Richter NKL Series User manual

INSTALLATION AND OPERATING MANUAL
INSTALLATION AND OPERATING MANUAL INSTALLATION AND OPERATING MANUAL
INSTALLATION AND OPERATING MANUAL
Keep for future use !
Keep for future use !Keep for future use !
Keep for future use !
This installation and
operatin instruction
must be strictly observed
before transport, installa-
tion, commissionin etc.
Reproduction is enerally
permitted with indication
of the source but our
prior written consent
must always be obtained.
9520
9520 9520
9520
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070 070
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Revision 00 Edition 01/2002
Richter Shut-off
and Control Butter-
fly Valve

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 2 Edition 01/2002
List of Contents
1 General Page 3
1.1 Application
1.2 Type codes
1.3 Relevant documents
2 Safety Page 5
2.1 Notes on safety
2.1.1 For the customer/operator
2.1.2 For maintenance
2.2 Conversion work and production of spare
parts by the customer
2.3 Inadmissible modes of operation
3 Transport and storage Page 6
3.1 Storage
3.1 Transport preparations
3.2 Return consignments
4 Product description Page 7
4.1 Armouring
4.2 Shut-off element
4.3 Valve actuation
4.3.1 Actuated by hand lever
4.3.2 Actuated by means of worm gear
4.3.3 Remotely actuated
4.3.4 Required breakaway torque
4.4 Identification plate
4.5 Options
5 Installation Page 8
5.1 Installation possibilities
5.2 Flange caps and gaskets
5.3 Direction of flow and location
5.4 Installation
5.2.1 Additional notes for shut-off and control butter-
fly valves with actuator
5.5 Grounding
6 Operation Page 10
6.1 Initial start-up
6.2 Shut-down
6.2.1 Additional notes for shut-off and control
butterfly valves with actuator
6.3 Inadmissable modes of operation and their
consequences
7 Maintenance Page 11
7.1 Leak-proofness
7.2 Screwed connections
7.3 Cleaning
7.4 Maintenance
7.5 Notes for assembly
7.6 Tests
8 Malfunctions; causes and their
elimination Page 12
9 Diagram and tables Page 13
9.1 Pressure/temperature diagram
9.2 Dimensions
9.3 Flow rate values kv
9.4 Weights
9.5 Breakaway torques
9.6 Cavitation coefficient Z
9.7 Tightening torques
10 Drawings Page 16
10.1 Legend
10.2 Safety stuffing box
10.3 Transport securing device
10.4 Sectional drawing NKL hand-activated with
PFA-lined disc/stem unit
10.5 Sectional drawing NKS hand-activated
with PFA-lined disc/stem unit
10.6 Sectional drawing NK hand-activated with
stainless steel disc/stem unit
10.7 Connecting dimensions worm gear
10.8 Connecting dimensions actuator
Total No. of pages: 20

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 3 Edition 01/2002
1 General
Manufacturer:
ITT Richter Chemie-Technik GmbH
Otto-Schott-Str. 2
D-47906 Kempen
Telephone : [phone]
Fax: [phone]
E-mail : [email protected]
Internet: www.itt-richter.de
Designation:
Shut-off and control butterfly valve in 3 body designs:
lug-style, sandwich-type and double flange.
Disc/stem unit plastic-lined, stainless steel or
Hastelloy
Leak-proofness tested to DIN 3230, Part 1
Gas-tight in the seat to DIN 3230, Part 3 leak rate 1
Flange connecting dimensions: DIN EN 1092-2,
shape B
(ISO 7005-2 type B) PN 16
Face to face: DIN EN 558-1, basic series 20 (ISO
5752 series 20)
General conditions of delivery to DIN 3230.
Weight: See Section 9.4
Dimensions: See Section 10
Materials:
Body material: Ductile cast iron EN-JS 1049 to DIN
EN 1563 (0.7043 DIN 1693)
Lining material: PTFE/PFA
on request conductive lining
Disc/stem unit: PFA-lined or ..-F
Stainless steel 1.4408 or ..-S
Hastelloy C4 ..-H
Temperature range: -60 °C to +200 °C
(- 80 °F to +400 °F)
accord. to operating pressure
Operating pressure: from vacuum to 10 bar
(145 psig)
accord. to operating pressure
Valve sizes in mm :
with hand lever: DN 50, 80, 100, 150, 200
2“, 3“, 4“, 6“, 8“
with worm gear DN 50, 80, 100, 150, 200, 250,
300, 350, 400
2“, 3“, 4“, 6“, 8“, 10“, 12“, 14“, 16“
NK only up to DN 300
with actuator: DN 50, 80, 100, 150, 200, 250,
300, 350, 400
2“, 3“, 4“, 6“, 8“, 10“, 12“, 14“, 16“
NKP only up to DN 300
Activation: Hand lever, lockable
Worm gear with handwheel
Pneumatic or electric
(connection to ISO 5211)
Options: Safety stuffing box
Monitoring connection connection
Proximity initiator
Polished disc surfaces
1.1 Application
Richter shut-off and control butterfly valves are
pressure-maintaining components in accordance
with the German Pressure Equipment Directive
(DGRL) for the passage and shut-off of fluids. The
valves are suitable for vapours, gases and liquids of
group 1 according to the DGRL and have a
corrosion-resistant plastic lining.
The field of application for the shut-off and control
butterfly valves include:
Light and medium corrosive, pure and slightly
solids-laden liquids, vaopours and gases
Materials in contact with the medium which are
FDA-compliant can be used for food and phar-
maceutical feedstock as well as in biochemistry.
Powdered and granulated non or low abrasive
solids
Shut-off and control butterfly valves with a plastic-
lined disc/stem unit are used for highly aggressive,
corrosive media.
Shut-off and control butterfly valves with a stainless
steel disc/stem unit are suitable for less agressive
media, are cheaper and benficial for thorough valve
cleaning.
With all 3 body versions the valves can be installed
as a sandwich-type valve (intermediate flange valve),
with lug-style and double-flange body as a flange or
dead-end valve.
Product features:
Wide sealing surfaces of the body lining
Long valve neck for optimum heat insulation
Maintenance-free, self-adjusting stem seal
Leak-proof to the atmosphere in accordance with
the German Clean Air Code

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 4 Edition 01/2002
If the medium contains solids, the manufacturer
must be consulted on whether the valve is suitable
for the application in question.
Solids can lead to increased wear, leaks, damage to
sealing surfaces or to a reduction in the service life
of the valve.
In case of the valve is intended for operating data
other than those intended, the customer must
carefully examine whether the design of the valve,
accessories and materials are suitable for the new
application (consult the manufacturer).
1.2 Type codes
Shut-off and control butterfly valve with lug-style body
NKL/F Disc/stem unit of PFA, with lockable hand lever or worm gear with manual actuation
NKLP/F Disc/stem unit of PFA, with actuator
NKL/F-S Disc/stem unit of stainless steel, with lockable hand lever or worm gear with manual
actuation
NKLP/F-S Disc/stem unit of stainless steel, with actuator
NKL/F-H Disc/stem unit of Hastelloy C4, with lockable hand lever or worm gear with manual
actuation
NKLP/F-H Disc/stem unit of Hastelloy C4, with actuator
Shut-off and control butterfly valve with sandwich-type body
NKS/F Disc/stem unit of PFA, with lockable hand lever or worm gear with manual actuation
NKSP/F Disc/stem unit of PFA, with actuator
NKS/F-S Disc/stem unit of stainless steel, with lockable hand lever or worm gear with manual
actuation
NKSP/F-S Disc/stem unit of stainless steel, with actuator
NKS/F-H Disc/stem unit of Hastelloy C4, with lockable hand lever or worm gear with manual
actuation
NKSP/F-H Disc/stem unit of Hastelloy C4, with actuator
Shut-off and control butterfly valve with double-flange body
NK/F Disc/stem unit of PFA, with lockable hand lever or worm gear with manual actuation
NKP/F Disc/stem unit of PFA, with actuator
NK/F-S Disc/stem unit of stainless steel, with lockable hand lever or worm gear with manual
actuation
NKP/F-S Disc/stem unit of stainless steel, with actuator
NK/F-H Disc/stem unit of Hastelloy C4, with lockable hand lever or worm gear with manual
actuation
NKP/F-H Disc/stem unit of Hastelloy C4, with actuator
For material designation on the identification plate, see Section 4.4
1.3 Relevant documents
♦Data sheet
♦Declaration of conformity
♦General safety certificate according to
EUROPUMP QM 0912-16-2002
On request:
Installation and inspection regulations for centric shut-
off valves of the series NK/NKP, NKL/NKLP,
NKS/NKSP, QM No. 0910-08-1005

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 5 Edition 01/2002
2 Safety
A declaration of conformity pursuant to the EC
Directive 97/23/EC on pressure equipment is
enclosed with the overflow valve.
This operating manual contains fundamental
information which is to be observed during installa-
tion, operation and maintenance. It must therefore be
carefully read by the fitter and the specialized staff
responsible/customer before installation and
commissioning.
This manual must always be available at the location
of the machine/plant.
Not only are the general notes on safety listed under
this main section Safety to be observed but also the
special safety notes included at other points.
The staff for installation, operation and maintenance
must have the appropriate qualifications for this work.
The area of responsibility, authority and supervision of
the staff must be regulated precisely by the customer.
If the staff do not have the necessary know-how, they
are to be trained and instructed. This can, if neces-
sary, be performed by the manufacturer / supplier on
behalf of the customer.
General hazard symbol!
People may be put at risk.
Safety symbol! The valve and its function
may be put at risk if this safety symbol is
not observed.
It is imperative to observe warnings and signs
attached directly to the valve and they are to be kept
fully legible.
2.1 Notes on safety
Non-observance of the notes on safety may result
in the loss of any and all claims for damages.
For example, non-observance may involve the
following hazards:
Failure of important functions of the valve/plant.
Risk to people from electric, mechanical and
chemical effects.
Risk to the environment through leaks of hazard-
ous substances.
2.1.1 For the customer / operator
Please observe
the notes on safety in this operating manual,
the regulations on accident prevention,
as well as in-house work, operating and safety
instructions of the customer.
Hot or cold valve parts must be protected
by the customer from being touched.
Guards for moving parts must not be removed
when the valve is in operation.
Leaks of hazardous media (e.g. explosive, toxic,
hot) must be disposed of in such a way that there
is no risk to people and the environment. Statutory
provisions are to be observed.
Fire protection to DIN EN ISO 10479 is not
possible (plastic lining and plastic components).
Protection against noise may be necessary during
operation.
2.1.2 For maintenance
Valves which have been exposed to media which are
a health hazard must be decontaminated.
All safety and protective facilities must be remounted
or enabled immediately after the end of work.
The points listed in Section 6.1 (Initial commission-
ing) are to be observed before recommissioning.
2.2 Conversion work and production of spare parts by the customer
Conversion of or changes to the valves are only
admissible after consultation with the manufacturer.
Original spare parts and accessories authorized by
the manufacturer serve to enhance safety.
The use of other parts or design alterations to the
valve by third parties may annul the manufacturer's
liability for any resultant consequences.

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 6 Edition 01/2002
2.3 Inadmissible modes of operation
The operational reliability of the valve supplied is only
guaranteed if it is used properly in accordance with
Section 1 of this operating manual.
The operation limits specified on the identification
plate must under no circumstances be exceeded.
3 Transport and storage
It is imperative, for all transport work, to
observe generally accepted engineering
practice and the accident prevention
regulations.
During transport, storage and in particular
shutdown, protective flange caps to DIN
3443 must be mounted on both valve
flanges.
Handle the goods being transported with care. During
transport the valve must be protected against impacts
or collisions.
Directly after receipt of the goods, the consign-
ment must be checked for completeness and any
in-transit damage.
If damaged, the valve must not be installed in the
plant!
3.1 Storage
If the valve is not installed immediately after delivery,
it must be put into proper storage.
It should be stored in a dry, vibration-free and well-
ventilated room at as constant a temperature as
possible.
Store the valve in an upright position and secure it
from falling over! In case of prolonged storage
individual packing with a desiccant may be necessary.
The local conditions are to be taken into account.
Attention to drawn to the observance of the require-
ments of DIN 7716 (products made of rubber) or
equivalent national standards.
3.2 Transport preparations
During transport the disc/stem unit must not project
beyond the body dimensions.
Hand lever:
When the valve is in the closed position, the lever is
to lock in the first lever catch. This results in the
disc/stem unit being slightly opened.
Worm gear
When the valve is in the closed position, the
disc/stem unit is to be 10-15°open.
Actuator
When the valve is in the closed position, the
disc/stem unit is to be 10-15°open.
Attach a locking plate on shut-off and control butterfly
valves with a single-acting actuator. See also Section
5.4.1 and the drawing in Section 10.3.
Mount flange caps .
3.3 Return consignments
Valves which have conveyed aggressive
or toxic media must be well rinsed and
cleaned before being passed on to the
maintenance staff.
This applies in particular when goods are returned to
the manufacturer's works.
A General safety certificate according to
EUROPUMP on the field of application is to be
enclosed with the returned goods.
Pre-printed forms are enclosed with the installation
and operating manual.
Safety precautions and decontamination measures
are to be mentioned.

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 7 Edition 01/2002
4 Product description
As already listed in Section 1.1, Richter shut-off and
control butterfly valves are valves with a highly
corrosion-resistant, soft-sealing plastic lining. The
valves are protected against aggressive atmos-
pheres by an epoxy coating.
They are primarily used to shut off and regulate
aggressive media in pipelines.
Richter shut-off and control butterfly valves consist of
the assemblies:
shell
shut-off element
valve actuation
identification plate
The drawings in Section 10 show the construction.
4.1 Shell
The metallic shell 120 is in two parts.
It is available in 3 versions:
Lug-style body: Series NKL
Sandwich-type body Series NKS
Double-flange body Series NK
The upper and lower sections are bolted together.
With NKS and NK with hex. socket screws 914/1,
with NKL with threaded rods 918/1 and hex. nuts
920/2.
For tightening torques, see Section 9.7.
The body accommodates three plain bearings for the
stem.
The body bears the following information in
accordance with DIN EN 19:
nominal diameter
nominal pressure
body material
manufacturer's identification
charge number/foundry identification
4.2 Shut-off element
The shut-off element consists of the disc/stem unit
(single part) 221, the valve lining 409, flexible inlay
521, pressing foil 412, guide pins 229 (up to and incl.
DN 150), 3 plain bearings 300, 2 O-rings 400/1, 2
thrust rings 405, pre-loaded by the cup spring
assembly 518.
The cup spring assembly consists of 4 cup springs.
The disc/stem unit is bearing-mounted in a centric
position.
4.3 Valve actuation
The valve stem has a pivot to attach a hand lever
respectively a coupling.
Hand lever respectively pivot parallel to the axis of the
pipeline: 

Valve open
Hand lever respectively pivot at right angles to the
axis of the pipeline: 


Valve closed
In the case of a coupling, 2 red marks indicate the
position of the disc on them.
Marks parallel to the axis of the pipeline:


Valve open
Marks at right angles to the axis of the pipeline:


Valve closed
4.3.1 Actuated by hand lever
The throttling plate 519 permits a fixing of the lever at
15ointervals. It is lockable with a commercially
available padlock.
4.3.2 Actuated by means of worm gear
In the standard version, the manufacturer normally
provides worm gears with a special pick-up for the
stem pivot.
The bracket and the coupling are thereby not
required.
Commercially available worm gears equipped with a
connection as per ISO 5211 can also be connected.
These require a bracket and a coupling however.
This version is also necessary for butterfly valves with
a safety stuffing box.
Couplings and brackets are available as accessories
in the Richter range of products.

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 8 Edition 01/2002
4.3.3 Remotely actuated
Richter butterfly valves can be remotely actuated by
means of pneumatic, hydraulic or electric quarter-turn
actuators equipped with a connection as per ISO
5211.
Couplings and brackets are available as accessories
in the Richter range of products.
4.3.4 Required breakaway torque
The breakaway torque of the actuator must
be at least as high as the breakaway
torque of the butterfly valve, about 20%
higher being better however.
Media of higher viscosity and/or those with solids may
require an increased factor of safety when calculating
the size of the actuator. This is particularly true for
non-Newtonian fluids such as high polymer substanc-
es, suspensions, pastes, lubricants, resins, lacquers
etc.
Admissible factors of safety lie in the range of 20 -
50% of the breakaway torque.
To prevent damage to the valve, particular attention
must be paid to the torque Mdmax in Section 9.5.
4.4 Identification plate
The stainless steel identification plate, which is
permanently riveted to the body, contains the
following information:
Valve type, nominal pressure, lining material /
disc/stem unit material (abbreviation)
Adm. operating pressures at adm. temperatures
ITT Richter production No.
Customer-specific data
If the customer mounts his identification, it must be
ensured that the valve corresponds to the application.
Example:
4.5 Options
Safety stuffing box
The safety stuffing box acts independently from the
standard shaft gasket and can be re-adjusted by
hand.
Only with the option safety stuffing box: A sealing foil
413 is inserted between the upper section and the
lower section of shell.
If the shaft gasket is damaged, the valve can thus
continue to be operated for a short time.
See drawing Section 10.2.
Monitoring connection
The monitoring connection, between the standard
shaft gasket and the safety stuffing box, can be fitted
with attachments for monitoring pressure.
It can indicate leaks or build up a protective nitrogen
layer.
See drawing Section 10.2.
Proximity switch
The proximity switch indicates the closed position.
The signal reliably penetrates the thick-walled lining.

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 9 Edition 01/2002
5 Installation
5.1 Installation possibilities
Series NK double-flange body
They can be connected for sandwich installation or as
dead-end valves. They have flange bores to ISO
7005-2 PN 10 (DIN 2501 PN 10) or to ANSI B 16.5
Class 150.
When installed as intermediate flange valves, the pipe
screws are inserted through the flange bores and
serve as a centering aid.
When installed as a dead-end valve, threaded rods
and nuts are used, thus providing an alternative
connection to either pipe side.
Series NKS sandwich body
They are used for sandwich installation. The valve is
clamped between the two pipes.
Series NKL lug-style body
They are suitable as an intermediate flange and dead-
end valve. They have flange bores to ISO 7005-2 PN
10 (DIN 2501 PN 10) to ANSI B 16.5 Class 150; they
permit independent bolting from each other.
On request, through holes can also be provided
instead of the tapped bores.
5.2 Flange caps and gaskets
Contamination of or damage to the sealing surfaces
is best avoided if the protective caps remain on the
flanges until just before installation.
We recommend the installation of gaskets so that the
sealing surfaces are not damaged by the mating
flanges.
Keep care of solids on the sealing surfaces!
Where there is a particularly high risk of damage to
the plastic sealing surfaces, e.g. if the mating flanges
are made of metal or enamel, PTFE-lined gaskets
with a metal inlay should be used. These gaskets are
available as special accessories in the ITT Richter
range.
5.3 Direction of flow and location
Installation is independent of the direction of flow.
Any fitting position can be chosen.
Except solids-containing liquids:
In order to avoid adhering residue in the area of the
disc bearing, the stem should lie horizontally.
Solids can best be flushed away when the bottom half
of the disc opens into flow direction.
5.4 Installation
Can the disc open in the pipeline ?
For dimensions see Section 9.2.
Is the disc open 10 – 15°?
Mount butterfly valve and gaskets.
Tighten the piping bolts crosswise and hand-tight.
By means of a test actuation ensure that the disc
is able to freely rotate.
With the disc slightly opened, tighten the piping
bolts crosswise. For the torques see Section 9.7.
If a shut-off or butterfly valve is installed as a
dead-end valve, it must be ensured that it is closed
with a blind flange and the valve is secured against
being opened unintentionally.
5.4.1 Additional advice for shut-off and
control butterfly valve with actua-
tor
For single-acting actuators a locking plate
has been fitted into the bracket, blocking
the stem at a disc opening of 10 – 15°.
Remove the locking plate before the first test
actuation. Slightly actuate the actuator.
Please pay attention to the drawing in Section 10.3.

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 10 Edition 01/2002
5.5 Grounding
Series NKL, NKLP,
Series NKS, NKSP
One end of the grounding cable 532 is secured to the
underside of the head flange with a hex. nut 920/1
and a tooth lock washer 936/1.
The other end of the grounding cable fasten metallic
at the plant.
Series NK, NKP
Butterfly valves with tapped holes are earthed via the
piping bolts.
Sandwich-type butterfly valves with through holes are
earthed by means of the grounding strip drawn
through a pair of boreholes. This effects contact to a
piping bolt.
6 Operation
6.1 Initial start-up
Normally the valves have been tested for tightness
with water and air.
Unless other arrangements have been agreed to,
there may still be a residual quantity of water in the
flow section of the valve. Beware of a possible
reaction with the process liquid.
Following the initial loading of the valve with operating
pressure and operating temperature, the torques of all
connecting bolts must be checked.
For table of torques see Section 9.7.
6.2 Shut-down
Before loosening the flange bolts:
ensure plant to be free of pressure
flush out medium
observe safety regulations
Having dismounted the valve, immediately protect the
plastic flanges against mechanical damage by means
of flange caps. See also Section 3.2.
6.2.1 Additional advice for shut-off and
control butterfly valve with actua-
tor
Ensure that a remotely actuated quarter-
turn actuator cannot be accidentally
switched on.
Having dismounted the valve, mount the
locking plate.
See Section 5.4.1.and drawing in Section 10.3.
6.3 Inadmissible modes of operation and their consequences
Do not operate the butterfly valve without valve
actuation. Otherwise the disc will be uncontrollably
set in motion by the medium flow.
Butterfly valves with a hand lever should never be
abruptly opened or closed. This can lead to water
hammer effects.
Dissipate thermal expansion volumes in shut-off
pipes.
If the plastic swells up due to the effect of the
medium, this can result in the functional parts
jamming.
Operation with solids leads to increased wear.
Operation during cavitation leads to increased
wear.
Non-observance of the pressure-temperature
diagram can lead to damage of the plastic lining.
There must be no foreign matter on the sealing
surfaces.

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 11 Edition 01/2002
7 Maintenance
7.1 Leak-proofness
Regular visual inspection in line with the operating
requirements are necessary at the following points:
Stem passage
Body joint
Flange connections to pipeline
7.2 Screwed connections
Periodic checks of the tightening torques in line with
the operating requirements are required necessary at
the following points:
•Body nuts and bolts
•Pipe screws
Stuffing box screws (if present)
For tightening torques, see Section 9.7.
To prevent screw connections from becoming loose
in the event of pressure fluctuations or plant
vibrations, we recommend the installation of
expansion joints or pulsation dampers.
7.3 Cleaning
Prior to starting any repair work, the
valve is to be thoroughly cleaned. Even
if the valve has been properly emptied
and rinsed, residual medium may still
be found in the valve, e.g. between the lining and
body or in the bonnet.
Plastic parts may absorb medium which gradually
emerges from the material after cleaning.
Wear the prescribed protective clothing!
See Section 3.3.
7.4 Maintenance
When disassembling and assembling the valve,
attention is to be paid to the tables and drawings in
Section 9 and 10.
As the body lining 409 is drawn over the disc/stem
unit 221 while warm, this work should only be
carried out by the manufacturer.
All maintenance work is to be performed by
qualified staff using suitable tools.
See also Section 2.
If assembled incorrectly, individual
components of the valve may be
damaged and this can result in malfunc-
tions during operation.
7.5 Notes for assembly
Mount disc/stem unit 221 in closed position
together with body lining 409.
The flexible inlay 521 expands during assembly.
Do not cut off the overhang, but push back into
the lower and upper part of the shell 120.
Before tightening the body screws 914/1 (on
NKL/NKLP threaded rod 918/1 and hex. nut
920/2), align the disc/stem unit 221 centrally in
the closed position.
Mark the position of the disc/stem unit 221
against body lining 409 at the hub, so permitting
switching only to this point during later test
switching.
With disc/stem unit in closed position, tighten the
body screws (914/1, as well 918/1 and 929/2)
until the gap between the upper and lower part of
the shell 120 is ca. 5 mm.

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 12 Edition 01/2002
Open and close the butterfly valve anti-
clockwise (seen on the stem) several times.
This permits the formation of a
sealing edge.
Never switch in the other direction
of rotation over the sealing edge!
Tighten the body bolts 1-2 mm when disc in
closed position.
Repeat the previously described process once or
twice.
When finally tightening the body bolts, pay
attention to the torques provided in Section 9.7
Valves with safety stuffing boxes:
Insert sealing foil 413 between the upper and
lower halve of the shell 120.
Displace packing rings 402/1 by 90°against
each other
Tighten stuffing box bolts 901/3 with torque in
accordance with Section 9.7.
For detailed installation and inspection regulations
for shut-off and control butterfly valves, see QM No.
0910-08-1005, available from ITT Richter on
request.
7.6 Tests
Following tests would be done after the assembly :.
Measurement of the breakaway torque
The breakaway torque required for opening and
closing the valve is to be ascertained. The
maximum torque should not exceed the values
given in section 9.5.
Tightness of valve opening and shaft bushing
The completed valves have to undergo a „leak test
of the closure with air“.
The tightness of the shaft bushing (stuffing box) of
each valve is tested. The holding time begins once
the residual air has escaped from the stuffing box
chamber.
Tightness is verified according to DIN 3230 part 3
respectively MSS SP-67.
For detailed inspection regulations for shut-off and
control butterfly valves, see QM No. 0910-08-1005,
available from ITT Richter on request .
8 Malfunctions; causes and their elimination
Flange connection valve/pipeline leaking
Tighten screw connections with torque according
to Section 9.7. Should this not produce the
required tightness, the recommended torque
may be exceeded by 10 %.
If this fails to achieve tightness the leakage, then
damage has been caused to the sealing surfac-
es.
Dismount and inspect the valve.
Stem passage leaking
With no safety stuffing box:
Dismount valve and repair.
With safety stuffing box:
First of all, the packing gland follower can be
tightened.
For torques see Section 9.7
Then dismount the valve as quickly as possible
and repair.
Medium leaking at the partition between lower
and upper halves
Dismount valve and repair, probably the stem
seal is not tight.
Valve does not switch
Has the locking plate been dismounted ?
See Section 5.4.1.
Is the actuator supplied with power ?
Has a directional control valve been correctly
connected ?
Is there foreign matter in the valve ?
The bore of the valve is leaking
Wear at the valve actuation ?
Do limit stops have to be adjusted ?
Is the shaft deformed ?
Deformation, damage or wear to body lining or
disc ?
.

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 13 Edition 01/2002
9 Diagram and tables
9.1 Pressure-temperature-diagram
9.2 Dimensions
DN DN E
1
mm
T
1
Mm
L
2
mm
Connection
3
50 2“ 50 28 4 43 F07
80 3“ 80 67 18 46 F07
100 4“ 100 87 25 52 F07
150 6“ 150 142 48 56 F10
200 8“ 200 193 71 60 F10
250 10“ 250 243 92 68 F12
300 12“ 300 292 112 78 F12
350 14“ 350 343 137 78 F14
400 16“ 400 389 150 102 F14
1
See also Section 5.3 , paragraph 1
2
Face to face to DIN EN 558-1, series 20 (ISO 5752, series 20)
3
Connections for worm gears and brackets as per DIN ISO 5211
The inside diameter of the mounted pipe flanges must always be greater than the dimension E in the
table!
For more dimensions, see drawings in Section 10.

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 14 Edition 01/2002
9.3 Flow rate value kv[m³/h]
DN angel of opening
20° 30° 40° 50° 60° 70° 80° 90°
50 2“ 1 6 13 24 41 67 104 120
80 3“ 5 22 47 82 126 197 264 282
100 4“ 11 27 52 93 155 247 412 456
150 6“ 37 84 164 276 431 702 1126 1254
200 8“ 62 170 354 532 912 1371 2212 2503
250 10“ 85 285 512 882 1451 2256 3692 4083
300 12“ 159 421 835 1378 2282 3633 5735 6512
350 14“ 230 610 1210 2000 3300 5270 8320 9450
400 16“ 295 780 1550 2560 4240 6750 10650 12100
9.4 Weights
Lug-style body Sandwich-type body Double-flange body
DN open shaft-end open shaft-end open shaft-end Lever gear
50 2“ 4,5 3,5 4,0 0,7 4,0
80 3“ 7,5 4,5 5,0 0,7 4,0
100 4“ 9,5 6,0 7,5 0,7 4,0
150 6“ 16,0 11,0 12,0 3,7 4,5
200 8“ 23,0 15,0 19,5 3,7 4,5
250 10“ 35,0 25,0 29,0 – 9,5
300 12“ 54,0 33,0 47,5 – 9,5
350 14“ 68,0 47,0 – – 15,0
400 16“ 97,0 69,0 – – 15,0
Actuator see data of the manufacturer
9.5 Breakaway torques
DN Mderf
Nm
Mdmax
Nm
50
2“
20
100
80
3“
46
180
100
4“
63
360
150
6“
128
725
200
8“
185
775
250
10“
287
1435
300
12“
410
1775
350
14“
550
3000
400
16“
650
3500
9.6 Cavitational coefficient Z
(at kv/kvs = 75 %)
DN Z
50 2“ 0,32
80 3“ 0,30
100 4“ 0,29
150 6“ 0,26
200 8“ 0,23
250 10“ 0,19
300 12“ 0,16
350 14“ 0,14
400 16“ 0,12

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 15 Edition 01/2002
9.7 Tightening torques
Pipe screws
The following tightening torques are recommended
for the pipe screws:
Nom. flange
size
(mm)
Screws
Tightening
torque
(Nm)
50 4 x M16 30
80 8 x M16 25
100 8 x M16 30
150 8 x M20 55
200 8 x M20 75
250 12 x M20 65
300 12 x M20 75
350 16 x M20 75
400 16 x M24 85
Nom. flange
size Screws
Tightening
torque
(in-lbs)
2“ 4 x 5/8“ 266
3“ 8 x 5/8“ 221
4“ 8 x 5/8“ 266
6“ 8 x ¾“ 487
8“ 8 x ¾“ 664
10“ 12 x 7/8“ 575
12“ 12 x 7/8“ 664
14“ 12 x 1“ 664
16“ 16 x 1“ 752<
Tighten screws in diametrically opposite
sequence
After the plant has been started up (especially after
the first temperature load), the tightening torques
must be checked and the correct values reset.
The above tightening torques must not be exceeded.
For exception, see Section 8.
Stuffing box screws
2 x M8 3 Nm 27 in-lbs
Body screws
Body screws for lug-style body
Nom. Size Hex. nut
Tightening
torque
Nm in-lbs
50 2“ 2 x M10 30 266
80 3“ 2 x M12 50 442
100 4“ 2 x M12 50 442
150 6“ 2 x M16 100 885
200 8“ 2 x M16 100 885
250 10“ 2 x M20 200 1770
300 12“ 2 x M20 200 1770
350 14“ 4 x M16 100 885
400 16“ 4 x M20 200 1770
Hex. socket screws for sandwich body
Nom. size
Hex. socket
screws
Tightening
torque
Nm in-lbs
50 2“ 2 x M10 30 266
80 3“ 2 x M12 50 442
100 4“ 2 x M12 50 442
150 6“ 2 x M16 100 885
200 8“ 2 x M16 100 885
250 10“ 2 x M16 100 885
300 12“ 2 x M20 200 1770
350 14“ 4 x M16 100 885
400 16“ 4 x M16 100 885
Hex. socket screws for double-flange body
Nom. Size
Hex. socket
screws
Tightening
torque
Nm in-lbs
50 2“ 2 x M10 30 266
80 3“ 2 x M10 30 266
100 4“ 2 x M10 30 266
150 6“ 2 x M12 50 442
200 8“ 2 x M12 50 442
250 10“ 2 x M12 50 442
300 12“ 2 x M12 50 442

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 16 Edition 01/2002
10 Drawings
10.1 Legend
120 shell 518 cup spring assembly
221 disc/stem unit 519 throttling plate
** 229 guide pin 521 flexible inlay
235 lever assembly 532 grounding rope
300 plain bearing 550 disc
400/1 o-ring 558 grounding strip
* 400/2 o-ring 804 coupling
405 thrust ring 850 actuator
409 body lining 857 gear
412 pressure gasket 901/X hex. screw
* 413 sealing foil 914/1 hex. socket screw
* 503 packing gland follower 918/1 threaded rod
507 support 920/X hex. nut
510 bracket 936/1 tooth lock washer
517 scraper ring 980/X round head grooved pin
* Only with safety stuffing box
** Only up to and incl. DN 150 / 6”
10.2 Safety packing
10.3 Transport securing device

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 17 Edition 01/2002
10.4 Sectional drawing NKL Lug-style body with hand lever and
PFA-lined disc/stem unit
Dimensions in mm

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 18 Edition 01/2002
10.5 Sectional drawing NKS Sandwich-type body with hand lever and
PFA-lined disc/stem unit
Dimensions in mm

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 19 Edition 01/2002
10.6 Sectional drawing NK Double-flange body with hand lever and stainless steel
disc/stem unit
Dimensions in mm

Installation and Operating Manual
Series NKL, NKLP, NKS, NKSP, NK, NKP
9520-070-en Revision 00
TM 5028 MPE/Wm Page 20 Edition 01/2002
10.7 Connecting dimensions worm gear
Dimensions in mm
10.8 Connecting dimensions actuator
Dimensions in mm