Talis ERHARD INFINITY 0140160 Series User manual

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Table of contents
1 Safety and general aspects
2 Product and functional
description
3 Transport, handling and lifting
4 Storage
5 Installation into the pipeline
6 Initial operation and
commissioning
7 Maintenance
8 Hydraulic characteristics
9 CE marking
10 After sales service contact
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
SERIES 0140160
INFINITY resilient seated gate valves
DN40/300, PN10/16, TYPE PE, BARE SHAFT FOR MANUAL OPERATION
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1- SAFETY AND
GENERAL ASPECTS
1.1 Preface
Dear user, prior to initial operation, read these operating
and maintenance instructions thoroughly to ensure safe and
economical operation.
The operating and maintenance instructions contain all
information required for operation and maintenance of the valve.
These operating and maintenance instructions are part of the
complete documentation.
Prior to commissioning the valve in the plant, all safety
requirements must be complied with.
The valve shall only be operated by qualified and trained staff.
If maintenance work is neglected or
carried out by untrained persons,
our warranty obligation, according
to our terms and conditions of
delivery, will not apply.
Please use only original spare parts
supplied by our company to ensure
best quality and exchangeability.
The manufacturer prohibits the
making of any modifications
to the valve. If the user modifies the valve, this may void the
manufacturer’s warranty.
We reserve the right to make technical modifications to the
data and representations contained in these Operating and
Maintenance Instructions for the purpose of improving the valves.
1.2 Basic safety instructions
1.2.1 Adherence to operating instructions
Prior to unloading, transport, commissioning and maintenance
of the valve, the operating and maintenance instructions must be
thoroughly read and strictly observed.
In the case of non-compliance with these Operating Instructions,
we will not be liable for any damage or consequences resulting
therefrom.
In addition to the operating and maintenance instructions and the
regulations concerning prevention of accidents applicable in the
user’s country and place of installation, the approved technical
rules for relevant worker qualifications and safety standards
must also be adhered to.
The user's staff are responsible for ensuring that they are
familiar with the local rules concerning safety and prevention of
accidents.
The technical data pertaining to the ordered product(s) are binding
for the type of design. Modifications can only be considered
if they are specified to us in time before starting production.
Every product is checked for completeness, performance, and
tightness before leaving the factory.
1.2.2 Intended use
Due to their design and the materials used, our valves of standard
design are approved for those media (concentration, pressure,
temperature) which are indicated in the technical brochure and
operating instructions specific to the product.
Deviating operating instructions and fields of application are
subject to the manufacturer’s approval.
1.2.3 Duties of the user
Whoever, on the user's premises is engaged in mounting,
commissioning, operation and maintenance of this valve,
should read the complete Operating Instructions (especially any
referenced basic safety instructions) and understand them. This
particularly applies to staff who work only occasionally at the
plant.
This machine
shall only be operated
by qualified and
trained staff.
WARNING
In the event of non-compliance with
these Installation, Operation and
Maintenance manual, we shall not be
liable for any damages or operating
problems resulting therefrom.
Misuse, particularly on valves
pressured by liquids, can result
in personal injury and damage to
property.
WARNING
The following chapter “Basic safety
instructions“ has to be strictly observed
in order to maintain health and safety of
the operating and maintenance staff and
to ensure operativeness of the valves.
Non-compliance with these instructions
may jeopardise the manufacturer’s duty
of guarantee and warranty.
FOLLOW OPERATING INSTRUCTIONS!

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FOLLOW OPERATING INSTRUCTIONS!
WARNING
It is strictly forbidden to modify,
remove, by-pass or override the safety
installations.
In the absence of prior written approval by the manufacturer,
do not carry out any modifications to the accessories and
equipment surrounding the valve which may jeopardise safety!
Changes at the valve carried out on one’s own authority void the
manufacturer’s liability for any damage resulting therefrom.
This applies also to installation and setting of safety devices and
valves, as well as welding at supporting parts.
1.2.4 Dangers when handling the valve
Our valves are designed to the state of the art and according to
the approved safety rules. However, these valves can constitute
a danger for persons and property especially when handled by
untrained staff in an unskilled manner or when they are not used
in accordance with their proper purpose. This may cause danger
to life and limb of the user or third parties or damage to the
valves and other property.
Access to the danger zone shall only be possible when the valve
is out of operation and when it is ensured that the conveying units
and the following units are shut down, in order to avoid danger to
the operating and maintenance staff.
Whoever, in the user’s facilities, is engaged in mounting,
dismantling or remounting, operation and service (inspection,
maintenance, repair) of the valves, must familiarise themselves
with the applicable regulations in force locally.
Work at the valve site (as e.g. control, maintenance and repair
work) shall only be carried out when the plant has been secured
and shut down and when power to the valve/plant has been
switched off.
Before removing safety devices and/or carrying out work on the
valves, the pipe section must be made pressureless to avoid risk.
Unauthorized, erroneous or unexpected operation, as well as
dangerous movements caused by stored energy (compressed
air, pressurized water, hydraulic system), must be avoided.
A copy of the operating and maintenance instructions must
always be available on site and must be protected against oil and
grease.
If necessary, or as specified by the rules, use suitable personal
protective equipment!
Any instructions concerning safety and dangers at the plant must
be observed and a written copy must be maintained in legible
condition and periodically renewed or replaced, if necessary.
During operation, the gearbox and/or actuator is heated under
constant regulating service. This may lead to temperatures
>60°C. For protection against possible burns, the surface
temperature must be checked before touching the surface and
in all cases, protective gloves must be worn.
In the event of changes to the valve or its operating performance
which might affect safety aspects, plant operation must be
stopped immediately and the problem reported to the relevant
department/person!
Before any maintenance operation on the valve, the network
section where the valve is installed must be isolated upstream
and downstream, and depressurized in order to relieve the valve
free from pressure. Failure to comply with this recommendation
will lead to a situation of danger to persons and property.
When maintenance and repair work at the valve has been
finished prior to commissioning of the valve, check whether all
safety devices and equipment have been remounted and make
sure that they are operative.
If PLC (programmable logic control) software is included in the
scope of supply, no changes must be carried out.
If work is carried out in the vicinity of the valve that may lead to
soiling (e.g. concrete work, masonry, painting, sandblasting) the
valve must be covered effectively.
1.2.5 Working conditions for operators (except
for valves for buried service)
Take care that there is sufficient space available for operation,
mounting and maintenance work. Access to this valve must be
provided in such a way that this work can be carried out by using the
appropriate technical means (tools, measuring instruments, etc.)
The operator should not work directly above the valve to prevent
personal injury.
The user must provide adequate instructions in order to ensure
that the working area is clean and suitably arranged.
WARNING
Observe the applicable rules concerning
safety, and wear the necessary personal
protective equipment. Risk of injury!
1.2.6 Safety and protective equipment (graphics)
Use ear muffs and helmet
Use eye protection Use protective gloves
Wear safety boots

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1.2.7 Personal protective equipment
If operating problems or malfunctions can occur at the valve (e.g.
risk caused by substances acting on the valve), the person at risk
– if necessary or specified by rules – must use suitable personal
protective equipment to avert hazards which may arise due to the
valve being pressured with up to 16 bar.
1.2.8 Presentation and explanation of the
danger symbols on the valve
The corresponding pictograms and explanations are included in
the relevant operating instructions specific to the product and/or
in the corresponding danger analysis.
1.2.9 Safety measures during normal
operation
When using the valves, observe the approved technical rules:
- European standards, and regulation in force. For plants which
must be supervised, observe the relevant laws and regulations,
e.g. trading regulations, regulations for prevention of accidents,
steam boiler regulations, regulations for gas mains under
high pressure, regulations for combustible liquids as well as
technical regulation works instructions, etc,
- Law on emissions, technical instructions for protection against
noise, disposal of working media according to Directive of the
Council 75/439/EEC,
- Regulations specific to the country concerning approval for
discharging substances hazardous to water into the collective
sewage water system,
- Water resources laws that are specific to the country,
- Rules for accident prevention that are specific to the country,
- Safety regulations for hydraulic hose pipes.
- European Pressure Equipment Directive 2014/68/EU.
1.2.10 Dangers caused by electric energy
A potential danger may arise when the valve is connected to the
electricity supply.
DANGER
Work at electric installations should
only be carried out by trained
electricians and only when the
current is switched off.
Danger from high electric voltage!
1.2.11 Particularly dangerous places
If the valve has been installed according to the instructions, there
will be no immediate danger.
However, vibration may cause damage to seals and screwed
connections.Asaresult, theflowmedium mayescape! Depending
on the kind of flow medium, there may be a risk of fire or explosion
caused by electric contact, open flame or by smoking. Moreover,
there may be a danger of poisoning (by inhalation - danger to
life!), scalding and biological or microbiological hazards.
1.2.12 Safety instructions concerning
maintenance, repair, trouble shooting
WARNING
Before carrying out work on the
valve, the inspection valve must be
closed and the pipe section must be
depressurised.
1.2.13 Modification of valve design
Prior to any change to the design by the user, the manufacturer's
approval must be obtained. Otherwise, the warranty becomes
void.
1.2.14 Valve cleaning and waste disposal
for environmental protection (flow media and
lubricating agents)
The valve can be cleaned with water and soap at a max.
temperature of 40°C.
When using high-pressure cleaning devices, maintain a
minimum distance of 30 cm between the nozzle and the surface
to be cleaned at 100 bars.
For disposal of flow media and lubricating agents, see operating
instructions specific to the product.
1.2.15 Noise level at the valve
Unacceptable noise at the valve only occurs if the given operating
conditions are out of control (cavitation or water hammer)
1.2.16 Emissions (radiation, dust, etc.)
Depending on the flow medium, danger may arise during
dismantling or maintenance. The user must make sure that the
corresponding substances can be collected and/or removed by
suction.

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INFINITY PE BARE SHAFT FOR MANUAL OPERATION
Series 0140160
PE pipe ends according to EN 12201-1 & 2.
2 - PRODUCT AND FUNCTIONAL
DESCRIPTION
2.1 Product description
INFINITY are resilient-seated gate valves for "OPEN - CLOSED" operation only. They comply with the European standard EN1171
(category 3) and EN1074-2 (annex A).
Series Size
DN valve / OD PE pipe Type of PE pipe PS max
in bar
PFA
in bar
PMA
in bar
PEA
in bar
Hydrostatic test
pressure in bar for
Allowable operating
pressure in bar at
Working
temperature max
of 50°C
EN12201-1 & 2 EN1171 EN1074-2 Body Seal
0140160
40/50, 50/63, 65/75,
80/90, 100/110,
100/125, 125/140,
150/160, 150/180,
200/200, 200/225,
250/250, 300/315
SDR17
SDR11
10
16
10
16
12
20
17
25
17
25
11
17,6
10
16
Each product are individually tested on production line before delivery. The strength and tightness of the gate valves are tested in the
manufacturing factory according to EN 12266 and EN 1074-2.

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Components Standard Material Optional Material
Body Ductile cast iron EN-GJS-500-7
Bonnet Ductile cast iron EN-GJS-500-7
Wedge Ductile cast iron EN-GJS-500-7
Wedge elastomer EPDM NBR
Wedge nut Brass CW617N Aluminium bronze CW307G or DZR brass CZ132
Stem Stainless steel 1.4021 Stainless steel 1.4404 or 1.4057
Stuffing nut up to DN300 : Aluminium bronze CW307G
above DN300 : Plastic POM
Bolts Steel with geomet coating Stainless steel A4
Coating Epoxy Enamel
Pe pipe Polyethylen according to EN 12201-1 & 2.
2.2 Functional description and allowable operation
Operation of each gate valve is performed through
rotating motion of the stem with an appropriate operating
element (Handwheel, T-Key,…). The appropriate operating
element should only be used for the recommended torque
values according to Table 7, otherwise the valve might be
damaged. When turning the valve stem, the wedge moves
up or downwards, along the threaded part of the stem,
in order to open or close the passage. The use of "Ring
key and bar", as defined in BS5163 / EN1074-2 / EN1171
standards, is strictly prohibited on this type of product.
Depending regions, countries or customers, the valve is
closed by turning the operating element:
- To the right, i.e. in a clockwise direction.
- To the left, i.e. in an anti-clockwise direction.
In all cases, the closing direction is indicated on the valves.
Regarding square cap tops, a cap plug (1), inserted inside,
indicates the closing direction. Blue color for clockwise
closing direction, red color for anticlockwise closing
direction.
Handwheel 1
Captop (square cap)
Stem
Bolts
Stuffing nut
Wedge nut
Bonnet
Body
Vulcanised wedge
PE pipe
up to DN300
Telescopic or
fix extension
set
Fix
extension
stem
Operating Key

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2.3 Dimensions
Figure 1: Drawings DN40 to 300
Table 1: Dimensions DN40 to 300
*All gate valves with PE ends are reduced bore.
DN*
MAXIMUM WORKING PRESSURE OF 16 BAR (PFA16) MAXIMUM WORKING PRESSURE OF 10 BAR (PFA10)
PE PIPE
ød / SDR
s
(mm)
L
(mm)
L1
xød
P
(mm)
C
(mm)
H
(mm)
h
(mm)
d1
(mm)
PE PIPE
ød / SDR
s
(mm)
L
(mm)
L1
xød
P
(mm)
C
(mm)
H
(mm)
h
(mm)
d1
(mm)
40 ø50 / SDR11 4,6 880 215 105 64 170 46 28
50 ø63 / SDR11 5,8 880 220 110 64 184,5 60 38 ø63 / SDR17 3,7 880 220 110 64 184,5 60 38
65 ø75 / SDR11 6,8 900 230 120 74 227 68 47,5 ø75 / SDR17 4,5 900 230 120 74 227 68 47,5
80 ø90 / SDR11 8,2 900 237 127 79 250 75 60 ø90 / SDR17 5,3 900 237 127 79 250 75 60
100 ø110 / SDR11 10 900 310 154 82 287 91 74,5 ø110 / SDR17 6,5 900 310 154 94 287 97 82
100 ø125 / SDR11 11,4 975 310 154 94 287 97 82 ø125 / SDR17 7,4 975 310 154 94 287 97 82
125 ø140 / SDR11 12,8 1000 350 170 97 324 105 98 ø140 / SDR17 8,3 1000 350 170 97 324 105 98
150 ø160 / SDR11 14,6 1100 381 171 102 368 127 117 ø160 / SDR17 9,5 1100 381 171 102 368 130 129
150 ø180 / SDR11 16,4 1100 381 171 102 368 130 129 ø180 / SDR17 10,6 1100 381 171 102 368 130 129
200 ø200 / SDR11 18,2 1100 464 244 160 450 162 146 ø200 / SDR17 11,8 1100 464 244 160 450 162 146
200 ø225 / SDR11 20,5 1100 464 244 160 450 167 166 ø225 / SDR17 13,3 1100 464 244 160 450 167 166
250 ø250 / SDR11 22,8 1350 500 280 160 546 192 186 ø250 / SDR17 14,8 1350 500 280 160 546 192 186
300 ø315 / SDR11 28,7 1350 500 280 160 621 240 240 ø315 / SDR17 18,6 1350 500 280 160 621 240 240
Square cap is optional
d1

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2.4 Intended use
INFINITY are resilient-seated gate valves for "OPEN - CLOSED"
operation only.
By virtue of its design, and its different material options, INFINITY
might be used:
- with EPDM elastomer: for potable water (only if material is
approved according to water regulation of the country), water,
raw water, sea water, and waste water without grease or oil.
- with NBR elastomer: for water, raw water, sea water, sewage
water containing grease and oil, raw water, cooling water,
potable water (only if material approved according to water
regulation of the country) and to some extent weak acids and
alkalis (compatibility must be checked case by case with our
technical department).
Before installation, check configuration of the material in order
to control the compatibility of the valve with the fluid that is going
to flow inside and external environment.
If used with technically clean fluids (e.g. drinking water,
depending on allowable operating pressure) flow speeds up to
5 m/s are allowed (see table 3 for limits), when the wedge is
in fully opened position. They can be implemented in both flow
directions.
Temperature of the medium shall not exceed max. 50°C (see
table 2 for limits).
European Standard
EN1074-2
European Standard
EN1171
Maximum
Temperature 50°C 50°C
Maximum Flow
Velocity
3 m/s (PFA10)
4 m/s (PFA16)
5 m/s (PN10)
5 m/s (PN16)
Installation condition can be outdoors, buried in the ground,
in valves‘ room, or in buildings.
All deviating operating instructions and deviating fields of
application are subject to the manufacturer’s approval.
As we do not have any control or prior knowledge of the quality
and properties of the water, we recommend the installation of
INFINITY gate valves with enamel coating when the water tends
to form deposits or encrustations.
2.5 Unacceptable operation
Do not use the valves for regulating mode. Continuous operation
in the flow-restricting position causes increased wear. This type
of gate valves is suitable only for “OPEN-CLOSED” operation.
Special types of valves are to be used for typically controlled
operation.
Negative pressure levels (cavitation) are to be avoided at all
events.
Extending the operating elements, e.g. with levers or similar
devices is not allowed.
Do not exceed temperature limits for the flow media.
Do not exceed allowable operating pressure. The closed valve
may only be loaded up to the allowable operating pressure.
If INFINITY gate valves are equipped with an EPDM seal, the
EPDM parts must not be allowed to come into contact with any
medium containing oil or grease, as EPDM swells.
Whatever the materials that constitute it, it is absolutely
forbidden to use INFINITY with gaseous fluids such as propane,
butane, natural gas or with hydrocarbon fluids like petrol, diesel,
etc.
In some applications, risk of burns
due to hot flow medium can occur;
install thermal gate valve insulation
on site.
2.6 Marking
The following information is casted into the body:
- Manufacturer name,
- DN,
- PN,
- Cast material.
The following information is shown on additional labels:
- Name of the range,
- Product number,
- Barcode,
- Operation direction if anti-clockwise closing direction,
- Approvals (if any),
- Date of manufacturing,
- Standard reference: EN1074-2, EN1171.
- Type of rubber in direct contact with the fluid.
Table 2: Maximum temperature and flow velocity

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3 -TRANSPORT,
HANDLING AND
LIFTING
Valve must be transported in the proper packaging to guarantee
protection against external damage and bad weather. In case of
severe climate conditions, special plastic sealed packaging with
desiccant products must be used.
Transport must be carried out carefully in order to avoid shock
and any kind of damage, especially to the coating. Careless
handling may cause damage to the valve. Prior to mounting,
such damage is to be repaired in an appropriate manner.
During the transport, the valve shall be slightly open in order to
avoid unnecessary stress to the elastomer of the wedge.
Check the weight in the present document before any operations
(table 3). Valves too heavy to be handled manually must be
transported by means of a lifting device suitable for the weight
involved (e.g. broad belts). Avoid use of chains and ropes in order
to protect the valves from coating damage. The lifting device must
be placed around the body (e.g. not on the PE pipes), respecting
the center of gravity. Valves with eyebolts, lifting ring or lugs
must be suspended by these devices in an appropriate manner.
It is forbidden to attach the lifting gear to the handwheel, the
stem, the gearbox casing or on the PE pipes as this would be
contrary to the relevant safety regulations.
DN MAXIMUM WORKING PRESSURE OF 16 BAR (PFA16) Weight F5/Long body (in Kg)
PE PIPE
ød / SDR
Weight
(kg)
PE PIPE
ød / SDR
Weight
(kg)
40 ø50 / SDR11 11,5
50 ø63 / SDR11 14 ø63 / SDR17 14
65 ø75 / SDR11 15 ø75 / SDR17 15
80 ø90 / SDR11 18 ø90 / SDR17 18
100 ø110 / SDR11 21,5 ø110 / SDR17 21,5
100 ø125 / SDR11 21,5 ø125 / SDR17 21,5
125 ø140 / SDR11 27 ø140 / SDR17 27
150 ø160 / SDR11 32 ø160 / SDR17 32
150 ø180 / SDR11 32 ø180 / SDR17 32
200 ø200 / SDR11 41,5 ø200 / SDR17 41,5
200 ø225 / SDR11 41,5 ø225 / SDR17 41,5
250 ø250 / SDR11 43 ø250 / SDR17 43
300 ø315 / SDR11 51 ø315 / SDR17 51
Table 3: weight of the gate valve bare shaft
WARNING
Follow the applicable safety
regulations and wear the required
personal protective equipment.
Risk of injury!
WARNING
Failure to use suitable load carrying
devices for transport and installation
of gate valves can cause health
damage.

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4 - STORAGE
The valve should be stored in a location that protects the valve from any
pollution or contamination. Do not store the valves outdoors. During the
storage period, the valves must be protected (e.g. by covering them with
a tarpaulin) against outside influences and impurities like:
- Humidity and rain, to avoid corrosion,
- Wind and sand, to avoid the penetration of solid particles that could
damage the guiding area and seat,
- Sunshine and heat, to prevent oxidation of the elastomer and coating
due by ultraviolet light.
Take into account also that long storage under severe conditions can
cause damage to the coating, elastomer and seals.
Leave the wedge slightly open in order to avoid long term compression
of the elastomer. If it is closed completely, the rubber suffers an
unnecessary compression.
Take care to not damage the coating. Ensure that the valve is stored in a
stable position. Store valves standing on their feet. Store valves without feet,
flat on their connecting flange by means of intermediate protecting boards.
If long-time storage is required, the place of storage should be selected
in such a way that the following conditions are met: frost-protected -
cool - dry - dust-free - dark (for elastomer UV-light is inadmissible). If it
is impossible to comply with these conditions, the valves must be packed
to meet the above mentioned requirements (e.g. they must be sealed
inside dark plastic sheets).
The protective PE pipe covers or packing should be kept up to the
assembly phase.
The valves are designed for a storage temperature of – 20°C to +50°C.
5 - INSTALLATION
INTO THE PIPELINE
5.1 Location of installation
Warning! After installation, it is important that all around the valve there
is free access for operation and maintenance.
If the valve is installed outdoors, protect the valves on site against direct
exposure to weather conditions and also against frozen conditions.
5.2 Assembly positions
Our resilient seated gate valves are watertight in both directions, there
are no preferential directions for installation. For clean media, we
recommend the position describe in figure 2.
For other assembly positions, the manufacturer will not be able to
guarantee proper operation of the valve.
5.3 Installation
Prior to installation:
- Remove all packing material from the valve, as well as the protective
covers of the PE pipes.
- Check configuration of the material in order to control the compatibility
of the valve with the fluid that is going to flow inside and the external
environment.
- By turning the operating stem, open the valve to check its integrity
(valve’s seat area) and ensure that it works properly. If it does not, or if
any damage is observed, inform us immediately.
- While the valve is open, clean off any dirt which may have settled on the
sealing surface during transport or storage. Check if there are foreign
bodies that could prevent correct operation.
- Check the pipeline for impurities and foreign matter and clean it if
necessary.
- Check that the PE ends of the valve are compatible with the PE pipes on
which the valve will be connected.
- Check that the valve with PE ends are fully alined on both sides with the
PE pipes. No anglular deflection can be tolerate.
- Before installation of the valve, make sure that the distance between the
pipe flanges exceeds the valve face-to-face dimension in order to ensure
proper distance for assembly operation by mirror butt welding or with
electrofusion fittings.
- Should the valve be installed in a pedestrian area, there is a risk of
stumbling. The valve or the pipeline area must be secured by appropriate
means.
The assembly of the valve in the pipe is independent of the flow direction.
When connecting the valve to the pipe, avoid the transmission of stresses
from the pipe to the valve body. Any pipe or pipe sections or valves not
yet finally clamped in place, must be provisionally supported to prevent
abnormal stress on one or both sides of the valve.
In some configurations, for valves of larger nominal sizes, robust stability
has to be ensured, by external support if necessary. It may be necessary
to provide supports to the valve if the weight of the latter exerts excessive
stress on the piping.
In any case, the pipeline mustn't by any means be pulled to the valve.
Once the valve is assembled, the threads of the bolts/rods should be
greased with a brush or spray. MOLYCOTE or a similar graphite based
waterproof grease should be used to prevent corrosion and facilitate
subsequent dismantling operations.
The connection with INFINITY PE can be done through two different
methods:
- But welding with heating mirror,
- Use of electrofusion fittings.
In both case, for the connection implementation, we recommend to
strictly follow the instruction given by the manufacturers of these two
different methods in their respective IOM manual.
Figure 2: positions
From DN40 up to DN300:
1) Ideal position: vertical stem, horizontal flow

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6 - COMMISSIONING
AND OPERATION
Before the valve is commissioned and installed, it must be subject to
visual check, and more particularly that all connections have been done
properly.
Each valve must be operated in respect of the operating torque by means
of an appropriate operating element: handwheel or square cap top. In the
latter case, a purpose-designed operating key must be used.
Dimension of the handwheel or operating T key should be compatible
with the maximum operating torque (MOT) required. If it is not possible,
a torque limiting device will have to equip the operating tool in order to
avoid over torque on the valve. According to EN standards, you will find
in the table below the Maximum Operating Torque (MOT) and Minimum
Strength Torque (MST) in Nm for gate valves to be operated by handwheel
or T-Key (see table 4). Operation by "Ring key and bar" is strictly prohibited.
After closing or opening operation, the valve must be:
- fully open and the stem released from stress
- or fully closed with at maximum the MOT stated in the table.
The nominal pressure in the pipeline should not exceed the allowable
operating pressure that the valve can support.
Flush the newly installed piping systems in order to evacuate
all foreign matter (residues or dirt in the piping might affect the
operation of the Valve or even block it).
Take care to not affect valve materials when using cleaning /
disinfecting products. After installation, perform a pressure test
before the trench is closed.
DN/OD PE
PIPE
(in mm)
Normal
Closing
Torque(2)
(in Nm)
Maximum
Operating
Torque (MOT)
according to
EN1074-2(1)
(in Nm)
Minimum
Strength
Torque (MST)
according to
EN1171(1)
(Nm)
Number of
turns for
Opening or
Closing
(full stroke)
40/50 30 40 180 11,5
50/63 30 50 180 14
65/75 40 65 300(3) 15
80/90 60 80 300(3) 18
100/110 70 100 300 21,5
100/125 70 100 300 21,5
125/140 70 125 375 27
150/160 90 150 450 32
150/180 90 150 450 32
200/200 120 200 600 41,5
200/225 120 200 600 41,5
250/250 180 250 750 43
300/315 200 300 900 51
(1) For gate valves to be operated by Handwheel or T-Key, "Ring key and bar" excluded.
(2) The values are the normal closing torque values of our resilient seated gate valves with clean water and at room
temperature, for a product delivered.
They are given for information and can vary depending on the typical manufacturing variables. For other fluids and
temperature please contact us.
(3) Values from NF197 quality mark (exceeds values from EN1171).
Table 4: torques and number of turns
7 - MAINTENANCE
7.1 Maintenance recommendations
If they are used correctly, INFINITY gate valves are maintenance-free.
However, the performance and operating conditions of parts of the
system must be checked at regular intervals. The function, and tightness
at MOT values should be regularly monitored with a maximum interval of
one (1) year as described:
• Visual inspection to the maximum extent.
• Functional inspection by opening and closing the valve over entire stroke.
• Check for smooth operation and tightness at MOT values maximum.
If the torque necessary to close or open the valves are above MOT values,
a proper maintenance must be done including changes of the damaged
components.
The operating/mantenance visits must be increased to an adapted frequency
if the gate valves are used with water that tends to form deposits (limestone,
etc) and incrustations, or in the case of: highly abrasive mediums, strong
hydraulic demands, strong environmental variations, sewage or industrial
applications.
Lubricant/grease must be approved for potable water application, and must
be appropriate to the functions it must fulfill. Recommended lubricants for
all type of maintenance (see paragraph 7.3) and for flow medium water are:
Klüber Unisilikon L641 for wedge nut, stem bearing and O-rings, or Klüber
Synth VT 69-252 for wedge guide, wedge nut, stem bearing and O-rings.
If silicone-free lubricant is requested, then we recommend only Klüber
Synth VR 69-252 as unique grease.
DANGER
If harmful liquids, substances, gases or vapours
escape, the plant must be immediately shut down,
the responsible supervisor informed and appropriate
repair work carried out.
Personal protective equipment must be used
according to the health & safety regulations of the
country concerned.
Depending on the flow medium, there is a risk
of poisoning and contamination, caustic burns,
scalds, harm due to biological and microbiological
substances as well as a fire and explosion hazard !
WARNING
Before starting the maintenance work, all
pressurised pipes must be depressurised and
secured against being switched back on again!
In the event of leakage at the top of the bonnet
around the stem, stop operating the valve, consult
paragraph 7.2 (Trouble shooting guide) and follow
the instructions before any other operation.
After completing the maintenance work, check all
connections for tightness and secure fit before the
new commissioning.
WARNING
Excessive torque may damage the valve body and result
in uncontrolled water leakage of up to 16 bar. In this case,
further work on the valve must be stopped immediately
and a safe distance to the valve must be maintained,
especially directly above the valve. Otherwise the valve
stem may come loose when the closing mechanism is
actuated further and escape together with pressured
water up to 16 bar.
If the torque necessary to close a valve is above MOT
values, plan a maintenance phase on the valve.
In case of over torque applied on the valve, a proper
maintenance must be done including changes of the
damaged components.
After installation into the pipeline, ensure the easy operation
of the valve several times by moving it over the whole stroke
(OPEN – CLOSED) by means of the operating element (see table 4).

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7.2 Trouble shooting guide
Table 5: Trouble shooting guide
TROUBLE ROOT CAUSE SOLUTION
Leakage at the top of the bonnet around the
stem
Stuffing nut in wrong position
Stop to operate the valve and change the
complete Bonnet
(see the paragraph 7.3.1)
Defective Stuffing nut
Stop to operate the valve and change the
complete Bonnet
(see the paragraph 7.3.1)
Defective O-rings Change O-rings
(see the paragraph 7.3.2)
Leakage between the bonnet and the body Defective gasket Change the gasket between body and bonnet
(see the paragraph 7.3.4)
The valve is not closing
Defective wedge nut or wedge Replace wedge nut or wedge
(see the paragraph 7.3.4)
Foreign body under the wedge Remove the foreign body
Curved operating stem Replace operating stem
(see the paragraph 7.3.3)
Large deposits and incrustations in the guiding
areas Clean the guiding area
Stuffing nut in wrong position
Stop to operate the valve and change the
complete Bonnet
(see the paragraph 7.3.1)
Defective Stuffing nut
Stop to operate the valve and change the
complete Bonnet
(see the paragraph 7.3.1)
The valve is not opening
Defective wedge nut or wedge Replace wedge nut or wedge
(see the paragraph 7.3.4)
Foreign body blocking the wedge Remove the foreign body
Curved operating stem Replace operating stem
(see the paragraph 7.3.3)
Large deposits and incrustations in the guiding
areas Clean the guiding area
Stuffing nut in wrong position
Stop to operate the valve and change the
complete Bonnet
(see the paragraph 7.3.1)
Defective Stuffing nut
Stop to operate the valve and change the
complete Bonnet
(see the paragraph 7.3.1)
7.3 Replacement
5
2
3
13
7
6
up to DN300
WARNING
Excessive torque may damage the valve body and result in uncontrolled water leakage of up to 16 bar. In this case, further work on the
valve must be stopped immediately and a safe distance to the valve must be maintained, especially directly above the valve. Otherwise
the valve stem may come loose when the closing mechanism is actuated further and escape together with pressured water up to 16 bar.

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The technical data and performance may be modified
without prior notice depending on the technical advances.
7.3.1 Replace complete bonnet (spare kit
including bonnet with packing and stem):
1Isolate the network section where the valve is installed
(upstream and downstream).
2Depressurize the network section where the valve is
installed and the gate valve.
3Open slightly the gate valve.
4Release the handwheel or square cap from its anchor
point by loosening the screw holding it down.
5Remove hot melt glue's cap with a screwdriver and
carefully unscrew the bolts (13) with hex key.
6Remove bonnet (2).
7Remove the wedge (3) together with the wedge nut (6)
from the stem and tread it in the new spare kit Bonnet.
8Replace the body/bonnet gasket (7). The body/bonnet
gasket (7) shall be positioned in the bonnet (2) hold by the
bolts (13), not in the body surface, to ensure it is not pinched.
9Lubricate the stem (5) and wedge nut (6), body/bonnet
gasket (7) and wedge (3) sealing face with a small amount of
appropriate grease (see in the paragraph 7.1).
10 Re assemble the valve by threading the bolts in cross
• Screw all the bolts in the order described on figure 3
without tightening them.
• Tighten the bolts in the order shown on figure 3, with the
recommended torques given in the table 6.
INFINITY gate valves are maintenance free. In the event that it is necessary to replace any part of the valve, follow these instructions.
Starting from the upper side of the valve:
up to DN300
5
9
14
22
10
8
12
11
DN Bolts Type Recommended
Torques*
40 to 150 M10 70 Nm
200 to 300 M12 110 Nm
DN40/50 DN65/80/100/125
DN150 DN200/250/300
7.3.2 Replace stem seals (can be replaced
under pressure with the valve fully opened):
1Check that the valve is fully opened,
2Release the handwheel or square cap from its anchor point
by loosening the screw holding it down,
3Remove dust guard (14),
4Up to DN300: Use a screwdriver to pull the 3 plastic locking
tabs (22) out of their position between the bearing bush and
Table 6: Recommended torques for the bonnet bolts
(*): for Stainless Steel A4-80 and Steel 12.9 with geomet coating.
Figure 3: Assembly order for body/bonnet bolts
WARNING
Excessive torque may damage the valve body and
result in uncontrolled water leakage of up to 16
bar. In this case, further work on the valve must
be stopped immediately and a safe distance to the
valve must be maintained, especially directly above
the valve. Otherwise the valve stem may come loose
when the closing mechanism is actuated further and
escape together with pressured water up to 16 bar.

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bonnet. These 3 plastic locking tabs must be discarded and
replaced by 3 new ones.
5Up to DN300: The stuffing nut (10) is unlocked by pushing it
downwards while at the same time turning it 1/4 turn. Then, it
can be pulled off from above. The parts to be replaced are:
- The two O-rings (11) inside this stuffing nut. Remove them with
a punch or screwdriver, taking care not to damage the housings,
and fit a new set. Lubricate the O-rings with a small amount of
appropriate grease.
- The O-ring (12) under the stuffing nut, between the stuffing
nut and the bonnet. When replaced, this O-ring must lie in the
shoulder provided cleanly against the outer diameter. Lubricate
the O-ring with a small amount of appropriate grease.
- The 3 plastic locking tabs (22).
6Re-assemble the valve, repeating these operations in reverse
order.
7.3.3 Replace all stem seals and bearings:
1Isolate the network section where the valve is installed
(upstream and downstream)
2Depressurize the network section where the valve is installed
and the gate valve
3Slightly open the gate valve,
4Release the handwheel or square cap from its anchor point
by loosening the screw holding it down
5Remove dust guard (14)
6Up to DN300: Use a screwdriver to pull the 3 plastic locking
tabs (22) out of their position between the bearing bush and
bonnet. These 3 plastic locking tabs must be discarded and
replaced by 3 new ones.
7Up to DN300: The stuffing nut (10) is unlocked by pushing it
downwards while at the same time turning it 1/4 turn. Then, it
can be pulled off from above. Remove the stem (5), taking care
not to remove the wedge nut (6) from its housing, and extract the
plastic washer (8). The parts to be replaced are:
- The two O-rings (11) inside this stuffing nut. Remove them with
a punch or screwdriver, taking care not to damage the housings,
and fit a new set. Lubricate the O-rings with a small amount of
appropriate grease.
- The O-ring (12) underneath the stuffing nut, between the stuffing
nut and the bonnet. When replaced, this O-ring must lie in the
shoulder provided cleanly against the outer diameter. Lubricate
the O-ring with a small amount of appropriate grease.
- The O-ring (9) on the stem, below the thrust-bearing collar.
Remove them with a punch or screwdriver, taking care not to
damage the housings, and fit a new set. Lubricate the O-ring
with a small amount of appropriate grease.
- The plastic washer (8) below the thrust-bearing collar. Lubricate
the plastic washer with a small amount of appropriate grease.
- The 3 plastic locking tabs (22).
8Re-assemble the valve, repeating these operations in reverse
order.
7.3.4 Replace wedge or wedge nut or gasket
between Body-Bonnet:
1Isolate the network section where the valve is installed
(upstream and downstream),
2Depressurize the network section where the valve is
installed and the gate valve,
3Open slightly the gate valve,
4Release the hand wheel or square cap from its anchor point
by loosening the screw holding it down,
5Remove hot melt glue's cap with a screwdriver and carefully
unscrew the bolts (13) with hex key,
6Remove bonnet (2).
7Replace damaged wedge (3) and/or wedge nut (6) and in all
cases the body/bonnet gasket (7). The body/bonnet gasket (7)
shall be positioned in the bonnet (2) hold by the bolts (13), not in
the body surface, to ensure it is not pinched.
8Lubricate the stem (5) and wedge nut (6), body/bonnet
gasket (7) and wedge (3) sealing face with a small amount of
appropriate grease (see in the paragraph 7.1).
9To re-assemble the valve, repeating these operations in
reverse order. Re-assemble the bonnet (2) on the body by
threading the bolts (13) in cross
• Screw all the bolts in the order described on figure 3 without
tightening them.
• Tighten the bolts in the order shown on the on figure 3 below,
with the recommended torques given in the table 6.
7.4 Spare parts
7.4.1 INFINITY gate valves DN40 to DN300
ITEM*DESCRIPTION Qty COMMENTS
3Wedge 1Specify type of elastomer
and DN
5Stem 1Specify type of material
and DN
6Wedge nut 1Specify type of material
and DN
7Body-Bonnet gasket 1Specify type of elastomer
and DN
8Plastic washer (Stem) 1Specify DN
9O-ring (Stem) 1Specify type of elastomer
and DN
10 Stuffing nut 1Specify DN
11 O-ring (Inside stuffing nut) 2Specify DN
12 O-ring (Outside stuffing nut) 1Specify DN
13 Bolts (Bonnet) Acc/DN Specify type of material
and DN
14 Dust guard 1Specify DN
22 Plastic locking tab 3Specify DN
Note: Items in the table above can't be sold individually, but are sold in the form of non dissociable kits. The
table above is only dedicated to identify the necessary components. For more details about the constitution
of kits, please contact us.
(*)See illustrations in section 7.3 for items numbers.

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Table 7: Head loss coefficient
DN (in mm) Kv*
40 270
50 450
65 760
80 1160
100 1910
125 3140
150 4580
200 8260
250 13730
300 19400
(*) Theoretical values. These Kv values concern flanged valves. They are given for information only.
8 - HYDRAULIC
CHARACTERISTICS
At a temperature of 20°C, the head loss through the valves are
defined by the following formula:
∆P
Q
Kv
2
(
(
=
With: ∆P = head loss of the valve in Bar,
Q = flow in the valve in m3/h,
Kv = head loss coefficient. See value by DN in the
table below. “Kv” express the value of the flow (in m3/h), at a
temperature of 20°C, that pass through the valve by generating a
head loss of 1 Bar.
9 - CE MARKING
European directive 2014/68/EU (PED) must be respected in all the
countries of the European Union for all equipment under pressure.
Valves which are subjected to this European directive are the object
of a "CE" marking and also a CE declaration of conformity.
Are excluded from the scope of this directive the networks for
the supply, distribution and discharge of water and associated
equipment and headraces such as penstocks, pressure tunnels,
pressure shafts for hydroelectric installations and their related
specific accessories. In this context:
(*) according to the max working pressure defined, max temperature defined, and fluid group defined, the
“CE marking” is not necessary for DN40 to 300 in the present case.
Table 8: Category according to European directive 2014/68/EU (PED)
DN PS
MAX
(bar)
Fluid
group
Fluid Type CATEGORY CE
MARKING
40 16 2
Liquid
having
vapor
pressure
max at
1513 mbar,
at 70°C
max.
Art 4, Par 3 n.a.*
50 16 2Art 4, Par 3 n.a.*
60 16 2Art 4, Par 3 n.a.*
65 16 2Art 4, Par 3 n.a.*
80 16 2Art 4, Par 3 n.a.*
100 16 2Art 4, Par 3 n.a.*
125 16 2Art 4, Par 3 n.a.*
150 16 2Art 4, Par 3 n.a.*
200 16 2Art 4, Par 3 n.a.*
250 16 2Art 4, Par 3 n.a.*
300 16 2Art 4, Par 3 n.a.*
TALIS Management Holding
Postfach 1280
D-89502 Heidenheim
Meeboldstraße 22
D-89522 Heidenheim
Telefon: [phone]
Telefax: [phone]
[e-mail]
www.talis-group.com
- “water” means: potable water, waste water and effluent, and
sewage,
- “Networks and associated equipment” means: complete systems
for the supply distribution and discharge of water. They extend
up to the point of use in buildings, industrial sites and plants,
and include equipment closely related to these networks such as
water meter and line valves. Pressure vessels, such as expansion
vessels, however are not considered to be part of such ‘networks
and associated equipment’ and are therefore not excluded.
Within the scope of the directive, the requirements on resilient seated
gate valves are given in the table below in the case of liquid from
group 2. For the gate valves which are subjected to “CE” marking
(see table below), the document of “CE” declaration of conformity is
available on request.
10 - AFTER SALES
SERVICE CONTACT
For technical assistance, or all questions that concerns
the product or IOM manual, please find the details of your
closest contact on www.talis-group.com or send an email to
[e-mail].

TALIS is the undisputed Number One for water transport and water flow
control. TALIS has the best solutions available in the fields of water and
energy management as well as for industrial and communal applications.
We have numerous products for comprehensive solutions for the whole
water cycle – from hydrants, butterfly valves and knife gate valves through
to needle valves. Our experience, innovative technology, global expertise
and individual consultation processes form the basis for developing long-
term solutions for the efficient treatment of the vitally important resource
“water”.
www.talis-group.com
Note: Information and specifications may be changed without notification at any time.
Copyright: No copying without express written permission of TALIS
TALIS is a Registered Trademark. BA27E016. REV. 1 (03/20)
IOM_RGV20191216A_INFINITY PE_EN
ERHARD GmbH & Co. KG
Meeboldstraße 22
D-89522 Heidenheim
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