Weh TVR200 User manual

WEH®- We Engineer Hightech
Type TVR200
Operating instructions ⋅Betriebsanleitung
WEH®Check valve made of stainless steel
WEH®Rückschlagventil aus Edelstahl

Die deutsche Version ist das Original.
Hersteller: WEH GmbH Verbindungstechnik - im Nachfolgenden „WEH“ genannt.
LANGUAGES
TYPE TVR200 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4
WEH®Check valve made of stainless steel
TYP TVR200 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 20
WEH®Rückschlagventil aus Edelstahl
AE
DE
The German version is the original.
Manufacturer: WEH GmbH Precicion Connectors – hereinafter referred to as “WEH”.

The German version is the original.
Manufacturer: WEH GmbH Precision Connectors – hereinafter referred to as “WEH”.
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 8
2. INTENDED USE 9
3. PRODUCT OVERVIEW / PRODUCT DESCRIPTION 10
4. TECHNICAL DATA 12
5. STORAGE 13
5.1 Safety instructions for proper storage 13
5.2 Storage 14
6. REQUIRED TOOLS 14
7. INSTALLATION 15
7.1 Safety instructions for installation 15
7.2 Installing the check valve 16
8. COMMISSIONING 17
9. MAINTENANCE 17
9.1 Inspection 17
10. DISPOSAL 17
Type TVR200
WEH®Check valve made of stainless steel
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Operating instructions AE

1. INTRODUCTION
Dear Customer,
Thank you for deciding to use our products.
The WEH®TVR200 Check valve has been exclusively designed for reliably preventing
return flow in a gaseous or liquid media flow.
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
For explanation of abbreviations and definitions of terms see 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
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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.
ÎRead 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 intended
application and subject to strict quality controls.
- You are responsible for the correct operation 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 qualification 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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Operating instructions AE

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.
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. Tightening
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.
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.
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Operating instructions
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2. INTENDED USE
- The WEH®TVR200 Check valve has been exclusively designed for reliably preventing
return flow in a gaseous or liquid media flow.
ÎNever use the WEH®Product as a safety valve.
- WEH®Check valves were only developed for reliable return flow prevention. They
are not designed to be used as filling or safety valves. The separation or shut off
between different media or a medium and vacuum also does not represent a
fundamental intended use. If you have such an application or a similar application,
please contact us!
Note: The TVR valve has not been designed for use as a body that creates a complete
seal between two operating media, or one operating medium and the atmosphere or a
vacuum. The functionality of the inner seal depends on the pressure differential in the
seal direction along with many other operating conditions.
ÎOnly use the WEH®Product for industrial applications. The product was designed
and tested for that purpose. For automotive application, products with special
approvals are required.
- The WEH®Product is outfitted with an FKM seal as a standard feature. Other sealing
materials are available on request. Before using the product, please check the media
compatibility of the seals with your application.
- Only install the WEH®Product into a line system if the same medium is applied on both
sides and the system is operated at nominal load. Operation of a system at partial load
can cause flow disruptions that take effect in the form of vibrations or noises.
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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Operating instructions AE

3. PRODUCT OVERVIEW / PRODUCT DESCRIPTION
Basic version
TVR200-S1-A01 with
double ferrule fitting on both sides
TVR200-S1-A02 with
female thread on both sides
TVR200-S1-A03 with
male thread on both sides
Definition of ports
B1 Media inlet
B2 Media outlet
B1
B2
B1
B2
B1
B2
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Operating instructions
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Extended variants
TVR200-S1-A10 with
double ferrule fitting
and female thread
TVR200-S1-A11 with
double ferrule fitting
and male thread
TVR200-S1-A12 with female thread and
double ferrule fitting
TVR200-S1-A13 with female thread
and male thread
TVR200-S1-A14 with male thread and
double ferrule fitting
TVR200-S1-A15 with male thread
and female thread
Definition of ports
B1 Media inlet
B2 Media outlet
B1
B1
B1 B1
B1
B1
B2
B2
B2 B2
B2
B2
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Operating instructions AE

4. TECHNICAL DATA
Characteristics Basic version Extended variants
Product series TVR200-S1 TVR200-S1
Connection configuration A01, A02, A03 A10, A11, A12, A13, A14, A15
Media inlet "B1" /
Media outlet "B2"
- Tube Ø 6 - Ø 12 mm
- G1/8" - G1/4"
- NPT 1/8" - NPT 1/4"
- Tube Ø 6 - Ø 12 mm
- G1/8" - G1/4"
- NPT 1/8" - NPT 1/4"
Nominal diameter DN depending on the version depending on the version
Max. allowable
operating pressure PS 250 bar 250 bar
Cracking pressure PC* - 0.1 bar
- 0.5 bar
- 0.1 bar
- 0.2 bar
- 0.5 bar
- Other cracking pressures
on request
Temperature range -40 °C to +200 °C Depends on the sealing material
Leak rate** 1 x 10-4 mbar x l/s 1 x 10-4 mbar x l/s
Housing materials Stainless steel Stainless steel
Spring material Stainless steel Stainless steel
Sealing material FKM - FKM
- FFKM
- NBR
- EPDM
- HNBR
Lubricant Krytox®GPL 202 Krytox®GPL 202
Valve seat Ball sealing Ball sealing
Direction of flow B14B2 B14B2
*Please note that the indicated cracking pressure applies for a horizontal installation of the check vale. If you plan a
different direction of installation, these values may differ.
** This value refers to leakage at the separation point or sealing point between the two parts of the housing
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Operating instructions
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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 -40 °C up to +40 °C.
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 (especially against direct sunlight), oxygen,
ozone, heat, UV rays, solvents 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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Operating instructions AE

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 sales partner). 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 ageing state of the
stored WEH® Product, please contact WEH.
Attention: Before commissioning, check the WEH® Product for leak
tightness. On this topic, seeChapter 8. Commissioning on page 17.
> 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 Commissioning
-- Teflon tape (1.5 layers) X
-- Suitable open-ended spanner
(suitable for the relevant spanner widths) X
-- Suitable calibrated torque wrench
(suitable for the corresponding torque) X
-- Foaming leak detection agent X
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Operating instructions
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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.
ÎEnsure that the system is depressurized. Installation must only be effected in
depressurized condition.
ÎInstall the WEH®Product carefully without exerting any force.
The product must not be exposed to any additional mechanical stress. Additional
mechanical stress, e.g. lateral forces caused by connected pipes, may lead to
leakages and may cause the product to burst.
ÎRelevant technical standards must be observed during installation.
ÎThe WEH®Product is mounted between two pipe or hose ends of the media hose
line. Installation of the product may be carried out with the media line in any position,
horizontal, vertical, diagonal etc.
Attention: Observe the direction of the flow – the flow direction is marked on the
housing.
Note: Please note the information about the installation position on the quotation. If
the opening pressure is particularly low, an incorrect installation position may
negatively impact the product's functionality.
ÎPrior to installation, check that the counterparts are designed in accordance with the
assembly data (see Chapter 7.2 Installing the check valve) specified for the WEH®
Product by WEH.
Note: The indicated assembly data (tightening torques, assembly turns etc.) are values
that apply only to the components delivered by WEH.
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Operating instructions AE

7�2 Installing the check valve
Please note: Subsequent mentions of descriptions and position numbers refer to
Chapter 3. Product overview / product description on page 10.
ÎUnscrew the protection caps from the connection ports.
ÎUse an open-end spanner to hold the spanner flats in place when installing the
WEH®Product.
ÎInstall the WEH®Product into your system in a pressure-tight manner at connections
"B1" and "B2".
For the tightening torque, please refer to the table below.
Attention: Please note the flow direction marked on the product.
Note: For tube fittings, please note the WEH®Operating instructions "Products with
double ferrule fitting".
Note: For NPT thread, first wrap Teflon tape round the tapered screw fitting
(1.5layers). Then screw the fitting finger-tight into the connection and install it in
accordance with the information in the table below.
Connections Torque
G thread
Assembly turns
NPT thread*
1/8" 10 Nm ± 2 Nm 2.0–3.0
1/4" 30 Nm ± 2 Nm 2.0–3.0
*One turn corresponds to 360°
ÎPlease note the connection size marked on your product.
- Other connection sizes are available on request.
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Operating instructions
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8. COMMISSIONING
- Check the WEH®Product and connections for leak tightness before commissioning
for the first time.
ÎApply the operating pressure slowly to the WEH®Product slowly.
ÎUse a foaming leak detection agent to check the WEH®Product and connections to
the product for leak tightness. The test points must be sealed tight without any
bubbles.
Caution: Observe the technical data in Chapter 4 and all appropriate technical
standards and applicable legal requirements.
Attention: Do not use a leak detection spray that contains ammonia, since this could
cause corrosion to the product.
9. MAINTENANCE
ÎBased on intended use, the WEH®Product does not require maintenance. Inner leak
tightness can deteriorate over time due to various influences owing to the
applications.
9�1 Inspection
Regularly check the WEH®Product for leak tightness using
a leak spray at the separation point (Figure 1). This must be
performed at least once per year.
If the valve indicates values that are not permitted for your
application, please contact us.
10. DISPOSAL
ÎDispose of the WEH®Product appropriately when you no longer need it. Observe all
national and local regulations on disposal applicable at the time of disposal.
Figure 1
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Operating instructions AE