AWS ZRK User manual

Read carefully before use.
Keep for future use.
We reserve the right to make technical changes.
EN
Englisch
AWS Apparatebau Arnold GmbH
Zimmerbachstraße 51
74676 Niedernhall - Waldzimmern
FON [phone]
FAX [phone]
MAIL [email protected]
WEB www.aws-apparatebau.de
Operating instruction
Swing check valve
Product line
ZRK / ZRKF / 920 / 925.1

CONTENTS
Swing check valve
Revision date: 03/05/2022 Index number: D0-117
1PREFACE.......................................................................................................................1
1.1 General ......................................................................................................................................... 1
1.2 Target group................................................................................................................................. 1
1.2.1 Personnel qualification.............................................................................................................. 1
1.3 Applicable documents.................................................................................................................. 1
1.4 Warranty....................................................................................................................................... 1
2SAFETY INSTRUCTIONS ..............................................................................................2
2.1 Warnings....................................................................................................................................... 2
2.2 Intended use................................................................................................................................. 2
2.3 Requirements of the user............................................................................................................. 2
2.4 General safety instructions........................................................................................................... 3
3VALVE DESCRIPTION...................................................................................................5
3.1 Product lines................................................................................................................................. 6
3.2 Intended use................................................................................................................................. 7
3.3 Description of function................................................................................................................. 7
3.4 Pressure test of the valve............................................................................................................. 7
3.5 Scope of delivery .......................................................................................................................... 7
4TYPE PLATE..................................................................................................................8
4.1 Article description breakdown ..................................................................................................... 8
4.2 Type code ..................................................................................................................................... 9
5STORAGE AND TRANSPORT.....................................................................................10
6INSTALLATION............................................................................................................11
6.1 Prepare installation .................................................................................................................... 11
6.2 Installation instruction ............................................................................................................... 12
7COMMISSIONING, DECOMISSIONING, MAINTENANCE...........................................15
7.1 Commissioning ........................................................................................................................... 15
7.2 Decommissioning ....................................................................................................................... 15
7.3 Maintenance............................................................................................................................... 15
7.4 Remove pollutants...................................................................................................................... 15
7.5 Correct malfunctions and defects .............................................................................................. 16
8REMOVAL....................................................................................................................17
8.1 Prepare removal......................................................................................................................... 17
8.2 Removal instructions.................................................................................................................. 17
9STORE / REUSE THE VALVE......................................................................................17
10 DISPOSAL....................................................................................................................18
11 DECLARATION OF CONFORMITY..............................................................................18

1 PREFACE
Revision status: 03/05/2022 1 Index number: D0-117
1 PREFACE
This operating instruction supports the user in the appropriate, safe and economical use of
the following valves:
Swing check valves of the product line ZRK, ZRKF, 920 and 925.1
1.1 General
These operating instructions apply to all the above-mentioned valves. To guarantee safe and
smooth use, the entire manual must be read and understood before installation and
commissioning. These instructions are intended to assist the user during installation,
operation, maintenance and removal. In addition to the instructions in this manual, all
applicable accident prevention regulations, safety rules, country-specific or system-specific
regulations and instructions must be observed. These operating instructions are an essential
part of the valve and must be kept available by the operator at the place of use, also for a
later use.
1.2 Target group
This instruction is intended for any person who is involved in work of any kind on the valve. In
particular, the operating instructions are intended for trained and qualified personnel.
1.2.1 Personnel qualification
All work on the valve must be carried out by qualified personnel only. If the personnel do not
have the required qualifications, they have to be trained. This must be ensured by the
operator. Persons without the required knowledge and skills are not permitted to work on the
valve.
1.3 Applicable documents
This includes the corresponding data sheet and the declaration of conformity of the above
mentioned valves. If necessary, these are to be requested from the manufacturer or
downloaded from the website.
1.4 Warranty
AWS Apparatebau Arnold GmbH does not assume any warranty in case the operator or third
parties:
disregard this document.
do not use the valve properly.
should carry out interventions of any kind (conversions, modifications, etc.) on the
valve.
Malfunctions due to pollution or wear of the valve as well as wearing parts (e.g. seals) are
not covered by the warranty.

2 SAFETY INSTRUCTIONS
Revision status: 03/05/2022 2 Index number: D0-117
2 SAFETY INSTRUCTIONS
2.1 Warnings
The following warnings are used in this manual. In order to protect you from accidents,
injuries and damage to property, it is important to read and observe these warnings.
DANGER
High risk
Indicates an immediate danger. If not avoided, death or serious
injury will result.
WARNING
Medium risk
Indicates a potentially dangerous situation. If not avoided,
death or serious injury may result.
CAUTION
Low risk
Indicates a potentially dangerous situation. If it is not avoided,
minor or slight injuries may result.
NOTICE
Commandment
Indicates a potentially harmful situation. If not avoided, property
damage may result.
2.2 Intended use
AWS valves may only be used within the approved pressure and temperature limits,
considering chemical and corrosive influences. The valves are not suitable for fluids
containing solids. Intended use includes observing and following the instructions in this
manual. Modifications, conversions or any use of the valve other than the intended use are
considered to be improper use.
2.3 Requirements of the user
It is the responsibility of the planner/installer and operator to ensure that:
the valve is used as described in chapter 2.2 Intended use.
the piping system is properly installed and its proper functioning is regularly checked.
only qualified personnel are used for installation, removal and maintenance.
the valve is only professionally installed if it is in perfect condition.
the operating instruction are taken into account by the personnel.
personnel receive regular instruction in industrial safety and environmental protection
(especially for pressurized pipes).

2 SAFETY INSTRUCTIONS
Revision status: 03/05/2022 3 Index number: D0-117
2.4 General safety instructions
The same regulations apply to all valves as to pipeline systems in which they are installed.
The national and international regulations with regard to accident prevention as well as
safety regulations must be observed by the operator.
DANGER
When working on system
System must be switched off and secured against
unauthorized switch-on.
Pipeline must be pressureless to prevent uncontrolled
leakage of the medium.
Pipeline must have cooled down to approx. 20°C.
Medium must be completely removed from the valve
and pipeline.
Contaminated valve must be completely
decontaminated before work is performed.
Valves may only be installed, removed and maintained
by qualified personnel.
DANGER
When operating the system and the valve
In applications with explosion hazard, hot surfaces of
the system and valve parts can be a potential source of
ignition. This danger must be taken into account by the
operator
WARNING
When working on the system
Any remaining liquid that may leak out during removal
must be collected and disposed of.
WARNING
When operating the system and the valve
Only media may be used which do not damage the
valve and its seals (suitable material pairing).
Otherwise, this can lead to leakage and leaking of the
medium.
When using media with a very low or very high
temperature, burns can occur when touching the
system parts or the valve housing. In this case, these
may only be touched with suitable protective equipment.
This must be done under the responsibility of the
operator of the system.
Pressure surges in the system can cause severe
damage and must be avoided. This is the responsibility
of the operator of the system.

2 SAFETY INSTRUCTIONS
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CAUTION
Risk of minor injuries
Wear protective gloves during installation, removal and
maintenance to avoid injuries from cuts on sharp-edged
components.
Always secure the valve adequately during transport,
installation and removal.
NOTICE
Notice of property damage
The valve and the system can be damaged if the valve
is not installed correctly.
Do not subject the valve to pressure surges; otherwise
the valve may be damaged.

3 VALVE DESCRIPTION
Revision status: 03/05/2022 5 Index number: D0-117
Pos.
Name
1
Body
2
Disc
3
Disc retainer
4
O-ring disc
5
O-ringbody
6
Eyebolt
7
Spring1
8
Locating pin1
9
Retaining bolt1
10
Spring pin
11
Pin retainer1
3 VALVE DESCRIPTION
The illustrations are exemplary for the design of the valves. All further information can be
found in the data sheets of the relevant product line.
The following illustration describes the product line ZRKF:
1 Components only available in the product lines ZRKF and 920-with spring return.
2 Only available in soft-sealing version.
The design of the specified product series (ZRK/ZRKF/920/925.1) differs only slightly from
each other. The illustration lists all components of the valves.
DN 32 to DN 40
From DN 50 to DN 125
From DN 150 to DN 450

3 VALVE DESCRIPTION
Revision status: 03/05/2022 6 Index number: D0-117
3.1 Product lines
Product line
Characteristics
ZRK
From DN 32 to DN 1000.
Without spring return.
Centering via the outer diameter of the valve.
ZRKF
From DN 32 to DN 600.
With spring return.
Centering via the outer diameter of the
valve.
920
From DN 32 to DN 600.
Plastic version.
With and without spring return.
Centering via the outer diameter of the
valve.
925.1
From DN 50 to DN 200.
Plastic version.
Centering via the outer diameter of the
valve.

3 VALVE DESCRIPTION
Revision status: 03/05/2022 7 Index number: D0-117
3.2 Intended use
Check valves are valves used for backflow prevention in piping systems. AWS check valves
are characterized by their simple design as well as their short construction. They are
designed for direct installation between connecting flanges.
The mentioned swing check valves are suitable for industrial use in pipeline systems for the
transport of liquid and gaseous fluids. The valves are not suitable for solids. According to
directive 2014/68/EU (Pressure Equipment Directive) they are suitable for all fluids of group 1
and 2.
3.3 Description of function
Swing check valves are medium-controlled backflow preventers and open when the opening
force of the medium is greater than the closing force of the disc. In case of failure (e.g. pump
failure) or backflow of the medium, the valve closes automatically.
Intermediate flange - check valve in fully opened and closed condition
3.4 Pressure test of the valve
The valve is leak-tested at the factory with air or water. Therefore the following warnings
must be observed:
CAUTION
Residues on the valve
Residues of the test medium may still be left on the
contact surfaces of the valve.
Be aware of possible reactions with the operating
medium.
During a system pressure test of the system, the following warning must be observed:
WARNING
Excess pressure of the valve
In a system pressure test of the system, the pressure
must not exceed 1.5 times the max. permissible
pressure PS of the valve.
3.5 Scope of delivery
The valve is supplied ready for installation.
For valves with the add-on option S79, an additional grounding cable is included in the scope
of delivery.

4 TYPE PLATE
Revision status: 03/05/2022 8 Index number: D0-117
①Article description
②Nominal size
③Pressure range
④Commission number
⑤Flange connection
⑥Max. medium temperature
⑦Serial number
⑧Manufacturing Date
⑨Flow direction
⑩CE-marking
⑪ Number of the notified authority
⑫Address of the manufacturer
󰪧DN100 󰪪PN 10/16
󰪨PS 10 bar 󰪫Tmax. 60°C
󰪩121744-1 󰪬S.Nr.: 0119 󰪭06/20
0036
D-74676 Niedernhall
󰪦ZRK-VA1-VA1-250-E
Zimmerbachstraße 51
󰪮
󰪰
󰪱
󰪯
4 TYPE PLATE
A type plate is attached to each valve. The characteristics of the valve are listed on it. The
following figure shows the structure of such a type plate.
Structure of a type plate of the ZRK product line:
4.1 Article description breakdown
The following breakdown is an example of a standard valve for illustrative purposes.
*Spring only included in RSK 920 with spring return.
ZRK- ST-ST-80- T
Type
Material body
Material disc
Nominal size
Material sealing
ZRKF- VA1- VA1- 250-
E-
F1
Material body
Type
Nominal size
Material disc
Material spring
Material sealing
RSK 920/ 100/ 4/ E/F1*
Type
Nominal size
Design
Material sealing
Material spring
RSK 925.1/ 125/ E
Material sealing
Nominal size
Type