Richter NK/F series User manual

INSTALLATION AND OPERATING MANUAL
Keep for future use!
This operating manual must be strictly observed before
transport, installation, operation and maintenance
Subject to change without notice.
Reproduction is generally permitted with indication of the source.
©Richter Chemie-Technik GmbH
9520-070-en Revision 10 Edition 10/2011
Series NK/F, NKP/F, NKL/F, NKLP/F,
NKS/F, NKSP/F
Richter Shut-off and
Control Butterfly Valve
Lug-style body: Series NKL/F
Wafer-style body: Series NKS/F
Double-flange body: Series NK/F

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 2
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List of Contents
List of Contents.........................................2
Relevant documents.................................3
1Technical data......................................3
1.1 Overview of sizes ........................................ 4
1.2 Name plate, CE and body markings............4
1.3 Tightening torques.......................................5
1.4 Dimensions - Installation .............................6
1.5 Flow rate value kv [m³/h] ............................6
1.6 Weights (ca. kg)..........................................7
1.7 Pressure-temperature-diagram ...................7
1.8 Breakaway torques......................................8
1.9 Cavitation coefficient z for 75% duty ...........8
2Notes on safety ....................................8
2.1 Intended use................................................8
2.2 For the customer / operator.........................9
2.3 Improper operation ......................................9
3Safety notes for applications in
potentially explosive areas based on
the Directive 94/9/ EC (ATEX)..............9
3.1 Intended use................................................9
4Safety note for valves, certified to
German Clean Air Act (TA Luft) ........10
5Transport, storage and disposal.......10
5.1 Storage ......................................................11
5.2 Transport preparations ..............................11
5.3 Return consignments.................................11
5.4 Transport securing device .........................11
5.3 Disposal ..................................................... 11
6Installation..........................................12
6.1 Installation possibilities..............................12
6.2 Flange caps and gaskets...... .. ....... ....... ..... 12
6.3 Direction of flow and installation position .12
6.4 Installation. ............ ..... ............ ..... ....... ..... ... 12
6.4.1 Additional advice for shut-off and control
butterfly valve with actuator...........................12
6.5 Earthing .....................................................12
7Operation............................................13
7.1 Initial commissioning .................................13
7.2 Improper operation and their consequences.
.. ....... ....... ....... .. ....... ....... ....... ....... .. ....... . 13
7.3 S h u t d o w n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3
7.3.1 Additional advice for shut-off and control
butterfly valve with actuator...........................13
8Malfunctions.......................................14
9Maintenance.......................................14
9.1 Notes for assembly................................... 14
9.1.1 Safety stuffing box ........................................ 15
9.2 Valve actuation.......................................... 15
9.2.1 Actuated with lever........................................ 15
9.2.2 Actuated by means of worm gear.................. 15
9.2.3 Remotely actuated........................................ 15
9.2.4 Required breakaway torque.......................... 15
9.3 O ptions .. .. ....... ....... ....... ......... ....... ....... ...... 15
9.3.1 Safety stauffing box ...................................... 15
9.3.2 Monitoring connection................................... 15
9.3.3 Proximity switch............................................ 16
9.4 Tests ......................................................... 16
10 Drawings.............................................16
10.1 Legend ...................................................... 16
10.2 Sectional drawing NK/F, DN 50 – 150, 2"– 6"
............................................................... 17
10.3 Sectional drawing NK/F, DN 200-300, 8"-12"
............................................................... 18
10.4 Sectional drawing NKS/F, DN 50 – 150, 2"–
6" ............................................................... 19
10.5 Sectional drawing NKS/F, DN 200-400, 8"-
14" ............................................................. 20
10.6 Sectional drawing NKL/F, DN 50 – 150, 2"–
6" ............................................................... 21
10.7 Sectional drawing NKL/F, DN 200-400, 8"-
14" ............................................................. 22
10.8 Worm gear ................................................ 23
10.9 Actuat or ... ....... ....... ......... ....... ....... ....... .. .... 23
10.10 Option safety stuffing box...................... 24
10.11 Dimensional drawing NK/F with lever
assembly ................................................... 25
10.12 Dimensional drawing NK/F with worm gear
............................................................... 26
10.13 Dimensional drawing NKP/F ................ 27
10.14 Dimensional drawing NKS/F with lever
assembly ................................................... 29
10.15 Dimensional drawing NKS/F with worm
gear ........................................................... 30
10.16 Dimensional drawing NKSP/F.............. 31
10.17 Dimensional drawing NKL/F with lever
assembly ................................................... 33
10.18 Dimensional drawing NKL/F with worm
gear ........................................................... 34
10.19 Dimensional drawing NKLP/F .............. 35

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 3
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Relevant documents
Declaration of conformity acc. to the EC Pressure
Equipment Directive 97/23/EG
Manufacturer’s Declaration German Clean Air Act
(TA-Luft
Manufacturer’s Declaration SIL
Form for Safety Information Concerning the
Contamination QM 0912-16-2001_en
For NKLP/F, NKSP/F or NKP/F operating manual
for actuator
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
Change from manual operationto power operation
Dimen.9520-00-4212
1Technical data
Manufacturer:
Richter Chemie-Technik GmbH
Otto-Schott-Str. 2
D-47906 Kempen
Telephone: [phone]
Fax: [phone]
E-Mail : [e-mail]
Internet: http://www.richter-ct.com
Designation:
Shut-off and control butterfly valve
3body designs
:lug-style, wafer-styleand double
flange.
Disc/stem unit plastic-lined,
Certified to Clean Air Act (TA Luft)
Strength and tightness (P10, P11) of the pressure-
bearing body tested to DIN EN 12266-1.
Gas-tight (P12) in the seat to DIN EN 12266-1,
leak rate A
Flange connecting dimensions:
DIN EN 1092-2, shape B, (ISO 7005-2 type B) PN 10
or ASME B16.5 class 150
Face to face:
DIN EN 558-1, basic series 20 (ISO 5752 series 20)
or API 609 table 2
or MSS SP-67 table 3
Weights: See table in Section 1.6
Dimensions and individual parts:
See dimensional and sectional drawing in Section 10
Materials:
Body material: Ductile cast iron EN-JS 1049 /
ASTM A395
Lining material:PFA/PTFE .../F
On request: antistatic …/F–L
highlypermeation-resistant.../F–P
modifiedTFM-PTFE
Disc/stem unit:PFA-lined ...–F
Temperature range: -60 °C to +200 °C
(-80 °F to +400 °F)
accord. to operating pressure
See pressure-temperature diagram in Section 1.7.
Operating pressure:from vacuum to 10 bar
(145 psig)
accord. to operating pressure in Section 1.7.
Activation:
Hand lever, lockable
Worm gear with handwheel
Pneumatic or electric
(connection to DIN EN ISO 5211)
Options:
Safety stuffing box
Monitoring connection
Proximity initiator
Manually operated with limit switch

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 4
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1.1 Overviewofsizes
Series Actuation /F /F-L Body design
NK/F Lever DN 50, 80, 100, 150, 200
2", 3", 4" 6, 8" DN 50, 80, 100, 150, 200 2", 3", 4" 6", 8"
Gear DN 50, 80, 100, 150-300
2", 3", 4" 6-12" DN 50, 80, 100, 150-300 2", 3", 4" 6-12"
NKP/F Actuator
connection to ISO
5211
NKS/F Lever DN 50, 80, 100, 150, 200
2", 3", 4" 6, 8" DN 50, 80, 100, 150, 200 2", 3", 4" 6, 8"
Gear DN 50, 80, 100, 150-400
2", 3", 4" 6-16" DN 50, 80, 100, 150-250, 2", 3", 4" 6-10"
NKSP/F Actuator
connection to ISO
5211
NKL/F Lever DN 50, 80, 100, 150, 200
2", 3", 4" 6, 8" DN 50, 80, 100, 150, 200 2", 3", 4" 6, 8"
Gear DN 50, 80, 100, 150-400
2", 3", 4" 6-16" DN 50, 80, 100, 150-250 2", 3", 4" 6-10"
NKLP/F Actuator
connection to ISO
5211
1.2 Name plate, CE and body markings
The stainless steel name plate is undetachably riveted
to the body.
If the operator attaches his identification, it must be
ensured that the valve matches the application in
question.
Example of name plate with CE marking:
Body identification:
The following are visible on the body according to DIN
EN 19 and AD 2000 A4:
Nominal size
Rated pressure
Body material
Manufacturer's identification
Melt number/Foundry identification
Cast date

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 5
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Sign for transport securing device for actuator
1.3 Tighteningtorques
All screws greased, tighten in diametrically
opposite sequence!
After the plant has been started up (especially with the
first temperature load) the tightening torques must be
checked and the correct value set again.
The tightening torques for pipe screws and body
screws mentioned must not be exceeded. For an
exception, see Section 8,flange connection
valve/pipe is leaking.
The following tightening torques are recommended:
Packing screws
Screws Tightening torque
[ISO/DIN] [Nm] [in-lbs]
2 x M8 327
Pipe screws, flanges to ISO/DIN
Flange
nom. size Screws Tightening torque
[mm] [ISO/DIN] [Nm]
50 4xM16 30
80 8xM16 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
Pipe screws flanges ISO/DIN drilled to ASME Class
150
Flange nom. size Screws Tightening
torque
[mm] [inch] [ASME] [Nm] [in-lbs]
50 2“4xP“30 266
80 3“4xP“50 442
100 4“8xP“30 266
150 6“ 8 x ¾“ 55 487
200 8“ 8 x ¾“ 75 664
250 10“ 12 x 7/8“ 65 575
300 12“ 12 x 7/8“ 75 664
350 14“ 12 x 1“ 75 664
400 16“ 16 x 1“ 85 752
Body screws
Hex. Nut 920/2 for lug-style body
Nom. size Hex. nuts Tightening
torque
[mm] [inch] [ISO/DIN] [mm] [inch]
50 2“ 4 x M10 30 266
80 3“4xM1250442
100 4“ 4 x M12 50 442
150 6“ 4 x M16 100 885
200 8“ 4 x M16 100 885
250 10“ 4 x M16 100 885
300 12“ 4 x M20 200 1770
350 14“ 8 x M16 100 885
400 16“ 8 x M20 200 1170

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 6
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Hex. socket screw 914/1 for sandwich body
Nom. size Hex. socket
screw Tightening
torque
[mm] [inch] [ISO/DIN] [mm] [inch]
50 2“ 2 x M10 30 266
80 3“ 2 x M12 50 442
100 4“ 2xM12 50442
150 6“ 2xM16 100885
200 8“ 2xM16 100885
250 10“ 2xM16 100885
300 12“ 2xM20 2001770
350 14“ 4xM16 100885
400 16“ 4xM16 100885
Hex. socket screw 914/1 for double-flange body
Nom. size Hex. socket
screw Tightening
torque
[mm] [inch] [ISO/DIN] [mm] [inch]
50 2“ 2 x M10 30 266
80 3“ 2 x M10 30 266
100 4“ 2xM10 30266
150 6“ 2xM12 50442
200 8“ 2xM12 50442
250 10“ 2xM12 50442
300 12“ 2xM12 50442
1.4 Dimensions-Installation
Nom. size[ E1T1L2Connection3
[mm] [inch] [mm] [mm] [mm]
502“ 28 4 43 F07
80 3“ 67 17,5 46 F07
100 4“ 87 24,5 52 F07
150 6“ 142 48 56 F10
200 8“ 193 71 60 F10
250 10“ 243 92 68 F12
300 12“ 292 112 78 F12
350 14“ 343 137 78 F14
400 16“ 389 150 102 F14
1See also Section 6.4, paragraph 1
2Face to face to DIN EN 558-1, series 20 (ISO 5752, series 20)
3Connections 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.
1.5 Flow rate value kv [m³/h]
Nom. Size
[mm] [inch] 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 7021126 1254
200 8“ 62 170 354 532 91213712212 2503
250 10“ 85 285 512 882 145122563692 4083
300 12“ 159 421 8351378 228236335735 6512
350 14“ 230 61012102000 330052708320 9450
400 16“ 295 78015502560 424067501065012100

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 7
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1.6 Weights (ca. kg)
Nom. size Lug style body Sandwich-
body Double-flange body
[mm] [inch] open
staff ende open staff ende open staff ende 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 7,0 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
1.7 Pressure-temperature-diagram
When used in the area of application of ASME,
thelow temperature of ASTM A395 is limited to
–20 °F (– 29 °C).
According to AD 2000
When used in the minus temperature range,
the regulations applicable in the country in
question must be observed.
According to ASME B16.42

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 8
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1.8 Breakawaytorques
Nom. size Mderf Mdmax
[mm] [inch] [Nm] [Nm]
50 2“ 20100
80 3“ 46180
100 4“ 63360
150 6“ 128 725
200 8“ 185 775
250 10“2871435
300 12“4101775
350 14“5503000
400 16“6503500
1.9 Cavitation coefficient z for
75% duty
Nom. size (bei kv/kvs = 75 %)
[mm] [inch] 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
2 Notes on safety
This operating manual contains fundamental
information which is to be observed during installation,
operation and maintenance.
It must therefore be read before installation and
commissioning!
For valves which are used in potentially explosive
areas, see Section 3.
Installation, operation and maintenance are to be
performed by qualified staff.
The area of responsibility, authority and supervision of
the staff must be regulated by 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.
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 Intendeduse
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 pharma-
ceutical 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
awafer-stylevalve (intermediate flange valve), with
lug-style and double-flange body as a flange or dead-
end valve.

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 9
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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
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).
2.2 For the customer / operator
If a valve is used, the operator must ensure that
actuators which are retrofitted are adapted to suit
the valve
hot or cold valve parts are protected by the
customer against being touched
the valve has been properly installed in the pipe
system
the usual flow rates are not exceeded in continu-
ous operation.
This is not the manufacturer's responsibility.
Butterfly valves which are used as end
valves must be sealed with a blind flange at
the free connection end and appropriately
secured against unauthorised activation.
Loads caused by earthquakes were not allowed for in
the design.
Fire protection to DIN EN ISO 10497 is not possible
(plastic lining and plastic components).
2.3 Improperoperation
The operational reliability of the valve supplied is only
guaranteed if it is used properly in accordance with
Section 2.1 of this operating manual.
The operation limits specified on the
identification plate and in the pressure-
temperature diagram must under no
circumstances be exceeded.
3 Safety notes for applications in potentially explosive areas
based on the Directive 94/9/ EC (ATEX)
The valves are intended for use in a potentially
explosive area and are therefore subject to the
conformity assessment procedure of the directive
94/9/EC (ATEX).
As part of this conformity assessment, an ignition
hazard analysis to EN 13463-1 to satisfy the
fundamental safety and health requirements was
conducted with the following result:
The valves do not have any ignition source of
their own and can be operated both manually
as well as mechanically/electrically.
The valves are not covered by the scope of
application of the ATEX directive and therefore
do not need to be identified accordingly.
The valves may be used in a potentially
explosive area.
Supplementary notes:
Electric/mechanical actuators must be
subjected to their own conformity assessment
to ATEX.
It is imperative to observe the individual points of
intended use for application in a potentially explosive
area.
3.1 Intendeduse
Improper operation, even for brief periods, may result
in serious damage to the unit.
In connection with explosion protection, potential
sources of ignition (overheating, electrostatic and
induced charges, mechanical and electric sparks) may
result from these improper operation; their occurrence
can only be prevented by adhering to the intended
use.
Furthermore, reference is made in this connection to
the Directive 95/C332/06 (ATEX 118a) which contains
the minimum regulations for improving the occupa-
tional health and safety of the workers who may be at
risk from an explosive atmosphere.
Adifference is made between two cases for the use of
chargeable liquids (conductivity <10-8 S/m):
1. Chargeableliquidandnon-conductive
lining
Charges can occur on the lining surface. As a
result, this can produce discharges inside the
valve. However, these discharges cannot cause
ignitions if the valve is completely filled with me-
dium.

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 10
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If the valve is not completely filled with medium,
e.g. during evacuation and filling, the formation of
an explosive atmosphere must be prevented, e.g.
by superimposing a layer of nitrogen.
It is recommended to wait 1 hour before removing
the valve from the plant in order to permit the
elimination of static peak charges.
This means that, to safely prevent ignitions, the
valve must be completely filled with medium at all
times or else a potentially explosive atmosphere
must be excluded by superimposing a layer of inert
gas.
2. Chargeable liquid and conductive lining
No hazardous charges can occur as charges are
discharged direct via the lining and shell (surface
resistance <109Ohm, leakage resistance <106
Ohm).
Static discharges of non-conductive linings are
only produced through the interaction with a
non-conductive medium and are therefore the
responsibility of the plant operator.
Static discharges are not sources of ignition
which stem from the valves themselves!
The temperature of the medium must not exceed
the temperature of the corresponding temperature
class or the maximum admissible medium temper-
ature as per the operating manual.
If the valve is heated (e.g. heating jacket), it must
be ensured that the temperature classes pre-
scribed in the Annex are observed.
To achieve safe and reliable operation, it must be
ensured in inspections at regular intervals that the
valve is properly serviced and kept in technically
perfect order.
Increased wear to the valve can be expected with
the conveyance of liquids containing abrasive
constituents. The inspection intervals are to be
reduced compared with the usual times.
Actuators and electric peripherals, such as
temperature, pressure and flow sensors etc., must
comply with the valid safety requirements and
explosion protection provisions.
The valve must be grounded.
This can be achieved in the simplest way via the
pipe screws using tooth lock washers.
Otherwise grounding must be ensured by other
action, e.g. cable bridges.
Attachments such as actuators, position control-
lers, limit switches etc. must satisfy the relevant
safety regulations as regards explosion protection
and, if required, be designed in compliance with
ATEX.
Special attention must be paid to the appropriate
safety and explosion protection notes in the re-
spective operating manuals.
Plastic-lined valves must not be operated with
carbon disulphide.
4 Safety note for valves, certified to German Clean Air Act (TA
Luft)
On request, this valve can be supplied compliant with
the German Clean Air Code.
Certificate / Manufacturer Declaration Validity is
dependent on the operating instructions being read
and observed.
In particular, servicing must be conducted at regular
intervals, and the bolted connections relevant for
tightness must be inspected and retightened if
necessary.
5 Transport, storage and disposal
It is imperative, for all transport work, to
observe generally accepted engineering
practice and the accident prevention
regulations.
The valve is supplied with flange caps. Do not
remove them until just before installation.
They protect the plastic surfaces against dirt
and mechanical damage.
Handle the goods being transported with care. During
transport the valve must be protected against impacts
and collisions.
Directly after receipt of the goods, the consignment
must be checked for completeness and any in-transit
damage.
Do not damage the external epoxy coating.

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 11
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5.1 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.
Elastomers are to be protected against UV light.
In general, a storage period of 10 years should not be
exceeded.
It is not permitted to put the valve into store with the
disc completely closed or with an opening angle
greater than 15°.
5.2 Transportpreparations
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
6.4.1 and the drawing in Section 5.4.
Mount flange caps.
5.3 Returnconsignments
Valves which have conveyed aggressive or
toxic media must be well rinsed and cleaned
before being returned to the manufacturer's
works.
It is imperative to enclose a safety information
sheet / general safety certificate on the field of
application with the return consignment.
Pre-printed forms are enclosed with the installation
and operating manual.
Safety precautions and decontamination measures
are to be mentioned.
5.4 Transportsecuringdevice
5.3 Disposal
Parts of the valve may be contaminated with medium
which is detrimental to health and the environment
and therefore cleaning is not sufficient.
Risk of personal injury or damage to the
environment due to the medium!
Wear protective clothing when work is performed
on the valve.
Prior to the disposal of the valve:
Collect any medium, etc. which has escaped
and dispose of it in accordance with the local
regulations.
Neutralise any medium residues in the valve.
Separate valve materials (plastics, metals, etc.)
and dispose of them in accordance with the local
regulations.

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 12
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6 Installation
Examine valve for in-transit damage, damaged ball
valves must not be installed.
Before installation the valve and the connecting
pipe must be carefully cleaned to remove any dirt,
especially hard foreign matter.
During installation, pay attention to the correct
tightening torque, aligned pipes and tension-free
assembly.
Ensure that a remotely actuated actuator
cannot be accidentally switched on.
6.1 Installationpossibilities
Series NK/F - 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 ASME/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/F - sandwich body
They are used for sandwich installation. The valve is
clamped between the two pipes.
Series NKL/F - 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 ASME/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.
6.2 Flange caps and gaskets
Leave protective caps on the flanges until just prior to
installation.
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 Richter range.
6.3 Direction of flow and
installation position
Installation is independent of the direction of flow.
Any fitting position can be chosen.
Except solids-containing liquids:
With solid containing media butterfly valves are
preferably installed with horizontally positioned stem
and bottom half of disc opening into flow direction.
6.4 Installation
Can the disc open in the pipeline?
For dimensions see Section 1.4.
Is the disc open 10 – 15°?
Mount butterfly valve and gaskets centrically.
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 1.3.
Butterfly valves which are used as end
valves must be sealed with a blind flange
at the free connection end and
appropriately secured against
unauthorised activation.
6.4.1 Additional advice for shut-off and
control butterfly valve with actuator
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, screw in again hex. screw 901/1.
Slightly actuate the actuator.
Please pay attention to the drawing in Section 5.4.
6.5 Earthing
One end of the grounding rope 532 is attached with a
hex. nut 920/1 and a tooth lock washer 936/1 to the
underside of the head flange.
The other end is metallically secured in the plant.
Series NK/F, NKP/F
Butterfly valves with tapped bores are earthed by the
pipe screws.
At the customer's request a setscrew M6 with a hex.
nut and washer will be provided at each flange as an
additional grounding connection.

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 13
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7Operation
7.1 Initialcommissioning
Normally, the valves have been tested for leaks with
air or water. Prior to initial operation check body
bolting. For torques see Section 1.3.
Unless otherwise agreed, there could be
residual amounts of water in the flow section
of the valve; this could result in a possible
reaction with the medium.
To prevent leaks, all connection screws should be
retightened after the initial loading of the valve with
operating pressure and operating temperature.
For torques see Section 1.3.
7.2 Improper 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.
There must be no foreign matter on the sealing
surfaces.
Operation during cavitation leads to increased
wear.
Non-observance of the pressure-temperature
diagram can lead to damage of the plastic lining.
If no monitoring is provided by the warning
connection, do not tighten safety stuffing box.
Otherwise any leak cannot be seen.
Do not apply heavy loads to the lever; the lever or
butterfly valves may be damaged.
Do not use a lever extension as this could cause
damage.
7.3 Shutdown
Before loosening the flange bolts:
ensure plant to be free of pressure
flush out medium
observe safety regulations
Prior to starting any repair work, the valve is to be
thoroughly cleaned. Even if the valve has been
properly emtied and rinsed, residual medium may still
be found in the valve,
After dismantling, immediately protect the valve
flanges against mechanical damage with flange caps.
See also Section 6.2.
7.3.1 Additional advice for shut-off and
control butterfly valve with actuator
Ensure that a remotely actuated quarter-turn
actuator cannot be accidentally switched on.
Having dismounted the valve, mount the locking
plate 507 and screw in with hex. screw. 901/1.
See also Section 6.4.1 and drawing in Section 5.4.

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 14
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8Malfunctions
Flange connection valve/pipe is leaking
Retighten the flange screws to a tightening torque
according to Section 1.2.If this does not remedy
the leak, the recommended torques may be
exceeded by 10%.
If this also fails to stop the leak, dismantle and
inspect the valve.
Flange connection main body/body end piece is
leaking
Retighten body screws. See paragraph "Flange
connection valve/pipe is leaking".
Packing is leaking
Retighten packing nuts according to the details in
Section 1.2.
Ball valve does not operate
Is the actuator being supplied with power?
Is any directional control valve connected correct-
ly?
Is there any foreign matter in the valve?
The ball no longer closes completely
Is the stem deformed?
Is the coupling worn?
With a worm gear or actuator, check whether the
end stops can be re-adjusted. The operating
manuals of the gear and actuator manufacturers
contain accurate instructions.
Never apply force to the lever or use an
extension.
1. Try to get the ball valve working again by mov-
ing the lever to and from.
2. Remove the lever stop and try to switch against
the normal direction of rotation.
3. If actuation is not possible with the max. ad-
missible breakaway torque as per Section 1.3,
dismantle ball valve and inspect individual
components.
9Maintenance
All repair work is to be performed by qualified
personnel using the appropriate tools.
For the arrangement, designation and item
numbers of all parts of the valve, see Section 10.
Spare parts are to be ordered with all the details
in acc. with the valve identification.
Only original spare parts may be installed.
To prevent leaks, a regular check of the connec-
tion screws should be made in line with the oper-
ating requirements.
For torques see Section 1.3.
When disassembling and assembling the valve,
attention is to be paid to the tables and drawings
in Section 1 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.
Has the pump been shut down, drained and
flushed according to the regulations?
See also Section 7.3.
If assembled incorrectly, individual compo-
nents of the valve may be damaged and this
can result in malfunctions during operation.
9.1 Notesforassembly
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.
Open the valve several times counterclockwise
(when viewing the stem unit) and close again in
the opposite direction. A sealing edge can form in
this way.
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 1.3.

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 15
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9.1.1 Safety stuffing box
Insert sealing foil 413 between the upper and
lower halve of the shell 120.
Displace packing rings 402/1 by 90° against each
other
Screw in stuffing box screws 901/3.Only tighten
in the event of a leak.
Safety stuffing box with monitor using warning
connection
Tighten stuffing box bolts 901/3 with torque in
accordance with Section 1.3.
See also Section 10.10.
For detailed installation and inspection regulations
see QM No. 0910-08-1005, available from Richter on
request.
9.2 Valveactuation
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
9.2.1 Actuatedwithlever
The throttling plate 519 permits a fixing of the lever at
15° intervals. It is lockable with a commercially
available padlock.
9.2.2 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.
9.2.3 Remotelyactuated
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.
9.2.4 Requiredbreakawaytorque
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 sub-
stances, 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 1.8.
9.3 Options
9.3.1 Safety stauffing 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 10.10.
In order to ensure leak monitoring, Richter recom-
mends the combination of the safety stuffing box with
awarning connection.
If only the safety stuffing box is present, do not
tighten it so that any leak becomes visible.
Otherwise the valve may be destroyed by an
unnoticed internal leak.
9.3.2 Monitoringconnection
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 10.10.

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 16
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9.3.3 Proximityswitch
The proximity switch reliably indicates the closed
position of the valve disc. The signal penetrates the
thick-walled lining.
9.4 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
1.8.
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 EN 12266-1
respectively MSS SP-67.
For detailed installation and inspection regulations see
QM No. 0910-08-1005, available from Richter on
request.
10 Drawings
10.1 Legend
120 shell
221 disc/stemunit
229 guidepin
(up to. DN 150 / 6“ inclusive)
300 plainbearing
400/1 o-ring
405 thrustring
409 bodylining
412 pressuregasket
518 cup spring assembly
521 flexibleinlay
532 groundinggrope
901/x hex.screw
914/1 hex. socket screw
918/1 threadedrod
920/2 hex. nut (series NKL)
920/1 hex.nut
936/1 toothedlockwasher
Lever assembly
235 leverassembly
517 scraperring
519 throttlingplate
901/2 hex.screw
920/1 hex.nut
Worm gear
857 warmgear
Actuator
510 bracket
517 scraperring
804 coupling
850 actuator
980/2 round head grooved pin
Option safety stuffing box lever assemly
402/1 packingring
413 sealingfoil
503 spring gland follower
550 disc
901/3 hex. screw
Option safety stuffing box worm gear
402/1 packingring
413 sealingfoil
503 spring gland follower
510 lantern
550 disc
804 coupling
901/3 hex.screw
980/2 round head grooved pin
Option safety stuffing box actuator
402/1 packingring
413 sealingfoil
503 spring gland follower
550 disc
901/3 hex. screw
Option monitoring connection
407/1 sealring
938/1 hex. head screw plug

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 17
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10.2 Sectional drawing NK/F, DN 50 – 150, 2"– 6"
Double flange body, with lever assembly, disc/stem unit PFA-lined
*Only with option safety stuffing box.

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 18
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10.3 Sectional drawing NK/F, DN 200-300, 8"-12"
Double flange body, with lever assembly, disc/stem unit PFA-lined
DN 250-300, 10"-12" standard with warm gear
*Only with option safety stuffing box.

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 19
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10.4 Sectional drawing NKS/F, DN 50 – 150, 2"– 6"
Wafer-style body, with lever assembly, disc/stem unit PFA-lined
*Only with option safety stuffing box.

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F Page 20
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10.5 Sectional drawing NKS/F, DN 200-400, 8"-14"
Wafer-style body, with lever assembly, disc/stem unit PFA-lined
DN 250-400, 10"-14" standard with worm gear
*Only with option safety stuffing box.