160 1,450 1,740 2,030 2,320 2,610
Ø [mm] Flow l/min and US gpm
1.7 8.0 11.4 13.9 16.1 18.0 19.7 21.3 22.7 24.1
2.1 3.0 3.7 4.2 4.7 5.2 5.6 6.0 6.4
2.0 11.4 16.1 19.7 22.8 25.5 27.9 30.1 32.2 34.2
3.0 4.3 5.2 6.0 6.7 7.4 8.0 8.5 9.0
2.1 12.9 18.3 22.4 25.8 28.9 31.7 34.2 36.6 38.8
3.4 4.8 5.9 6.8 7.6 8.4 9.0 9.7 10.2
2.7 20.2 28.5 34.9 40.3 45.1 49.4 53.3 57.0 60.5
5.3 7.5 9.2 10.6 11.9 13.0 14.1 15.1 16.0
2.8 22.3 31.6 38.7 44.7 49.9 54.7 59.1 63.2 67.0
5.9 8.3 10.2 11.8 13.2 14.5 15.6 16.7 17.7
3.0 25.6 36.3 44.4 51.3 57.3 62.8 67.8 72.5 76.9
6.8 9.6 11.7 13.5 15.1 16.6 17.9 19.2 20.3
3.2 29.2 41.3 50.5 58.3 65.2 71.4 77.2 82.5 87.5
7.9 11.2 13.8 15.9 17.8 19.5 21.0 22.5 23.8
4.0 45.6 64.5 78.9 91.2 101.9 111.6 120.6 128.9 136.7
12.0 17.0 20.9 24.1 26.9 29.5 31.9 34.1 36.1
Pres-
sure
ar 200 220 240 260 280 300 320 340 360
psi 2,900 3,190 3,480 3,770 4,060 4,350 4,640 4,930 5,220
Ø [mm] Flow l/min and US gpm
1.7 25.4 26.7 27.9 29.0 30.1 31.1 32.2 33.1 34.1
6.7 7.0 7.4 7.7 7.9 8.2 8.5 8.8 9.0
2.0 36.0 37.8 39.5 41.1 42.6 44.1 45.6 47.0 48.3
9.5 10.0 10.4 10.9 11.3 11.7 12.0 12.4 12.8
2.1 40.9 42.9 44.8 46.6 48.4 50.1 51.7 53.3 54.8
10.8 11.3 11.8 12.3 12.8 13.2 13.7 14.1 14.5
2.7 63.7 66.8 69.8 72.7 75.4 78.1 80.6 83.1 85.5
16.8 17.7 18.4 19.2 19.9 20.6 21.3 22.0 22.6
2.8 70.6 74.1 77.4 80.5 83.6 86.5 89.3 92.1 94.7
18.7 19.6 20.4 21.3 22.1 22.8 23.6 24.3 25.0
3.0 81.1 85.0 88.8 92.4 95.9 99.3 102.5 105.7 108.8
21.4 22.5 23.5 24.4 25.3 26.2 27.1 27.9 28.7
3.2 92.2 96.7 101.0 105.2 109.1 113.0 116.7 120.3 123.8
25.1 26.4 27.5 28.7 29.7 30.8 31.8 32.8 33.7
4.0 144.1 151.2 157.9 164.3 170.5 176.5 182.3 187.9 193.4
38.1 39.9 41.7 43.4 45.1 46.6 48.2 49.6 51.1
Table 4: Flow table

Spray guns Operating Manual
Page 18 of 36 ©2020 enz® technik ag 30.03.2020Version 1.0
Reaction forces
The water jet discharging at high pressure causes a reaction force. This can be so large
that the spray gun can no longer be held securely. EU directives re uire the use
of shoulder supports as mandatory when working with a reaction force of more
than 150 N. If the reaction force is over 250 N, then hand-operated use is no longer
permitted.
Figure 3 below shows two examples.
Figure 3: Reaction force with straight spray guns
Example 1: With a nozzle insert with Ø 1.2 mm and 200 bar working pressure, the re-
action force is less than 150 N. Here, you do not need to take any additional measures.
Example 2: With a nozzle insert with Ø 3.0 mm and 140 bar working pressure, the re-
action force is greater than 150 N. The spray gun must additionally be fitted with a
shoulder support.
Determine the working pressure in [psi] based on the flow table on
Page 17.
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8
4
0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360
ø Nozzle insert [mm]
Working pressure at the spray gun [ ar]
Reaction force [N]
Example 2
Example 1
With support
Without
support
Only with
mechanical
support

Operating Manual Spray guns
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Reaction force for spray guns SG-41, SG-43, and SG-45
Figure 4: SG-41
Figure 5: SG-43
Figure 6: SG-45
Figure 7: Reaction force with straight spray guns
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8
4
0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360
ø Nozzle insert [mm]
Working pressure at the spray gun [ ar]
Reaction force [N]
With support
Without
support
Only with
mechanical
support

Spray guns Operating Manual
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Torques
The SG-42 and SG-44 spray guns have angled lances, which generate a tor ue. In
accordance with DIN EN 60335, a maximum tor ue of 20 Nm is permissible on the
spray gun grip. The user is more limited by this tor ue than by the reaction force.
Therefore, with SG-42 and SG-44 spray guns, you must pay attention to the tor ue
table.
Figure 8: Torque calculation
Calculating the torque on the SG-42 grip
To calculate:
T = tor ue [Nm]
Given:
F = reaction force [N] = 70 N
l = length [m] = 1.05 m
sin α = sin (15°) = 0.259
   ∗ sin  ∗ 
  70  ∗ 0.259 ∗ 1.05 
  19.02 