Flowserve Argus EK Series Guide

This operating manual must be read prior to installing,
commissioning, and maintaining this equipment.
Argus Ball Valve EK, FK and HK
High Performance Ball Valves
BA1000 EN
Translation of the Original Operating Manual
Installation
Commissioning
Maintenance

Copyright
All rights reserved. No part of this operating manual may be reproduced, stored in a retrieval system or
transmitted in any form or by any means without the prior consent of Flowserve Corporation.
Document Version
Rev.: B –23-Sep-2019

Argus Ball Valve EK, FK and HK Operating Manual –BA1000 EN
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Table of Contents
1General Information....................................................................................................6
1.1 Scope of this Operating Manual .................................................................................... 6
1.2 Disclaimer........................................................................................................................... 6
1.3 Safety Messages................................................................................................................ 7
1.4 Argus Ball Valve as Pressure Equipment ...................................................................... 12
1.5 Argus Ball Valve as “Partly Completed Machinery” .................................................. 13
1.6 Units ................................................................................................................................... 13
1.7 Operating Parameters/Limits of the Argus Ball Valve................................................ 13
1.8 Nameplate: Identification of the Argus Ball Valve..................................................... 13
2Safety Information .....................................................................................................15
2.1 Grouped Safety Messages ............................................................................................ 15
2.2 Responsibility of the Operating Company ..................................................................21
2.3 Qualified Personnel.........................................................................................................22
2.4 Personal Protective Equipment..................................................................................... 22
2.5 Personnel Qualification ..................................................................................................23
2.6 Target Groups .................................................................................................................. 23
2.7 Notes on Product Warranty ........................................................................................... 25
2.8 Intended Use.................................................................................................................... 25
2.9 Non-intended Use ........................................................................................................... 26
2.10 General Sources of Danger/Residual Risks..................................................................27
3Product Description...................................................................................................29
3.1 General Product Description......................................................................................... 29
3.2 Design ............................................................................................................................... 29
3.3 Scope of Delivery ............................................................................................................ 30
4Consignment Receipt ...............................................................................................31
4.1 Safety Messages..............................................................................................................31
4.2 Checking the Consignment Receipt for Completeness ........................................... 31
4.3 Unpacking the Argus Ball Valve.................................................................................... 31
5Installation..................................................................................................................32
5.1 Safety Messages..............................................................................................................32

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5.2 Preparing the Flange and Welded Installation........................................................... 32
5.3 Installing the Argus Ball Valve via a Flange Connection...........................................33
5.4 Installing the Argus Ball Valve via a Welded Connection......................................... 35
5.5 Installing/Aligning the Actuator .................................................................................... 37
6Commissioning..........................................................................................................38
6.1 Safety Messages..............................................................................................................38
6.2 Requirements for Commissioning .................................................................................39
6.3 Flushing and Pressure Testing of the Piping .................................................................39
6.4 Operating the Argus Ball Valve..................................................................................... 39
7Maintenance .............................................................................................................42
7.1 Safety Messages..............................................................................................................42
7.2 Required Spare Parts for Maintenance .......................................................................43
7.3 Maintenance Schedule .................................................................................................43
8Troubleshooting Guide .............................................................................................44
8.1 Safety Messages..............................................................................................................44
8.2 Required Spare Parts for Repair Works.........................................................................44
8.3 Troubleshooting Table ....................................................................................................45
8.4 Retightening the Stuffing Box Screws (if present) and Replacing the Seals ........... 45
8.5 Draining the Argus Ball Valve with the Drain Plug (if present) .................................. 47
8.6 Draining the Argus Ball Valve with the Safety Plug (if present) ................................ 48
8.7 Returning the Argus Ball Valve for Repair.................................................................... 50
9Decommissioning and Disassembly .......................................................................51
9.1 Safety Messages..............................................................................................................51
9.2 Decommissioning and Disassembly of the Argus Ball Valve..................................... 52
10 Storage .......................................................................................................................53
10.1 Safety Messages..............................................................................................................53
10.2 Storing the Argus Ball Valve........................................................................................... 53
11 Packaging..................................................................................................................55
11.1 Safety Messages..............................................................................................................55
11.2 Packaging the Argus Ball Valve.................................................................................... 55

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12 Transportation ............................................................................................................57
12.1 Safety Messages..............................................................................................................57
12.2 Transporting the Argus Ball Valve ................................................................................. 58
13 Disposal and Recycling............................................................................................59
13.1 Safety Messages..............................................................................................................59
13.2 Disposing and Recycling the Argus Ball Valve............................................................ 60
Annex A: Declaration of Conformity ............................................................................61
Annex B: Declaration of Incorporation.........................................................................62
Annex C: Pressure-Temperature Diagrams for Ball Seats...........................................63
Annex D: Max. Permissible Screw Tightening Torques for Stuffing Box......................65

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Overview of Argus Ball Valve Types
Brand
Argus
Series
HK 35
EK 71
FK 75M / FK 75
FK 76M / FK 76
FK 79
Design
Trunnion-mounted
ball
Floating ball
Pad-mounted ball
Trunnion-mounted
ball
Floating ball
Size Range
DN 40–500,
1½″–20″
Full bore or
reduced bore
DN 15–50,
½″–2″
Full bore or
reduced bore
DN 80–200,
3″–8″
Full bore or
reduced bore
DN 80–900,
3″–36″
Full bore or
reduced bore
DN 15–100,
½″–4″
Full bore or
reduced bore
Pressure
Classes
PN
10–250
16–100
16–40
16–160
16–250
ASME
class
600–2500
150–600
150–300
150–900
150–2500
Connections
Flange connection
or welding ends
Flange
connection
Flange connection
Flange connection
or welding ends
Flange
connection
or welding ends
Body Material
–Fine grain steel
(forged or cast)
–Stainless steel
–Special steel, e.g.,
Duplex SS
Monel
Inconel
Hastelloy
Alloy 20
–Fine grain steel
(forged)
–Fine grain steel
(forged or cast)
–Stainless steel
–Special steel, e.g.,
Duplex SS
Monel
Inconel
Hastelloy
Alloy 20
–Fine grain steel
(forged or cast)
–Stainless steel
–Special steel, e.g.,
Duplex SS
Monel
Inconel
Hastelloy
Alloy 20
–Fine grain steel
(forged or cast)
–Stainless steel
–Special steel,
e.g.,
Duplex SS
Monel
Inconel
Hastelloy
Alloy 20
Ball Seat
Material
–POM
–DEVLON
–PEEK (LYTON)
–ARGULOY
(metallic)
–CARBIDE
(metallic)
–PTFE
–POM
–PTFE
–POM
–DEVLON
–PEEK (LYTON)
–ARGULOY
(metallic)
–CARBIDE
(metallic)
–PTFE
–POM
–DEVLON
–PEEK (LYTON)
–ARGULOY
(metallic)
–CARBIDE
(metallic)
–PTFE
–POM
–PEEK (LYTON)
–ARGULOY
(metallic)
–CARBIDE
(metallic)
Special Design
& Accessories
Refer to Flowserve catalogues and data sheets or contact Flowserve Flow Control GmbH.

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Figure 1: Components of the Argus Ball Valve
Ball seat and
ball seal
Ball
Body
Connecting plate
for automation
Connection plate
for
automation
Stem
Stem seal

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1General Information
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1General Information
1.1 Scope of this Operating Manual
This operating manual is intended to familiarize the reader with the Argus Ball Valve and its
intended use. Operating the Argus Ball Valve in compliance with this operating manual is
important to help ensure reliability in service and avoid risks.
This operating manual provides information for qualified personnel on the intended use of
the Argus Ball Valve as well for its special design variants.
Read this operating manual prior to handling the Argus Ball Valve in any region
worldwide and pay particular attention to the marked safety-relevant warnings,
information and instructions.
Do not put the Argus Ball Valve into service until all of the safe operating
conditions referred to in this operating manual have been met.
Failure to comply with the information provided in the operating manual shall
be considered to be misuse. Personal injury, product damage, delays in
operation, or product failure caused by misuse are not covered by the
Flowserve warranty.
Observe all relevant local regulations for occupational safety and health –
even when they are not stated explicitly in this operating manual.
Always coordinate repair works with the personnel of the operating company,
and follow all industrial plant safety requirements and applicable occupational
health and safety legislation.
Immediately inform Flowserve Flow Control GmbH if documents are missing or
damaged, illegible or incomplete in order to receive a replacement –if desired
in electronic form.
Keep this operating manual close to the product's operating location or directly
with the product.
1.2 Disclaimer
Information in this operating manual is believed to be complete and reliable. In spite of all
efforts made by Flowserve Flow Control GmbH to provide comprehensive information and
instructions, good engineering and safety practices should always be followed. In cases of
doubt consult a qualified engineer.
Flowserve Flow Control GmbH manufactures products in conformance to relevant
International Quality Management System Standards as certified and audited by external
quality assurance organizations. Genuine parts and accessories have been designed,
tested, and incorporated into the products to help ensure consistently high product quality
and performance in use. As Flowserve Flow Control GmbH cannot test parts and
accessories sourced from other vendors the (incorrect) installation of such parts and
accessories may adversely affect the performance and safety features of the product. The
failure to properly select, install, or use authorized Flowserve spare parts and accessories
shall be considered to be product misuse. Damage or failure caused by product misuse is

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1General Information
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not covered by Flowserve's warranty. In addition, any modification of Flowserve products or
removal of original components may impair the safety of these products in use.
1.3 Safety Messages
This safety section contains detailed explanations about the different kinds of safety
messages used in this operating manual.
ANSI Z535.6 specifies four different types of safety messages:
Supplemental directives
Grouped safety messages
Section safety messages
Embedded safety messages
Supplemental directives instruct readers to read an entire manual or direct them to specific
safety information contained in the operating manual or from other sources. Supplemental
directives usually appear at the beginning of a safety messages section of a chapter.
Grouped safety messages provide a general description of the risks involved in using the
Argus Ball Valve and how to minimize these risks. Grouped safety messages are included in
Section 2.1 Grouped Safety Messages and in some safety messages section of a chapter.
Section and embedded safety messages caution against residual risks that may occur
during intended and non-intended (reasonably foreseeable misuse) use of the Argus Ball
Valve. Furthermore, section and embedded safety messages provide information on
avoiding hazards that may be caused by different working situations and hazardous areas
within the product life cycle.
Section safety messages are included in the safety messages section of a chapter.
Embedded safety messages precede an action step that may pose an especially severe
hazard.

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1.3.1 Safety Symbols and Their Description
This operating manual contains specific safety instructions with signal word panels which, if
not observed, would cause a hazard. The specific signal word panels are:
Table 1: Explanation of the signal word panels
Signal word panel
Description
DANGER
This signal word panel indicates an imminently hazardous
situation which, if not avoided, will result in death or serious injury.
Observe all safety messages having this signal word panel to
avoid the hazard.
WARNING
This signal word panel indicates a potentially hazardous situation
which, if not avoided, will result in death or serious injury. Observe
all safety messages having this signal word panel to avoid the
hazard.
CAUTION
This signal word panel indicates a potentially hazardous situation
which, if not avoided, will result in minor or moderate injury.
Observe all safety messages having this signal word panel to
avoid the hazard.
NOTICE
This signal word panel is used to alert about an activity which
may lead to property damage. Observe all safety messages
having this signal word panel to avoid the hazard.
Table 2: Additional symbols
Symbol/Warning Sign
Description
GENERAL HAZARD
Indicates a general hazardous situation which, if not
avoided, could lead to personal injury and/or result in
property damage.
HEAVY OBJECT HAZARD
Indicates a heavy object hazard which, if not avoided,
could lead to personal injury and/or property damage.
EXPLOSIVE MATERIAL HAZARD
Indicates an explosive material hazard which, if not
avoided, could lead to personal injury and/or property
damage.
MOVING PARTS HAZARD
Indicates a moving parts hazard which, if not avoided,
could lead to personal injury and/or property damage.
SUSPENDED LOAD HAZARD
Indicates a suspended load hazard which, if not avoided,
could lead to personal injury and/or property damage.

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Symbol/Warning Sign
Description
TOXIC HAZARD
Indicates a toxic hazard which, if not avoided, could lead
to personal injury and/or property damage.
HOT SURFACE HAZARD
Indicates a hot surface hazard which, if not avoided, could
lead to personal injury and/or property damage.
FLAMMABLE MATERIAL HAZARD
Indicates a flammable material hazard which, if not
avoided, could lead to personal injury and/or property
damage.
PRESSURE HAZARD
Indicates a pressure hazard which, if not avoided, could
lead to personal injury and/or property damage.
ELECTRICAL HAZARD
Indicates an electrical hazard which, if not avoided, could
lead to personal injury and/or property damage.
EXPLOSIVE ATMOSPHERE HAZARD
This ATEX explosive atmosphere marking indicates an
explosive atmosphere hazard which, if not avoided, could
lead to personal injury and/or property damage.
ENVIRONMENTAL HAZARD
Indicates environmental hazards due to hazardous
substances.
HEALTH HAZARD
Indicates health hazards due to irritant hazardous
substances.
PHYSICAL HAZARD
Indicates physical hazards due to fire-promoting hazardous
substances.
PHYSICAL HAZARD
Indicates physical hazards due to explosive hazardous
substances.
Indicates a potential personal injury and/or property
damage. Observe all supplemental directives which include
this symbol.
Indicates particularly important information. Comply with all
general notices bearing this symbol.
1.
2.
3.
Introduces an action step.

Introduces a condition related to a following action step.

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Symbol/Warning Sign
Description

Introduces a secondary action step or an action step within
safety messages or instructions.

Introduces a result of preceding action steps.

Introduces an entry in a list.
1.3.2 Typographical Conventions for Special Designations
The following typographical conventions are observed for special designations:
Foreign-language designations consisting of two or more words are italicized.
Designations of objects (e.g., buttons, text boxes, switches, levers, knobs) of a product
(machine or software) are written in SMALL CAPS for better legibility.
1.3.3 Typographical Conventions and Content Structure in General Instructions
General instructions observe the following typographical conventions and content
structure:
General instructions
Example:
This operating manual contains further information on using the Argus Ball Valve.
1.3.4 Typographical Conventions and Content Structure in Safety Messages
Supplemental Directives
Supplemental directives observe the following typographical conventions and content
structure:
Action step
Example:
Keep this operating manual close to the product’s operating location or directly
with the product.

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Grouped Safety Messages
Grouped safety messages observe the following typographical conventions and content
structure:
Signal word panel
Type and source of the hazard!
Consequences of failing to avoid hazard.
Action step to avoid the hazard.
Example:
Risk of property damage due to high temperatures during welding!
High temperatures due to welding may lead to a damaged ball sealing.
Monitor the temperature of the valve body in the seat area by using the temperature-
sensing strips during welding.
Section Safety Messages
Section safety messages observe the following typographical conventions and content
structure:
Warning sign
Signal word panel
Type and source of the hazard!
Consequences of failing to avoid hazard.
Action step to avoid the hazard.
Signal word panel
Type and source of the hazard!
Consequences of failing to avoid hazard.
Action step to avoid the hazard.
Example:
Risk of injury due to improper securing during transport!
Improper securing during transport may cause severe injury.
Secure the Argus Ball Valve against twisting and tipping over.

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Risk of property damage due to improper securing during transport!
Insufficiently securing during transport may cause property damage.
Secure the Argus Ball Valve against twisting and tipping over.
Embedded Safety Messages
Embedded safety messages observe the following typographical conventions and content
structure:
Signal word panel
Type and source of the hazard!
Consequences of failing to avoid hazard.
Action step to avoid the hazard.
Example:
Risk of injury due to trapped pressure!
Pressure trapped in the inside of the Argus Ball Valve may cause severe injury.
Before removing and/or loosening the drain plug, operate the Argus Ball Valve several
times so that the trapped pressure can escape.
1.4 Argus Ball Valve as Pressure Equipment
The design of Argus Ball Valves takes all relevant laws, directives, standards, and
specifications into account, such as the European Directive for Pressure Equipment
2014/68/EU, EN 12516, AD 2000 Regulations, API 6D and ASME/ANSI B16.34 and others,
depending on the specified application.
The careful selection, design and calculation of materials as well as quality assurance
performed during materials procurement, in production and on finished products ensure the
elimination of pressure-related hazards when the Argus Ball Valves are used as intended.
As a manufacturer, Flowserve Flow Control GmbH applies the conformity assessment
procedure according to module H (Article 14 of European Pressure Equipment Directive
2014/68/EU), i.e., “Comprehensive Quality Assurance”as described in Appendix III,
Paragraph 11.
Argus Ball Valves are marked according to the provisions of the European Pressure
Equipment Directive with the CE mark as well as the identification number of the notified
conformity assessment body.
For the Argus Ball Valves, which are covered by the provisions of the European Pressure
Equipment Directive 2014/68/EU, the EU declaration of conformity is part of this operating
manual.

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1.5 Argus Ball Valve as “Partly Completed Machinery”
The automated Argus Ball Valve, i.e., an assembly consisting of an Argus Ball Valve and a
mounted pneumatic, hydraulic, or electric actuator with the corresponding control
components for an automated operating of the complete automated unit, can be
considered to be “machinery” in the sense of the European Machinery Directive
2006/46/EC. An Argus Ball Valve prepared for assembly with an actuator is thus regarded as
“partly completed machinery”in the sense of the European Machinery Directive
2006/46/EC.
The European Machinery Directive 2006/46/EC requires that any hazards for persons and for
the environment must be excluded when using the machinery.
Flowserve Flow Control GmbH certifies by the “Declaration of Incorporation” delivered with
each Argus Ball Valve prepared for automation that the Argus Ball Valve poses no risks
during assembly, installation into the industrial plant and during operation of the automated
unit.
This operating manual for the Argus Ball Valve is part of the complete documentation of the
automated unit (Argus Ball Valve and actuator).
1.6 Units
In this operating manual, the metric unit system (SI) is used.
1.7 Operating Parameters/Limits of the Argus Ball Valve
Argus Ball Valves are designed for special applications. Type, model, material selection,
nominal size, special features, attachments, accessories, and valve qualification are
adapted to the specified operating conditions. This results in operating parameters/limits
concerning fluids (media), pressure, temperature, and environmental conditions for each
Argus Ball Valve.
The metallic nameplate attached to the Argus Ball Valve provides information on these
operating parameters/limits: See also 1.8 Nameplate: Identification of the Argus Ball Valve.
The nameplate permanently attached to the Argus Ball Valve body indicates the
operating parameters/limits of the equipment. The maximum permissible operating
pressure and the maximum permissible operating temperature must never be
exceeded.
1.8 Nameplate: Identification of the Argus Ball Valve
The nameplate permanently affixed to the ball valve body provides the most important
information regarding the design and use of the Argus Ball Valve.
If the nameplate is missing or illegible, do not put the Argus Ball Valve into operation.
Instead, contact the Service Teams at Flowserve Flow Control GmbH or the
Flowserve Quick Response Centers for support.

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[1] Nominal Pressure (Class/PN)
[2] Argus Type
[3] Nominal Size
[4] Order Number & Order Item (from Flowserve Flow Control GmbH)
[5] Material Combination
[6] Test Pressure
[7] Fabrication Number (Serial Number)
[8] Permissible Maximum & Minimum Temperature –TS*
[9] Date of Manufacture
[10] Maximum Permissible Operating Pressure at Room Temperature –PS*
[11] Article Number
*Observe temperature-dependent limit values for the pressure load for non-metallic
sealing material. Refer to Annex C: Pressure-Temperature Diagrams for Ball Seats.
CE marking according to European Pressure Equipment Directive 2014/68/EU (PED):
According to the provisions of European Pressure Equipment Directive 2014/68/EU,
Argus Ball Valves and equipment classified in Category II and above are marked
with the CE symbol and the identification number of the notified body (“0036”).
Argus Ball Valves in Category I are marked with “CE”only. Argus Ball Valves which,
due to their design, are not covered by the Directive do not bear the CE marking.
The attached EU conformity declaration according to 2014/68/EU certifies that the
provisions from the Directive have been fulfilled for the affected Argus Ball Valves
and equipment.
[1]
[2]
[3]
[4]
[5]
[6]
[10]
[11]
[9]
[8]
[7]

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2Safety Information
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2Safety Information
2.1 Grouped Safety Messages
The following sections contain grouped safety messages on qualifications of personnel and
on important life cycle stages of the Argus Ball Valve.
2.1.1 Personnel Qualification
Risk of injury due to insufficiently qualified personnel!
Insufficiently qualified personnel may lead to severe injury.
Only deploy qualified personnel with appropriate personal protective equipment (PPE)
and suitable work tools. See Chapter 2 Safety Information.
Ensure that unauthorized persons do not have any access to the Argus Ball Valve.
Risk of property damage due to insufficiently qualified personnel!
Deploying insufficiently qualified personnel may lead to damage of the Argus Ball Valve.
Only deploy qualified personnel with appropriate personal protective equipment (PPE)
and suitable work tools. See Chapter 2 Safety Information.
Ensure that unauthorized persons do not have any access to the Argus Ball Valve.

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2.1.2 Argus Ball Valve Life Cycle Stages
Installation
Risk of injury due to improper installation works!
Improper installation works may cause severe injury or death.
Only deploy qualified personnel with appropriate personal protective equipment (PPE)
and suitable work tools. See Chapter 2 Safety Information.
Ensure that unauthorized persons do not have any access to the Argus Ball Valve.
Ensure that the Argus Ball Valve is designed for the special operating conditions.
Ensure that the connections, in particular the welding parameters, comply with the
design specifications of the Argus Ball Valve.
Monitor the temperature of the valve body in the seat area by using the temperature-
sensing strips during welding.
Provide safety instructions relating the piping (including the Argus Ball Valve).
When installing the Argus Ball Valve via flange connection, determine the required
tightening torques of the bolts.
After completing the installation and before actuating the Argus Ball Valve, make sure
to flush out the piping system.
If the Argus Ball Valve is intended to serve as permanent shut-off from the atmosphere,
provide a blind flange or equivalent end.
Risk of property damage due to improper installation works!
Improper installation works may cause property damage.
Only deploy qualified personnel with appropriate personal protective equipment (PPE)
and suitable work tools. See Section 2.2 to 2.4.
Ensure that unauthorized persons do not have any access to the Argus Ball Valve.
Use appropriate safety measures in the workplace to ensure that parts cannot fall off.
Risk of property damage due to high temperatures during welding!
High temperatures due to welding may damage the ball sealing.
Monitor the temperature of the valve body in the seat area by using the temperature-
sensing strips during welding.

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Risk of environmental pollution due to hazardous fluid residues!
Hazardous fluid residues may harm the environment.
Handle hazardous fluid residues with care.
Temporarily place the Argus Ball Valve in the half-open position to let hazardous fluid
residues escape.
Use a vessel to collect any hazardous fluid residues and properly dispose of them.
Commissioning/Decommissioning and Disassembly
Risk of injury due to improper commissioning/decommissioning!
Improper commissioning/decommissioning may cause severe injury or death.
Only deploy qualified personnel with appropriate personal protective equipment (PPE)
and suitable work tools. See Section 2.2 to 2.4.
Ensure that unauthorized persons do not have any access to the Argus Ball Valve.
Risk of property damage due to improper installation works!
An improper commissioning/decommissioning may cause property damage.
Only deploy qualified personnel with appropriate personal protective equipment (PPE)
and suitable work tools. See Section 2.2 to 2.4.
Ensure that unauthorized persons do not have any access to the Argus Ball Valve.
Use appropriate safety measures in the workplace to ensure that parts cannot fall off.
Flushing poses a risk of property damage!
Pressure from flushing may damage the sealing elements.
Operate the Argus Ball Valve in the fully open or fully closed (90°) position.
After flushing, check the tightness of the flange connections.
If necessary, retighten the screws of the flange connection.

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Risk of environmental pollution due to hazardous fluid residues!
Hazardous fluid residues may harm the environment.
Handle hazardous fluid residues with care.
Temporarily place the Argus Ball Valve in the half-open position to let hazardous fluid
residues escape.
Use a vessel to collect any hazardous fluid residues and properly dispose of them.
Maintenance/Troubleshooting
Risk of injury due to improper maintenance/repair works!
Improper maintenance/repair works may cause severe injury or death.
Only deploy qualified personnel with appropriate personal protective equipment (PPE)
and suitable work tools. See Section 2.2 to 2.4.
Ensure that unauthorized persons do not have any access to the Argus Ball Valve.
Ensure that the Argus Ball Valve is designed for the special operating conditions.
Ensure that the connections, in particular the welding parameters, comply with the
design specifications of the Argus Ball Valve.
Monitor the temperature of the valve body in the seat area by using the temperature-
sensing strips during welding.
Provide safety instructions relating the piping (including fittings).
When installing the Argus Ball Valve via flange connection determine the required
tightening torques of the bolts.
Make sure to flush the piping after the installation has been completed and before the
Argus Ball Valve is actuated.
If the Argus Ball Valve is used for permanent shut-off from the atmosphere, provide a
blind flange or equivalent end.
Only use original spare parts provided by Flowserve Flow Control GmbH.