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Type LTR 43Operating and service instructions forTriple offset
control butterfly valvesNominal diameter NPS 3 - 100 / DN 80 - DN
2500Nominal pressure ANSI Class 150 - 2500 / PN 10 - PN 400
Your specialist for triple offset butterfly valves
Safety instructions
ATTENTION! LEUSCH valves may only be mounted, put into
operationand maintained by specialist and trained personnel in
compliance withrecognised technical rules as well as additional
regulations of the coun-try/location of destination, as
applicable.It should be ensured that employees and third parties
are not endangeredduring any work.ATTENTION: DANGER TO LIFE! When
the valve is fitted with an actuator(e.g. pneumatic, electrical or
hydraulic) the following applies: Do not putany parts of your body
/ limbs inside the valve when an actuator is in-stalled.
Sudden/unexpected moving parts (e.g. through acting spring
actu-ating forces) can cause life-threatening injuries.During all
installation work on the valve, it should be ensured that thevalve
is de-pressurised along with all actuators and accessories or
adja-cent pipelines, if applicable.
2017-01
Table of contents
Safety regulations
..............................................1
Instructions, intended usage ..............................2
Transport, storage and handling.........................3
Installation
.........................................................3
Commissioning, operation, de-commissioning ....4
Function
............................................................5
Maintenance and adjustment .............................5
Position Indicator and key direction ....................7
Installing the actuator
.........................................7
Replacement of the Gland Packing ....................8
Replacement of the Cover Seal..........................9
Replacement of the Seating System ................10
Labelling
..........................................................11
Disposal
..........................................................11
Service
.......................................................11-12
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2
Instructions are marked by use of symbols in .
Absolute prohibitionmust be followed !
Risk / Beware / Warningdraws attention to dangeroussituations
that can lead to death or serious person-al injuries and/or damage
to the pipe system.
Instructionspoints to instructions that must be absolutely
fol-lowed
Informationgives useful tips and recommendations.
LEUSCH valves are designed in accordance with
applicablestandards in compliance with technical regulations (e.g.
AD-2000 regulations) and the European Directive for
PressureEquipment 2014/68/EU.For intended usage it should be
ensured that the valves areonly used where the operating pressure
and temperatures donot exceed the design criteria specified for the
order. Themanufacturer is not responsible for damages arising
fromexternal forces or other external influences! Risks which
arisefrom the process medium, operating pressure and tempera-tures,
as well as from the signal pressure or from movingparts of the
valve, should be prevented by suitable measures.The following must
be ensured for the intended usage of thedevices:
Implementation and operation of the valves inpipelines within
predefined (materialdependent)pressure and temperature limits (see
informationsfor PS and TS on the name-plate) for control
andshutting-off of the fluid by means of manual gear-box or by
means of a actuator (pneumatic,electric or hydraulic).
When Valve is to be used as End-Valve, the oper-ating and
ambient conditions must first be clarifiedwith the
manufacturer.Valves with wafer body are designed only
forinstallation between two mating flanges and there-fore not
suitable for use as End-Valve.
Installation and operation of the valves with re-spect to no
additional adverse effects such aspipeline forces, wind loads,
vibrations (also earth-quakes), corrosion, fire or decomposition of
unsta-ble fluids.The plant designer/operator is responsible for
takingrelevant measures to prevent additional loads andinfluences
and therefore possible risks to the valvesand the environment, as
appropriate. Suchmeasures could be, for example:
Construction of load restraints and vibrationdampersMeasures for
safe drainage or redirection ofdangerous mediums (from external
leaks)Measures for process safety when auxiliaryenergies fail (e.g.
consideration of fail-safe posi-tions)Correct storage and transport
of the valves (e.g.dry storage, use of suitable sling materials
etc.)
Use of the valves with fluids that the select-ed materials are
sufficiently resistant to.The fluid compatibility of the valves (in
regardto the materials used including the sealingmaterials) is to
be checked by the plant de-signer /operator for all operating
conditions.Temperature change as well as applicableuse of future
detergent must also be takeninto consideration.Measures to ensure
the fluid compatibilityby the plant designer /operator could be,
forexample:
• Specification of suitable materials• Specification of
protective coatings• Creation of (special) specifications
Specification of the flow velocity depending onmedium as well as
the use of the valves, sothat no damage can occur to the valve and
thepipeline.
CEFor valves with CE labelling (CE name-plate)the conformity in
accordance with EuropeanDirective for Pressure Equipment
2014/68/EUwill be declared. The conformity declarationgives
information about the conformity assess-
In addition, the same safety regulations apply forvalves as for
the pipeline system in which theyare installed.The safety
regulations of the attached controlsystem for the actuator
including accessoriesare also to be observed, as well as the
instruc-tions and regulations of the individual manufac-turer.
Further safety instructions that are to be fol-lowed for the
installation, operation and mainte-nance of the valves are
described in the follow-ing chapters.
NACEIn relation to the use or the application of mate-rials in
accordance with NACE MR0175 /ISO15156 as well as NACE MR0103
(Materialsin environments containing H2S), the designa-tion of the
standard itself in the material or testcertificates does not yet
certify suitability for theuse of the valve. This is additionally
dependenton operating and environmental parameters,which are
usually only provided by the plantdesigner. Therefore, the
suitability of such avalve is always to be checked by the plant
de-signer/operator.
SILThe suitability for the use of valves in (SIL)protective
circuits must be documented in spe-cial agreements. The
requirements that are tobe followed are described in standards
(e.g.VD12180, EN 61508) and in the applicableSamson group handbook
(functional safety forEN 61511control valves, rotary plug valves,
ballvalves and butterfly valves; WA 236.
Oxygen serviceDuring ordering of spare-part kits for valvesthat
are used for oxygen service, it is neces-sary to specify explicit
“OXYGENE-SERVICE”.
Instructions, intended usage
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3 Industrial Valves
Check whether the valve was damaged during transport orhandling.
Damage must be notified within 14 days of arrival.The transport
instructions on the packaging (e.g. wooden box)must be followed. It
must be ensured through suitable and ap-proved sling materials and
slings that no damage can occur toconnector surfaces, as well as
preventing other adverse effectson the device (e.g. actuator
accessories, pipeline, sealing ele-ments). The device may not be
lifted up directly on the actuator.A sling should be attached for
larger valves.(Examples are shown in Fig. 1 and Fig. 2)Ensure
storage in the original package in an enclosed area.This is to be
done in a clean and dry environment in compliancewith the
permissible ambient temperatures for the valves.Do not lay the
valve directly on the floor. Suitable supports(e.g. delivery
packaging) should be used to protect the deviceagainst
particles/dirt during storage and installation.Protective enclosure
and packaging should be removed im-mediately before installation of
the valve. This applies particu-larly to special packaging (e.g.
for specially cleaned valves).
Transport, storage and handling
Fig. 1
Installation
ATTENTION: DANGER! Spring-acting actuators may only
bepressurised in assembled condition in the pipeline, and notfor
the purposes of performance of work on the valve outsidethe
pipeline. There is a risk of fatal injury if the auxiliary ener-gy
suddenly fails and the valve disc then moves on its owninto the
fail-safe position as a result of spring decompression.For devices
equipped with a spring return actuator with safetyposition “Open”
(Fail open), the valve disc may possibly needto be closed for
installation in a pipeline. It must be ensuredhere that the full
control pressure for closing the valve is main-tained for the
duration of the installation work. Otherwise, thevalve must be
installed in the open position, e.g. by disman-tling the
pipeline.
1. For installation, it must be ensured that:Sufficient
installation space is availableThe pipeline connectors are well
alignedSuitable installation tools and lifting attachments
areusedPrecautions for the prevention of contact with danger-ous
fluids have been taken.
2. Furthermore, it must be ensured that:Employees or third
parties are not at risk. If applicable,legal regulations of the
country of destination must ad-ditionally be observedIt is
accessible for necessary inspection, and can beobserved from all
sides, if necessaryThe operation of all components is possible from
a safepositionThe name-plate is recognisable.
3. The device is to be connected to the appropriately
designnated supports/connectors. It must be protected
againstexternal mechanical influences to the extent that damage
isnot expected on the device. The preferred flow directionmust be
observed during installation. It points from the shaftaxis in the
direction of the sealing seat and is marked byarrows at the sides
of the valve body.
Fig. 2
Fig. 3
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4
4. The disc should be closed during installation of
thevalve.
5. The following must be ensured for the weldingwork to be
carried out:All welded connecting joints are made andchecked in
accordance with current and recog-nised welding procedures.They are
only carried out by specialist personnelin compliance with the
relevant regulations.Overheating of body and trim is avoided.The
valve is closed to protect sealing elementsfrom welding beads and
dirt.
6. If there is a risk of static charge on the device,the
operator must ensure that a suitableground / earthing connection is
installed to pre-vent this.
7. Butterfly valves in Series LTR43-2, LTR43-5 andLTR43-9 have a
non-continouis sealing surface.In Case of Sealing Surfaces acc to
EN1092-1(B1 and B2 only) and ASME (B16.5 RF andB16.47 RF), please
consider flat Gasket typeacc. To EN 1514-1 and ASME B16.21
respec-tively. For the use of spiral-wound- or
kammpro-file-gaskets, non-standard dimensions have tobe requested
from Leusch GmbH.
General installation instructions:A minimum gap of 5 x pipe
diameter must be kept fromthe next component upstream and
downstream of thevalve (e.g. pump valve or elbow). If it is not
possible tomaintain the prescribed gap due to technical reasons,we
recommend installing the valve in the following posi-tion. The
valve shaft and centre of the elbow cross-section should be
arranged parallel to reduce the dy-namic forces on the disc (Fig.
3).For installation on the pressurised side of a centrifugalpump,
the valve shaft must be arranged at a 90° angleoffset to the pump
shaft (Fig. 3).
Commissioning, operation, de-commissioning
1. Commissioning of the device may only be carriedout once the
operator has ensured that:All installation work has been completed
on thepipeline and the device has been correctly in-stalled in the
system.The pipeline and valve are free of dirt and parti-cles to
ensure faultless functioning (opening/closing). Residue and
operation with fluid thatcontain a high proportion of particles
could leadto functional breakdowns and shortened mainte-nance
intervals. If this is to be expected, addi-tional suitable measures
must be planned for theprevention of faults, if necessary. The
systemshould therefore be thoroughly cleaned beforecommissioning.
If necessary, it is recommendedto remove the valve from the
pipeline and to re-place it with adaptersThe device has been
checked for proper condi-tion in regard to installation and safe
functioning.
2. In particular, it should be checked and ensuredthat:The valve
disc does not collide with the pipelineduring opening/closing.
The parts which come into contact withfluid are suitable for the
planned usage.Actuators and accessories (if available)are connected
in accordance with man-ufacturer's instructions and the
devicefunctions correctly corresponding to thecontrol commands.The
IP and EEx labelling/details arecorrect for electrical
components.The limit values on the name-plate, suchas maximum
permissible pressure PS ofthe valve, minimum/maximum tempera-ture
TS will not be exceeded due to theoperating conditions (P < PS,
TS min. < T< TS max.). In addition, the pressure/temperature
Rating in accordance withEN 12516, EN 1092 or ASME B16.34must be
observed.
3. The operator must operate and monitorthe device using trained
personnel sothat employees and third parties are notendangered. If
applicable, nationallyrelevant regulations of the country
ofdestination should also be observed forthe operation of the
device.
4. Modifications to the factory settings foractuators (e.g.
limit stops) and accesso-ries (e.g. filter regulator, booster) are
notpermitted and may only be carried out inindividual cases with
the approval of themanufacturer by qualified and
specialisedpersonnel.
5. ATTENTION: The valve disc must beopen when performing a
pressure Test ofthe pipeline system. It must be ensuredthat the
maximum permissible pressurefor the valve is not exceeded.
Seals(flange, cover, gland, or extension, if ap-plicable) must be
checked for leakage. Ifthe Packing Gland leaks, the nuts of
thegland should be alternately tightened insmall steps until the
leak is fixed.Never tighten nuts more than necessaryMaximum torques
Page 8 Tab.1.If there is still a leak, the manufacturershould be
contacted.
6. The system is to be started up orstopped so that no
impermissible volt-age increases result from the tempera-ture
rise/fall. The device must be con-stantly observed during starting
opera-tion and checked for possible leaks.
7. In normal operation, the device may onlybe operated when all
components of thedevice are functional and have not beendeactivated
or changed in their intendedfunction.
8. Operating the valve in constant throttlingposition at a small
opening angle maylead to increase wear of the sealing ele-ments
(seat/seatring). This will possiblylead to shorter maintenance
intervals.
9. When decommissioning the device, allsafety notes in the
“Maintenance and ad-justments” chapter must be observed.
Thedisposal of the device must be carried outin accordance with the
operational andnational regulations of the destinationcountry. The
relevant operating instruc-tions of the installed components or
acces-sories must also be followed here.
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5 Industrial Valves
Function
LEUSCH LTR 43 butterfly valves usually have a metal seat.Other
material alternative for the seat and seatring are stain-less steel
/ graphite, PTFE and stellite. Special coatings andspecial
materials are available per customer request.The valve has optimal
sealing characteristics when it isaligned according to the
preferred flow direction during instal-lation in the pipeline
system (Fig. 4).The preferred direction of flow is marked by an
arrow at theside of the valve body.Thanks to its unique geometric
design, the disc is presseduniformly against the body seat across
its whole surface area.The valve is adjustable. If subsequent
adjustment of the limitstops becomes necessary (refer also to
“Maintenance andadjustment”), this may only be done by qualified
and knowl-edgeable personnel and with the consent of the
manufacturer
The Triple offset is distinguished by the following
characteristics:1. OS (Offset): The shaft bearing has an axial
offset to the seatlevel, 2. OS: The shaft bearing has a radial
offset to the center ofthe body, 3. OS: the center of the conical
seat surface has a radi-al offset to the center of the body. (Fig.
4)
Maintenance and adjustment
All measures necessary for maintenance and repair shouldbe
carried out in accordance with the national regulations ofthe
destination country.
It is recommended to check the device regularly for
externalleaks and other adverse effects or anything conspicuous.The
Gland Packing usually consists of a set of form-pressedexpandable
rings. In the event of a leakage, the nuts on theGland must be
alternately tightened in little steps until theleak stops. It has
to be ensured, that the gland is always par-allel to the body
surface (Fig 5).If necessary, add additional packing rings. Observe
the maxi-mum permissible torques (see “Replacing the Gland
pack-ing”) or Page 8 table 1, if only torque values are
required.Complete Packing and repair sets for maintenance of
thevalves are available from LEUSCH or/and the authorisedLEUSCH
representative.
Before contacting your representative or Leusch GmbH,please make
a note of all the details on the name-plate of thevalve (Fig.
11).
ATTENTION: DANGER! Spring return actuators may only
bepressurised only when assembled in the pipeline and not forthe
purposes of performance of work on the valve outside thepipeline.
There is a risk of fatal injury if the auxiliary energysuddenly
fails and the valve disc then moves on its own intothe fail-safe
position as a result of spring tension.
For devices equipped with a spring return actuator with FailOpen
safety position, the valve disc may possibly need to beclosed for
installation in a pipeline. It must be ensured herethat the full
control pressure for closing the valve is main-tained for the
duration of the installation work.
Otherwise, the valve must be installed in the openposition, e.g.
by dismantling the pipeline.Caution should be taken also on devices
withspring-return actuators, for example, that does notcarry out
any functiondue to being clamped in place and therefore re-main in
any closed/open position. The returnspring could be decompressed at
any momentwithout active/connected auxiliary energies thussetting
the valve disc in motion.LEUSCH valves may only be assembled, put
intooperation and maintained by specialist and trainedpersonnel in
accordance with recognised technicalrules. Ensure that employees
and third parties arenot endangered. The operator must define
thenecessary measures for maintenance in the oper-ating
instructions. All safety or warning instructionsdetailed here and
in the product instructions (e.g.operating and maintenance
instructions) must befollowed.For valves which are used in oxygen
service, allmaintanance and repair works has to be carriedout in an
oil-and greasefree enviroment. All partsmus be clean and free from
oil and grease. Onlysuitable lubricants are permitted.
Fig. 4
Fig. 5
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6
During maintanance and adjustment works, thefollowing issues
have to be considered
1. Before starting work on the device, ensure that:all energy
supply lines and control signals of theactuator are disconnected or
locked so that theactuator cannot unexpectedly set the valve discin
motionthe affected system part is de-pressurised andthe pipeline
has been emptied. Special precau-tions must be taken (e.g. personal
protectiveequipment) if there is a risk of escaping fluid.Parts
which are to be processed have cooled orwarmed up to ambient
temperature to preventburns from (skin) contact.the valve disc is
in the closed position in caseswhere the valve must be removed from
the pipe-line.
2. Never loosen or tighten fastening elements (e.g.screws/bolts)
on parts when they are pressur-ised.
3. No manual gear or actuators may be disassem-bled when the
butterfly valves are pressurised.
4. Visually check the device at regular intervals
forcontamination, corrosion, leaks, functionality andother adverse
effects. Further points to bechecked may include: Usability,
settings on thecomponents, labels, coating and conductivity
5. In the event of leaks on the gland packing, alter-nately
tighten the nuts on the gland in smallsteps. Do not tighten nuts
more than necessary.Comply with the maximumtorques Page 8, Tab.
1
6. Modifications to the factory settings for actuators(e.g.
limit stops) and accessories (e.g. filter regu-lator, booster) are
not permitted and may only becarried out in individual cases with
the approvalof the manufacturer by qualified and
specialisedpersonnel.
7. Only use original spare parts for maintenance/repairs. These
are available on request
8. During reassembly in the pipework the note insection 7 has to
be considered
9. After finishing the service/repair, a hydrostaticpressure
test on the pressure loaded parts has tobe executed according to a
suitable test proce-dure
10.Valves which are not actuated for long periodsmust undergo
functional tests on a regular basis.If necessary, shorter
maintenance intervals maybe required if increased wear is expected
on thesealing elements (e.g. through abrasive, chemi-cal or other
adverse effects).
11.Valves for the SIL (Safety Integrity Level) Appli-cation must
be handled according to the follow-ing standards in regard to
maintenance and re-pair: - VDI 2180, -EN 61511,- EN 61508,Manual WA
236
Limit stop adjustmentIf necessary (e.g. in the event of
impermissi-ble leakage on the sealing element of thevalve), the
adjustment pressure betweenSeat and Seatring can be changed by
adjust-ing the limit Stop position at the actuator.ATTENTION!
Settings may only be changedby specialist personnel, with the
approval ofthe manufacturer, who are familiar with thehandling and
setting of such devices. Theinstructions in the operating
instructions ofthe actuator for setting the limit stops mustalso be
followed unconditionallyBefore settings are changed, a functional
testshould first be carried out as follows:
Open the valve fully to flush out possiblesolids from the
sealing surfaces of Seatand Seatring.
Close the valve and check whether thevalve closes correctly
(there should beno solids stuck between the Seat andSeatring).
The following procedure is recommended ifno improvement has been
achieved:
1. Loosen the lock nut for the limit positionstop and slightly
open the valve until thestop has been cleared.
2. Turn the adjustment screw by 1/4 turnsin counter clockwise
direction and clos-es the valve again. Check for
leakageintegrity.
3. If the result is satisfactory (observingthe permissible
leakage rate), tightenthe lock nut again while the valve disc
isclosed.
4. Otherwise repeat step 2. However, theadjustment screw should
not be un-screwed by more than 1 revolution alto-gether.
5. If the leakage rate remains impermissible,the sealing pair
(Seat/Seatring) may pos-sibly be damaged and must be examinedmore
closely (e.g. replacing the Seatring).The manufacturer should be
notified inthis case.
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7 Industrial Valves
Position Indicator and key direction (Fig. 6)
On versions with a coupling, the disc position is markedby two
red dots. In the closed position, the imaginaryconnection axis
between the red marks is perpendicularto the flow directionNote the
key position on versions without coupling.
The valve closes when the drive shaft is rotated clock-wise
(right-turning closure).
Fig. 6
Installing the actuator
See also the instructions for the different actuators.
1. Turn the disc to the OPEN position to avoid dam-age to the
seat.
2. Move the actuator to the OPEN position.3. Place the actuator
in the desired position on the
shaft.Attention! Note the key alignment.
4. Correctly fasten the actuator to the valve usingthe
screws.
5. Adhere to the instructions detailed under“Maintenance and
adjustments” when setting thelimit stops on the actuator.
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8
Replacement of the Gland Packing (Fig. 8)
The numbers in square brackets e.g. [500] are item
numbersrelating to the adjacent figures.
Prerequisite:The complete section of the pipework in which the
valve isinstalled is de-pressurised, cleanse and easily accessible
sothat the service personnel are not endangered in any way.The
actuator is free of connections so that it can be taken offthe
valve and safely stored at another location. All figures areonly
example illustrations for explanation.1. Secure the actuator [500]
with the crane, as in (Fig.7)2. Loosen and remove the screws [65]
and the washers
[67].3. Lift the actuator [500] with the crane and place in
a
safe location.4. Remove the key [68].5. Loosen and remove the
nuts [55] and the washers [56].6. Disassemble the gland [8] and
remove the old packing
rings [39]. (The support ring [239] remains in the body.)7.
Insert new packing rings [39] and position them.8. Install the
gland [8], nuts [55] and washers [56].9. Tighten the nuts [55]
alternately by hand using minimal
force.10. Install the key [68].11. Put the valve into operation
and alternately tighten the
nuts [55] in little steps in the event of any leaks on
thepacking [39]. It has to be ensured, that the gland isalways
parallel to the body surface (Fig 5).
12. Do not tighten the nuts [55] more than necessary.The maximum
torque in Table 1 on Page 8 must notbe exceeded.
13. If there is still a leak, the manufacturer should be
con-tacted.
If the valve is fitted with an actuator which may not be
re-moved for technical reasons the filling of the gland can
takeplace as follows: Make a diagonal cut in the packing ring
(Fig.9) and feed the ring carefully over the shaft and into the
gland.When inserting the packing rings, watch out that the
interfacesof the individual rings do not lie on top of each
other.
Do not exceed the thread tightening torques from Table 1
be-low.
Fig. 7
Fig. 8
Fig. 9
Thread sizes Max. allowable torque [Nm]
M6 9,1
M8 21,8
M10 44
M12 75
M16 180
M20 370
M24 608
M27 421
M30 571
M33 779
Table 1(Values in the table are applicable for lubricated
threads)
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9 Industrial Valves
Replacement of the cover seal (Fig. 10)
The numbers in square brackets e.g. [500] are item
numbersrelating to the adjacent figures.
Prerequisite:The complete section of the pipework in which the
valve isfound is de-pressurised, cleanse and easily accessible so
thatthe service personnel are not endangered in any way.Suitable
safety measures must be taken before disassemblyif there is the
possibility of dangerous medium residuesaround the cover.
1. Loosen and remove the screws [53] (Fig. 10).2. Disassemble
the cover [7] and remove the old cover
seal [37].3. The ring [25] may fall out fom the body when the
cover
is disassembled.4. Position the new cover seal [7] and ring [25]
on the
cover and install.5. Tighten the screws [53] by hand using
minimal force
initially.6. Tighten the screws [53] with the recommended
torque
listed in Table 1 on page 8.7. If there is still a leakage, the
manufacturer should be
contacted.
If additional repairs or the replacement of otherparts are
necessary to ensure safe operation of thevalve, then the
manufacturer must be contacted.
Fig. 10
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10
Replacement of the Seating system
LEUSCH Butterfly valves are available in severalseries for
almost all kind of applications and spec-ifications.The series are
different in the design of the seat-ing system. The procedure to
replace the seatand seatring are described in separate
docu-ments.If it is necessary to replace the seating elements,note
the type series from the name-plate and re-quest the adequate
instruction from LEUSCHIndustrial Valves. It can also be downloaded
fromthe homepage (www.leusch.de).
Type Series LTR43-2Document-No.: MI-LTR43-2-SR-EN
Type Series LTR43-3Document No.: MI-LTR43-3-SR-EN
Type Series LTR43-4Document-No.: MI-LTR43-4-SR-EN
Type Series LTR43-5Document-No.: MI-LTR43-5-SR-EN
Type Series LTR43-9Document No.: MI-LTR43-9-SR-EN
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11 Industrial Valves
Labeling
The devices are labelled with a metal name-plate, which is
usually attached to the valve or to another suitable part of the
deviceif necessary (e.g. extension, bracket). Conformity with the
European Directive for Pressure Equipment is confirmed when
thename-plate has a CE symbol with the ID number of the notified
body (see Fig. 11).The following details can be taken from the
plate: Manufacturer, device type (type), nominal diameter (DN or
NPS), nominalpressure (PN or CL), order number (P.O.), permissible
pressure (PS), permissible temperature (TS), Maximum
permissibledifferential pressure on the shut-off element (P shutoff
trim), year and month of manufacture (date), fluid group and (tag
no.), ifavailable.The preferred flow direction of flow is marked by
a directional arrow integrated in the valve body or affixed to the
valve body ata suitable location.Further information may be
available on additional metal plates.
Service
It is recommended to check the device regularly for external
leaks and other adverse effects or anything conspicuous.The Gland
Packing usually consists of form-pressed expandable rings. In the
event of leaks, alternately tighten the nuts on thegland until the
leak stops. If necessary, add additional packing rings. Observe the
maximum permissible torques (see“Replacing the gland packing”) or
Page 8 table 1, if only torque values are required.Complete packing
and repair sets for maintenance of the valves are available from
LEUSCH or/and the authorised LEUSCHrepresentative.To select the
right spare part kit, note all informations from the name- plate
and communicate this to LEUSCH.
Contact address:
LEUSCH GMBH INDUSTRIAL VALVESZiegeleistraße 10D-41472 Neuss,
GermanyPhone: +49 2131 7699-0Fax: +49 2131 7699-129E-mail:
[email protected]: www.leusch.de
Fig. 11
Disposal
Observe local, national and international refuse regulations.Do
not dispose of components, lubricants and hazard substances
together with your other household waste.
-
LEUSCH GMBH INDUSTRIEARMATUREN • Ziegeleistraße 10 • D-41472
Neuss GermanyPhone +49 2131 7699-0 • Fax +49 2131 7699-129 •
e-mail: [email protected] / www.leusch.de
Notice:
Leusch reserve the right to make improvements without prior
notice.
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MI-L
TR43
-EN