Weh TW67 User manual

WEH®- We Engineer Hightech
Type TW67
Operating instructions ⋅Betriebsanleitung Date: 09/22
WEH®Connector for filling gas cylinders with male thread
WEH®Adapter zum Füllen von Gasflaschen mit Außengewinde

Die deutsche Version ist das Original.
Hersteller: WEH GmbH Verbindungstechnik - im Nachfolgenden „WEH“ genannt.
The German version is the original.
Manufacturer: WEH GmbH Verbindungstechnik – hereinafter referred to as “WEH”.
LANGUAGES
TYPE TW67 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4
WEH®Connector for filling gas cylinders with male thread
TYP TW67 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 30
WEH®Adapter zum Füllen von Gasflaschen mit Außengewinde
AE
DE

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CONTENTS
1. INTRODUCTION 6
1.1 For your guidance 6
1.2 General information 7
1.3 Warranty and liability 7
1.4 General safety instructions 8
1.5 Definition of qualified personnel 9
2. INTENDED USE 9
3. PRODUCT OVERVIEW / PRODUCT DESCRIPTION 10
4. TECHNICAL DATA 15
5. STORAGE 16
5.1 Safety instructions for proper storage 16
5.2 Storage 17
6. REQUIRED TOOLS 17
7. INSTALLATION 18
7.1 Safety instructions for installation 18
7.2 Installing the media line 19
7.3 Checking the connection for leaks 19
Type TW67
WEH®Connector for filling gas cylinders with male thread

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Operating instructions AE
The German version is the original.
Manufacturer: WEH GmbH Verbindungstechnik - hereafter referred to as 'WEH'.
8. OPERATION 20
8.1 Safety instructions for operation 20
8.2 Connection 21
8.3 Disconnection 21
9. INSPECTION | MAINTENANCE 22
9.1 Safety instructions for inspection and maintenance 22
9.2 Maintenance intervals 23
9.3 Overview of minimum intervals for inspection and maintenance 24
9.4 Maintenance 25
10. TROUBLESHOOTING 26
11. DISPOSAL 28
12. ACCESSORIES | SPARE PARTS 28

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1. INTRODUCTION
Dear Customer,
thank you for deciding to use our products.
The WEH®TW67 Connector was developed for filling gas cylinders with male threads.
Observe and follow all instructions and warnings in these operating instructions�
Non-observance may result in personal injury and/or property damage�
1�1 For your guidance
The markings and symbols contained in these operating instructions have the
following meanings:
- Items are indicated by a dash
ÎCalls for action are indicated by an arrow
Figures
The illustrations and/or images used in these operating instructions are particularly
provided for illustrative purposes only and may differ in some details from the actual
product. For binding information, please refer to your individual orders.
Abbreviations / Definitions
For explanation of abbreviations and definitions of terms see applicable Technical
Appendix of the corresponding catalog or www.weh.com
Definition of signal words
Caution: A section marked with 'Caution' warns you about hazards that could result in
a slight, usually reversible personal injury if you do not comply with this instruction.
Attention: Sections marked ‘Attention’ warn you of situations that could lead to
property damage and disruptions in operation if you do not comply with the instruction.
Note: Sections marked ‘Note’ indicate that malfunctions in operation may occur if you
do not comply with the instruction.
Please note: Sections marked with ‘Please note’ provide you with additional
information for smooth operation.

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Operating instructions AE
1�2 General information
ÎFirst read these operating instructions to avoid misuse and resulting damage.
- In these operating instructions you will find all the necessary information and
instructions for the WEH®Product.
ÎThen check the contents of your delivery. Each delivery must contain:
- a delivery note
- an original WEH Test report (not applicable to spare parts)
- WEH operating instructions
ÎIf any documents are missing, please contact WEH or your responsible distributor.
1�3 Warranty and liability
- Our General Terms and Conditions apply.
ÎPlease read these operating instructions and safety instructions carefully and
follow the information contained therein.
- The information in these operating instructions reflects to the state of knowledge at
the time of printing. Failure to comply may void the warranty. Any side agreements
to these operating instructions require the written approval of the Head of the
Quality Department at WEH.
- Violation of these operating instructions result in the lapse of all warranty claims.
WEH will accept no liability for consequential damage, in particular damage due to
personal injury and/or other legal interests.
Caution: WEH®Products may only be repaired by WEH.
ÎContact WEH or the responsible distributor if the WEH®Product requires
maintenance. Special maintenance work that may be performed by the operator is
described in these operating instructions and is specially marked.
ÎOnly use original WEH®Spare parts. These are exactly suited to the WEH®Product
and subject to strict quality controls.
- You yourself are solely responsible for the proper performance of the replacement or
repair. WEH is not responsible for the performance or any damage and/or losses
arising from it. WEH assumes no guarantee, warranty, product liability or other
liability for any replacement or repair of the WEH®Product performed by you or a
third party. If you or a third party does not have the necessary skills and qualifi-
cation for proper performance, you must refrain from performing replacement or
repair. Otherwise, there is a particular risk of endangering yourself and third parties.

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1�4 General safety instructions
ÎAlways comply with all applicable local, national and international requirements,
stipulations, decrees, laws, standards, provisions, directives, norms, regulations,
prohibitions and instructions as well as all applicable industrial, quality and
technical standards. In particular, make sure that you and all users comply with the
applicable requirements related to occupational health and safety as well as
product safety requirements and that all required permissions, certificates and
approvals have been obtained.
ÎThese operating instructions should be provided to anyone responsible for the
installation, operation and maintenance of this WEH®Product.
- The WEH®Product and these operating instructions are intended for use by
qualified personnel (see Chapter 1.5). Make these operating instructions available
in particular to the qualified personnel responsible for the individual phases of the
life cycle (especially for storage, installation, operation, inspection and mainte-
nance, troubleshooting and disposal) of the WEH®Product. The qualified personnel
must have read and understood these operating instructions.
ÎContact WEH before using the WEH®Product if the instructions in these operating
instructions are unclear in any way.
ÎTake appropriate safety measures if operating conditions exist that could endanger
the user.
ÎIn case of any damage that may affect the proper functioning of the WEH®Product,
do not use the WEH®Product until the situation has been clarified. Disassembly of
the WEH®Product may only be performed by WEH.
ÎComply with the assembly data indicated in these operating instructions. Tighten-
ing with higher torques/assembly turns can result in damage or even fractures
when the system is pressurized.
ÎDo not use any auxiliary materials or cleaning agents other than those indicated
in these operating instructions. Using other auxiliary materials or cleaning agents
may cause damage to the WEH®Product or to downstream components.
- WEH is not responsible for damage caused by external forces or other external
influences.
- It is assumed that only transport and storage facilities suitable for the storage of
the WEH®Product are used.
ÎDo not apply any external forces to the WEH®Product. Therefore, do not lean on the
(connected) WEH®Product, do not hang on the WEH®Product and do not climb on
the WEH®Product under any circumstances. In addition, refrain from hammering on
the WEH®Product or similar. Such force effects can lead to damage to property and
personal injury. Also ensure that the WEH®Product is protected from being stepped
on or run over in any way.

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- The WEH®Product can become very hot or very cold due to the possible fluids
flowing through it, depending on the application and operating situation. In this
regard, observe the national and international regulations on occupational health
and safety to prevent injuries.
1�5 Definition of qualified personnel
- Qualified personnel, as defined by these instructions, are persons who, based on
their professional training, their knowledge (including the relevant standards and
regulations), experience and manual skills, can independently assess and properly
perform assigned work tasks (in conjunction with WEH®Products) and can thus
independently recognize and prevent potential dangers at an early stage.
2. INTENDED USE
- The WEH®TW67 Connector was developed for filling gas cylinders with male
threads.
- If you have ordered a customization from us, the WEH®Connector has been special-
ly adapted to the requirements and applications you have based your order on. The
underlying requirements and applications shall only be deemed to be confirmed in
so far as they have been expressly agreed to in writing by WEH. The connector must
not be used for applications and requirements other than those confirmed in writing
by WEH.
- Operation with a mixture of media can lead to damages due to residue or contamina-
tion, particularly in combination with oxygen. For this reason, make sure that the neces-
sary framework conditions (e.g. cleanliness) are met for operation with the respective
medium.
- The WEH®Connector is not suitable for emptying gas cylinders under pressure.
ÎAlways ensure that the WEH®Product is used only within the range of its intended
use. Please note in particular the technical data of the WEH®Product in Chapter 4 as
well as the marking on the WEH®Product itself.
- This WEH® Product is generally classified as pressure accessory in accordance
with Article 2 (5) of the Pressure Equipment Directive 2014/68/EU and is
considered to be similar to piping. This WEH®Product may not be used as safety
accessory. Furthermore, it is pointed out, that this WEH®Product is designed
and placed on the market in accordance with the requirements of Article 4 (3) of
the Pressure Equipment Directive 2014/68/EU. The assessment with regard to a
different classification can, however, be made on request.
Caution: Any use beyond the scope of application is considered as unintended use
and may result in personal injury and/or property damage.

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3. PRODUCT OVERVIEW / PRODUCT DESCRIPTION
Product Overview
TW67 - inline pallet filling TW67 - 90° pallet filling
TW67 - inline bundle filling TW67 - 90° bundle filling

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Product description
WEH®TW67 Connector - inline pallet filling
Pos� Description
1 Grip sleeve
4 Sealing shaft
7 Front seal (inside)
Definition of ports
B1 Media inlet
1
7
B1
4

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WEH®TW67 Connector - 90° pallet filling
Pos� Description
1 Grip sleeve
4 Sealing shaft
7 Front seal (inside)
Definition of ports
B1 Media inlet
1
7
B1
4

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Operating instructions AE
WEH®TW67 Connector - inline bundle filling
Pos� Description
1 Grip sleeve
4 Sealing shaft
7 Front seal (inside)
Definition of ports
B1 Media inlet
1
7
B1
4

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WEH®TW67 Connector - 90° bundle filling
Pos� Description
1 Grip sleeve
4 Sealing shaft
7 Front seal (inside)
Definition of ports
B1 Media inlet
1
7
B1
4

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4. TECHNICAL DATA
Please note: Depending on the application, the technical data of your WEH®Product
may differ from these operating instructions. Please therefore observe the marking on
the WEH®Product itself.
Characteristics Basic version
Maximum permissible
operating pressure PS 250 bar resp. 375 bar*
Media
temperature range
+5°C to +80°C
+5°C to +60°C (O2)
ConnectionA (cylinder
valve)
Male thread connection based on the relevant country standard
e.g. DIN, CEN, CGA, BS, NF etc.
Medium** Inert/flammable gases***, oxygen, noble gases, argon, nitrogen
Actuation Manual actuation via grip sleeve
Part materials Corrosion resistant
Sealing materials According to gas type
Filling type Pallet filling, bundle filling
Design**** With or without RPV pin
Conformity /
Tests /
Approvals
Type approval for suitability against adiabatic compression
available
*Please observe the pressure limits specified in the relevant cylinder valve standard. These values may be lower than the
max. allowable operating pressure of the WEH®Product.
** Other gases possible depending on the order confirmation
*** Inert gases are all noble gases and nitrogen. Other gases which are also considered inert under certain circumstances
(e.g. CO2, sulfur hexaflouride) must not be operated with the connector without consulting WEH.
**** depending on the application

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5. STORAGE
5�1 Safety instructions for proper storage
ÎMake sure that you always comply with these following safety instructions and
storage time.
Attention: Improper storage of the WEH®Product can significantly reduce the
maximum service life.
ÎProtect the WEH®Product against damage, contamination, inappropriate storage
and excessive temperature fluctuations.
ÎStore the WEH®Product, the accessories and spare parts in the original packaging
until they are used for the first time and during periods when they are not being
used.
ÎStore the WEH®Product within a temperature range of +5 °C to +80 °C
(+5 °C to +60 °C for O2). Storage temperatures outside this range may affect the
service life of the WEH®Product.
ÎDo not store the WEH®Product in the vicinity of heat sources. Avoid humidity and
condensation. The ideal relative air humidity for storage is approx. 65%.
ÎDo not store the WEH®Product together in the same space with solvents,
chemicals, acids, fuels or disinfectants.
ÎProtect the WEH®Product against light, in particular direct sunlight, oxygen, ozone,
heat, UV radiation, and other negative environmental influences. The service life of
parts made of elastomer or plastic may be substantially reduced by such
environmental factors.
ÎDo not stack WEH®Products. For storage and retrieval, follow the first-in-first-out
(FIFO) principle.

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5�2 Storage
ÎFollow the safety instructions in Chapter 5.1 and observe the following storage
times. The appropriate storage period applies from the date of delivery (i.e. the date
of invoicing or goods issue date as recorded by WEH or its distributor). If the
WEH®Product is installed in a complete system, the storage time depends on the
component with the shortest storage time.
Up to 3 years
ÎBefore use, check the surfaces of the external seals for cracks.
Attention: Any elastomer seals with fine cracks on the surface must
be replaced.
Note: If you should have any doubts about the aging state of the
stored WEH® Product, please contact WEH.
Attention: Before commissioning, check the WEH® Product for leak
tightness. On this topic, see Chapter 7. Installation on page 18.
> 3 years - Before use, all elastomer seals must be replaced.
ÎFor this, send the WEH®Product to WEH for maintenance.
6. REQUIRED TOOLS
Part no� Description Installation
Mainte-
nance &
Lubrication
-- Suitable open-ended wrench
(suitable for the relevant wrench sizes) X
-- Suitable calibrated torque wrench
(suitable for the corresponding torque) X
W136538 WEH®O-ring picker set*X
*The WEH®O-ring picker is manufactured from plastic and has to be considered as a
consumable product.

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7. INSTALLATION
7�1 Safety instructions for installation
ÎCheck the information provided in these operating instructions and the label on the
WEH® Product. The information must conform to your application.
ÎOnly connect the WEH®Product to faultless connections.
ÎCheck the WEH®Product for transport damages, contamination and other damage. If
you should detect anything wrong with the WEH®Product, it may no longer be used.
Replace the WEH®Product or send it to WEH for maintenance.
ÎRemove transport securing devices (such as protection caps) before installing the
WEH®Product. Transport securing devices serve the purpose of protecting the
product and connection ports during transport and storage. The transport securing
devices are not, for example, designed to withstand pressure or to be used as plugs.
ÎMake sure that there is no pressure on the hose connected to the WEH®Connector
and to the filling system. Installation must only be effected in depressurized
condition.
ÎAvoid using excessively short media lines and narrow bending radii. Lateral forces
may cause leakages or damage to components and make it more difficult to attach
the WEH®Connector properly.
ÎUse arrestor cables, partitions, etc. for additional safety where being used for
hazardous applications or under hazardous conditions.
ÎBefore installation, check if the counterparts are designed to withstand the assembly
data (see Chapter 7.2 Installing the media line) that WEH determined for this WEH®
Product.
Note: The assembly data (torques, assembly turns etc.) are values which apply
exclusively to the components delivered by WEH.

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7�2 Installing the media line
Please note: Subsequent mentions of descriptions and position numbers refer to
Chapter 3. Product overview / product description on page 10.
ÎUnscrew the protection cap from the port.
ÎWhen mounting the filling hose, hold an open-ended
wrench against the wrench size A/F(1) (Figure 1).
ÎScrew the media inlet "B1" pressure-tight onto the
connection port of the filling hose (Figure 1).
For the tightening torque, please refer to the table below.
Ports Torque
M16x1.5 20 Nm ± 2 Nm
ÎPlease note the connection size marked on your product.
- Other connection sizes are available on request.
7�3 Checking the connection for leaks
ÎConnect the connector to a closed cylinder valve.
ÎSlowly apply the operating pressure to the connector and media line.
Caution: The cylinder valve must be closed/locked.
ÎCheck the connector, the connection to the media line and the connection to the
cylinder valve for leak tightness.
Figure 1
A/F(1)
B1

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8. OPERATION
8�1 Safety instructions for operation
Please note: Subsequent mentions of descriptions and position numbers refer to
Chapter 3. Product overview / product description on page 10.
ÎApply pressure to the WEH®Connector only once it has been connected to a
cylinder valve.
ÎDo not use excessive force when actuating.
ÎFollow the steps in exactly the right order when connecting and disconnecting the
WEH®Connector.
ÎAttach and detach the WEH®Connector only when it is not under pressure.
ÎConnect the WEH®Connector only onto cylinder valves in perfect working order.
ÎAlign the WEH®Connector correctly with the test piece to prevent damage to the
front seal caused by any sharp edges that the test piece may have.
ÎOnce the connection has been made, always test the connection by tugging a little
on the WEH®Connector to make sure that is fully engaged before introducing
the pressurized test medium.
ÎKeep the WEH®Connector free of oil, grease and dust.
Attention: Contamination in the gas channel can cause oxygen combustion.
ÎThe WEH®Connector is not fitted with an integrated shut-off valve and thus will
not prevent loss of medium in case of improper connection or after disconnect-
ing. Apply pressure to the connector only once it has been properly connected. It
is important to disconnect the connector only under absolutely safe conditions.
In particular, the connector must be fully depressurized during the disconnection
process.