Metso NELDISC LW Series Operating and maintenance manual

NELDISC®
Metal seated high performance
triple eccentric disc valve
Series LW, LG
Installation, Maintenance and
Operating Instructions
2 LW 70 en • 4/2011

22 LW 70 en
READ THESE INSTRUCTIONS FIRST!
These instructions provide information about safe handling and operation of the valve.
If you require additional assistance, please contact the manufacturer or manufacturer’s representative.
Addresses and phone numbers are printed on the back cover.
SAVE THESE INSTRUCTIONS!
Subject to change without notice.
All trademarks are property of their respective owners.
Table of Contents
1 GENERAL........................................................ 3
1.1 Scope of the manual..............................3
1.2 Valve description....................................3
1.3 Valve markings.......................................3
1.4 Technical specifications.........................4
1.5 Valve approvals......................................4
1.6 CE marking ............................................4
1.7 Recycling and disposal ..........................4
1.8 Safety precautions .................................4
2 TRANSPORTATION, RECEPTION
AND STORAGE............................................... 5
3 INSTALLATION ............................................... 5
3.1 General ..................................................5
3.2 Mounting into the pipeline......................5
3.3 Actuator..................................................8
4 COMMISSIONING ........................................... 8
5 SERVICE.......................................................... 9
5.1 General ..................................................9
5.2 Removing the valve from the pipeline....9
5.3 Replacing the gland packing..................9
5.4 Valve leakage.......................................10
5.5 Replacing the seat ring ........................10
5.6 Replacing the disc, shafts and bearings.11
5.7 Assembling the valve...........................11
6 DETACHING AND INSTALLING
THE ACTUATOR ........................................... 12
6.1 General ................................................12
6.2 Detaching the B1 series actuators.......12
6.3 Detaching the EC and EJ actuators.....12
6.4 Installing the B1 series actuator...........12
6.5 Installing EC and EJ actuators.............13
6.6 Detaching and installing other
actuator types.......................................14
6.7 Stop screw adjustment.........................14
7 TOOLS ........................................................... 16
8 ORDERING SPARE PARTS ......................... 16
9 EXPLODED VIEW AND PARTS LIST........... 19
10 DIMENSIONS AND WEIGHTS ...................... 20
10.1 Flange drilling and compatibility...........27
11 TYPE CODE................................................... 28

2 LW 70 en 3
1 GENERAL
1.1 Scope of the manual
This installation, operation and maintenance manual
provides essential information on series LW and LG
Neldisc®triple eccentric disc valves. The actuators and
instrumentation to be used with series LW and LG
valves are also discussed briefly. Refer to the separate
actuator and control equipment instruction manuals for
further information.
1.2 Valve description
Neldisc series LW are wafer type and series LG are lug
type metal seated triple eccentric disc valves.
The disc is elliptical and has a triple eccentric mount-
ing. When the valve is closed, the elliptical disc at the
major axis displaces the seat ring outward, causing the
seat ring to contact the disc at the minor axis. When the
valve is opened, the contact is released and the seat
ring returns to its original circular shape (see Fig. 1).
The disc is fitted to the shafts with pins and there are no
holes through the disc.
Construction details of individual valves are included in
the type code shown on the valve identification plate. To
interpret the type code, please refer to Section 11.
The valve operates both in control and shut-off applica-
tions.
1.3 Valve markings
Body markings are cast on the body. The valve also has
an identification plate attached to it (see Fig. 2).
Identification plate marking:
1. Body material
2. Shaft material
3. Trim material
4. Seat material
5. Maximum operating temperature
6. Minimum operating temperature
7. Maximum shut-off pressure differential
8. Type designation
9. Valve manufacturing parts list no.
10. Pressure class
NOTE:
Selection and use of the valve in a specific application
requires close consideration of detailed aspects. Due
to the nature of the product, this manual cannot cover
all the individual situations that may occur when
installing, using or servicing the valve.
If you are uncertain about the use of the valve or its
suitability for your intended use, please contact
Metso’s Automation business for more information.
Fig. 1. Construction of a triple eccentric disc valve
Fig. 2. Identification plate
BODY
TRIM
SHAFT
SEAT
TYPE
RATING
No.
t max.
t min.
ps
ATTENTION: READ INSTRUCTIONS BEFORE INSTALLATION OR SERVICING. CONTACT METSO AUTOMATION FOR COPY.
MADE BY METSO AUTOMATION
XXXX
(1) (9)(8)(6)(5)(3)
(2) (4) (7) (10)

42 LW 70 en
1.4 Technical specifications
Type: metal seated triple eccentric
disc valve
LW: wafer type
LG: lug type
Pressure class
Body: LW6L, LW7L, LG6L, LG7L:
PN 25, ISO PN 20, ASME150
LW8M, LG8M, LW5M, LG5M:
PN 40, ISO PN 50, ASME300
Trim: LW6L, LW7L, LG6L, LG7L:
Sizes DN 80-150: PN 25
Sizes DN 200-350: ISO PN 20
LW8M, LG8M, LW5M, LG5M:
PN 40, ISO PN 50
Temperature range: -200 °C... +600 °C
(over 600 °C, please contact
the manufacturer)
Flow direction: Free
Dimensions: See Section 10
Weights: See Section 10
1.5 Valve approvals
TA-Luft, chapter 3.1.8.4
Fire test to BS 6755 and API 607.
1.6 CE marking
The valve meets the requirements of the European
Directive 97/23/EC relating to pressure equipment, and
has been marked according to the Directive.
1.7 Recycling and disposal
Most valve parts can be recycled if sorted according to
material.
Most parts have material marking. A material list is sup-
plied with the valve. In addition, separate recycling and
disposal instructions are available from the manufac-
turer. A valve can also be returned to the manufacturer
for recycling and disposal against a fee.
1.8 Safety precautions
CAUTION:
Do not exceed the valve performance limitations!
Exceeding the limitations marked on the valve may
cause damage and lead to uncontrolled pressure
release.
Damage or personal injury may result.
CAUTION:
Do not dismantle the valve or remove it from the
pipeline while the valve is pressurized!
Dismantling or removing a pressurized valve will result
in uncontrolled pressure release. Always isolate the
relevant part of the pipeline, release the pressure from
the valve and remove the medium before dismantling
the valve.
Be aware of the type of medium involved. Protect peo-
ple and the environment from any harmful or poison-
ous substances. Make sure that no medium can enter
the pipeline during valve maintenance.
Failure to do this may result in damage or personal
injury.
CAUTION:
Beware of the discs cutting movement!
Keep hands, other parts of the body, tools and other
objects out of the open flow port. Leave no foreign objects
inside the pipeline.
When the valve is actuated, the disc functions as a cutting
device. The position of the disc can also be changed when
moving the valve.
Close and detach the actuator pressure supply pipeline for
valve maintenance.
Failure to do this may result in damage or personal injury.
CAUTION:
Beware of noise emissions!
The valve may produce noise in the pipeline. The
noise level depends on the application. It can be
measured or calculated using Metso Nelprof software.
Observe the relevant work environment regulations on
noise emission.
CAUTION:
Beware of a very cold or hot valve!
The valve body may be very cold or very hot during
use. Protect yourself against cold injuries or burns.
CAUTION:
When handling the valve or the valve package,
bear in mind its weight!
Never lift the valve or valve package by the actuator,
positioner, limit switch or their piping.
Place the lifting ropes securely around the valve body
(see Fig. 3).
Damage or personal injury may result from falling
parts.
NOTE:
Do not turn the disc more than 90° as this could dam-
age the seat. The valve is so constructed that the disc
operates only between 0-90°.

2 LW 70 en 5
2 TRANSPORTATION, RECEPTION
AND STORAGE
Check the valve and the accompanying devices for any
damage that may have occurred during transport.
Store the valve carefully before installation, preferably
indoors in a dry place.
Do not take the valve to the intended location and do not
remove the flow port protectors until the valve is installed.
The valve is delivered in the closed position. A valve
equipped with a spring-return actuator is delivered in a
position determined by the spring. During storage the
valve must be lightly closed.
3 INSTALLATION
3.1 General
Remove the flow port protectors and check that the
valve is undamaged and clean inside.
3.2 Mounting into the pipeline
Flush or blow the pipeline carefully before installing the
valve. Foreign particles, such as sand or pieces of
welding electrode, will damage the disc sealing sur-
face and seat.
The valve may be installed in any position and offers
tightness in both directions.
Install the valve in the pipeline so that the shaft is hori-
zontal if possible. However, we do not recommend
installing the valve with the actuator on the underside
because dirt in the pipeline may then enter the body
cavity and damage the gland packing.
If the valve is equipped with a flow balancing trim (type
code S-...), it must be on the down stream side of the
valve body. The valve must be mounted so that the per-
forated plate will not collect any impurities in the pipe-
line (see Fig. 4).
Select flange gaskets according to the operating conditions.
Do not attempt to correct pipeline misalignment by
means of flange bolting.
It may be necessary to firmly support the pipeline to
protect the valve from excess stress. Sufficient support
will also reduce pipeline vibration and this ensures
proper functioning of the positioner. Do not fasten sup-
ports to the flange bolting or to the actuator.
It is recommended that the length of any straight pipe pre-
ceding the control valve is at least 2 x pipe diameter.
The flow causes a so-called dynamic torque against
the valve disc which attempts to close the valve. In a
pipe elbow the pressure on the outer edge is higher
than on the inner edge.
When installing the triple eccentric disc valve immediately
after a pipe elbow, the valve shaft must be directed toward
the centre point of the pipe (see Fig. 5). This is especially
important when the valve is used as a control valve.
The valve shaft of a valve mounted after the centrifugal pump
must be perpendicular to the pump shaft (see Fig. 6).
When thus installed, the valve discs will be more evenly
loaded and vibrations otherwise possible in the inter-
mediate positions will be eliminated.
CAUTION:
When handling the valve or the valve package,
bear in mind its weight!
Follow the lifting methods shown in Fig. 3.
Fig. 3. Lifting of the valve
Fig. 4. Position of the flow balancing trim
Fig. 5. Mounting after a pipe elbow
Fig. 6. Mounting after the centrifugal pump
Flow direction
The recommended
position of the
perforated plate
is at the "top"
of the
pipeline

62 LW 70 en
Fig. 7. Minimum pipe inside dimensions
Table 1. Minimum pipe inside dimensions (mm)
Valve size
DN / NPS
D
LW6L, LW7L,
LG6L, LG7L
(mm / inch)
LW8M, LG8M,
LW5M, LG5M
(mm / inch)
80 / 3
100 / 4
125 / 5
150 / 6
200 / 8
250 / 10
300 / 12
350 / 14
400 / 16
69 / 2.71
90 / 3.54
112 / 4.41
144 / 5.67
193 / 7.60
243 / 9.56
290 / 11.42
329 / 12.95
374 / 14.72
69 / 2.72
90 / 3.54
112 / 4.41
143 / 5.63
190 / 7.48
241 / 9.49
287 / 11.30
321 / 12.64
315
Fig. 8. Stud bolt lenght
Table 2. Stud bolt dimensions, DIN flanges (mm)
LW6L
DN DIN PN 10 flange DIN PN 16 flange DIN PN 25 flange DIN PN 20 flange
Thread L Qty Thread L Qty Thread L Qty Thread L Qty
80 M16 130 8 M16 130 8 M16 150 8 M16 140 4
100 M16 140 8 M16 140 8 M20 170 8 M16 150 8
125 M16 150 8 M16 150 8 M24 190 8 M20 160 8
150 M20 160 8 M20 160 8 M24 200 8 M20 160 8
200 M20 170 8 M20 170 12 M24 210 12 M20 170 8
250 M20 180 12 M24 180 12 M27 220 12 M24 200 12
300 M20 190 12 M24 200 12 M27 230 16 M24 210 12
350 M20 190 16 M24 200 16 M30 260 16 M27 220 12
400 M24 220 16 M27 240 16 M33 270 16 M27 250 16
LW7L
DN DIN PN 10 flange DIN PN 16 flange DIN PN 25 flange DIN PN 20 flange
Thread L Qty Thread L Qty Thread L Qty Thread L Qty
80 M16 130 8 M16 130 8 M16 150 8 M16 140 4
100 M16 140 8 M16 140 8 M20 170 8 M16 150 8
125 M16 150 8 M16 150 8 M24 190 8 M20 170 8
150 M20 170 8 M20 170 8 M24 200 8 M20 180 8
200 M20 180 8 M20 180 12 M24 210 12 M20 180 8
250 M20 190 12 M24 190 12 M27 220 12 M24 200 12
300 M20 200 12 M24 210 12 M27 230 16 M24 210 12
350 M20 200 16 M24 210 16 M30 260 16 M27 230 12
400 M24 220 16 M27 240 16 M33 270 16 M27 250 16
LW8M
LW5M
DN
DIN PN 25 flange DIN PN 40 flange DIN PN 50 flange
Thread L Qty L1 Qty Thread L Qty L1 Qty Thread L Qty L1 Qty
80 M16 180 8
Stud bolts pass the
body in the neck
area (length L)
M16 180 8
Stud bolts pass the
body in the neck
area (length L)
M20 190 8
Stud bolts pass the
body in the neck
area (length L)
100 M20 190 8 M20 180 8 M20 200 8
125 M24 210 8 M24 200 8 M20 210 8
150 M24 220 8 M24 210 8 M20 220 12
200 M24 230 12 M27 240 12 M24 250 12
250 M27 270 12 M30 280 12 M27 300 12 170 8
300 M27 270 12 140 8 M30 290 12 150 8 M30 310 12 160 8
350 M30 300 12 150 8 M33 320 12 160 8 M30 330 16 160 8
400 M33 320 12 160 8 M36 350 12 170 8 M33 350 16 160 8

2 LW 70 en 7
Table 2. continued
LG6L
DN DIN PN 10 flange DIN PN 16 flange DIN PN 25 flange DIN PN 20 flange L4
Thread L2 Qty L3 Qty Thread L2 Qty L3 Qty Thread L2 Qty L3 Qty Thread L2 Qty L3 Qty
80M16608708M16608708M16658758M1665475416
100M16658758M16658758M20758858M1670880819
125M16708808M16708808M24808908M2075885820
150M20758858M20758858M24858958M2075885820
200 M20 80 8 90 8 M20 80 12 90 12 M24 90 12 100 12 M20 80 8 90 8 23
250 M20 85 12 95 12 M24 85 12 95 12 M27 95 12 105 12 M24 95 12 105 12 26
300 M20 90 12 100 12 M24 95 12 105 12 M27 105 16 115 16 M24 100 12 11 12 30
350 M20 90 16 100 16 M24 95 16 105 16 M30 11 16 120 16 M27 105 12 115 12 35
400 M24 100 16 120 16 M27 110 16 130 16 M33 125 16 145 16 M27 115 16 135 16 38
LG7L
DN DIN PN 10 flange DIN PN 16 flange DIN PN 25 flange DIN PN 20 flange L4
Thread L2 Qty L3 Qty Thread L2 Qty L3 Qty Thread L2 Qty L3 Qty Thread L2 Qty L3 Qty
80M16608708M16608708M16658758M1665475416
100M16658758M16658758M20758858M1670880819
125 M16 65 8 85 8 M16 65 8 85 8 M24 80 8 100 8 M20 75 8 95 8 20
150 M20 75 8 95 8 M20 75 8 95 8 M24 85 8 105 8 M20 80 8 100 8 20
200 M20 80 8 100 8 M20 80 12 100 12 M24 90 12 110 12 M20 80 8 100 8 23
250 M20 85 12 105 12 M24 85 12 105 12 M27 95 12 115 12 M24 90 12 110 12 26
300 M20 90 12 110 12 M24 95 12 115 12 M27 105 16 125 16 M24 95 12 115 12 30
350 M20 90 16 110 16 M24 95 16 115 16 M30 110 16 130 16 M27 105 12 125 12 35
400 M24 100 16 120 16 M27 110 16 130 16 M33 125 16 145 16 M27 115 16 135 16 38
LG8M
LG5M
DN
DIN PN 25 flange DIN PN 40 flange DIN PN 50 flange L4
Thread L2 Qty L3 Qty Thread L2 Qty L3 Qty Thread L2 Qty L3 Qty
80 M16 65 8 95 8 M16 65 8 95 8 M20 75 8 105 8 16
100 M20 70 8 100 8 M20 70 8 100 8 M20 75 8 105 8 19
150 M24 85 8 115 8 M24 85 8 115 8 M20 85 12 115 12 25
200 M24 90 12 120 12 M27 100 12 130 12 M24 105 12 135 12 34
250 M27 110 12 140 12 M30 120 12 150 12 M27 125 16 155 16 42
300 M27 110 16 140 16 M30 120 16 150 16 M30 135 16 165 16 45
350 M30 125 16 155 16 M33 135 16 165 16 M30 145 20 175 20 50
400 M33 135 16 165 16 M36 150 16 180 16 M33 155 20 185 20 55
Table 3. Stud bolt dimensions, ASME flanges (inch/mm)
LW_
NPS / DN
LW6L, LW7L, ASME 150 flange LW5M, ASME 300 flange
Thread L Qty Thread L Qty L1 Qty
3 / 80 5/8 UNC 6.30 / 160 4 3/4 UNC 7.87 / 200 8
Stud bolts pass the
body in the neck area
(length L)
4 / 100 5/8 UNC 6.69 / 170 8 3/4 UNC 8.26 / 210 8
5 / 125 3/4 UNC 7.48 / 190 8 3/4 UNC 8.66 / 220 8
6 / 150 3/4 UNC 7.87 / 200 8 3/4 UNC 9.05 / 230 12
8 / 200 3/4 UNC 7.87 / 200 8 7/8 UNC 10.23 / 260 12
10 / 250 7/8 UNC 8.66 / 220 12 1 UNC 11.81 / 300 14 6.69 / 170 4
12 / 300 7/8 UNC 9.05 / 230 12 1 1/8-8 UN 12.20 / 310 12 6.30 / 160 8
14 / 350 1 UNC 9.84 / 250 12 1 1/8-8 UN 12.99 / 330 16 6.30 / 160 8
16 / 400 1 UNC 10.63 / 270 16 1 1/4-8 UN 14.17 / 360 16 6.69 / 170 8
LG_
NPS / DN
LG6L, ASME 150 flange LG5M, ASME 300 flange
T h r e a d L 2 Q t y L 3 Q t y L 4 T h r e a d L 2 Q t y L 3 Q t y L 4
3 / 80 5/8 UNC 2.36 / 60 4 3.15 / 80 4 0.63 / 16 3/4 UNC 2.75 / 70 8 3.54 / 90 8 0.63 / 16
4 / 100 5/8 UNC 2.56 / 65 8 3.34 / 85 8 0.75 / 19 3/4 UNC 2.95 / 75 8 3.74 / 95 8 0.75 / 19
5 / 125 3/4 UNC 2.75 / 70 8 3.54 / 90 8 0.78 / 20 - - - - - -
6 / 150 3/4 UNC 2.75 / 70 8 3.54 / 90 8 0.78 / 20 3/4 UNC 3.54 / 90 12 3.93 / 100 12 0.98 / 25
8 / 200 3/4 UNC 2.95 / 75 8 3.74 / 95 8 0.90 / 23 7/8 UNC 4.33 / 110 12 4.33 / 110 12 1.34 / 34
10 / 250 7/8 UNC 3.34 / 85 12 4.13 / 105 12 1.02 / 26 1-8 UN 4.92 / 125 16 4.92 / 125 16 1.65 / 42
12 / 300 7/8 UNC 3.54 / 90 12 4.33 / 110 12 1.18 / 30 1 1/8 UN 5.31 / 135 16 5.31 / 135 16 1.77 / 45
14 / 350 1-8 UN 4.13 / 105 12 4.92 / 125 12 1.37 / 35 1 1/8 UN 5.51 / 140 20 5.51 / 140 20 2.20 / 56
16 / 400 1-8UN 4.52 / 115 16 5.31 / 135 16 1.49 / 38 1 1/4-8 UNC 6.30 / 160 20 6.69 / 170 20 2.40 / 61

82 LW 70 en
When mounting the valve it must be in a closed position
and be carefully centred between the pipe flanges so
that the turning disc does not touch the pipe edge or
flange gaskets.
In valves with certain nominal sizes some flange bolts
do not pass the valve body. The valve body is thus
equipped with holes, see Fig. 2 and Tables 2...4.
Ensure that the disc can turn to the open position after
preliminary tightening of the flange bolts. The actuators
of control valves can be equipped with position stops
which usually only allow the disc to open 80°.
Lenght of stud bolts in Table 2 are based on:
❑gasket thickness of 1.5 mm
❑heavy nuts with washers
❑flange thickness of weldneck flanges per DIN or
ISO
3.2.1 Valve insulation
If necessary, the valve may be insulated. Insulation
must not continue above the upper level of the valve
body, see Figure 9.
3.3 Actuator
When installing the actuator on the valve, make sure
that the valve package functions properly. See instruc-
tions for installing in Section 6.
Observe the space needed for removal of the actuator.
The upright position is recommended for the actuator
cylinder.
The actuator must not touch the pipeline, because
pipeline vibration may damage it or interfere with its
operation.
In some cases, e.g. when a large-size actuator is used
or when the pipeline vibrates heavily, supporting the
actuator is recommended.
Please contact Metso’s Automation business for further
information.
4 COMMISSIONING
Ensure that no dirt or foreign objects are left inside the
valve or pipeline. Flush the pipeline carefully. Keep the
valve 30-40° open during flushing.
When starting up the pump, ensure that the valve in the
pipeline is closed or, at the very most, 20° open.
A waterhammer, which follows the start-up of high-
capacity pumps, creates a torque peak in the disc. This
can damage the pin connection between disc and
shaft when the valve is 30-90° open.
The packing construction is live loaded. So tightening
the packing screws during service is not necessary.
Table 4. Stud bolt dimensions, ISO flanges (mm)
LW_
DN
LW6L, ISO PN 20 flange LW5M, ISO PN 50 flange
Thread L Qty Thread L Qty L1 Qty
80 M16 140 4 M20 160 8 Stud bolts pass the
body in the neck area
(length L)
100 M16 150 8 M20 170 8
125 M20 160 8 - - - - -
150 M20 160 8 M20 190 12 Stud bolts pass the
body in the neck area
(length L)
200 M20 170 8 M24 220 12
250 M24 190 12 M27 250 14 100 4
300 M24 200 12 M30 270 12 120 8
350 M27 230 12 M30 280 16 120 8
400 M27 250 16 M33 330 16 140 8
LG_
DN
LG6L, ISO PN 20 flange LG5M, ISO PN 50 flange
Thread L2 Qty L3 Qty L4 Thread L2 Qty L3 Qty L4
80M1660480416M2070890816
100M1665885819M2075895819
125M2070890820------
150 M20 70 8 90 8 20 M20 90 12 100 12 25
200 M20 75 8 95 8 23 M24 110 12 110 12 34
250 M24 85 12 105 12 26 M27 125 16 125 16 42
300 M24 90 12 110 12 30 M30 135 16 135 16 45
350 M27 105 16 125 16 35 M30 140 20 140 20 56
400 M27 115 16 135 16 38 M33 160 20 170 20 61
Fig. 9 Insulation of the valve
Insulation limit

2 LW 70 en 9
5 SERVICE
5.1 General
Triple eccentric disc valves require no regular mainte-
nance. If the valve should require maintenance for
some reason, a few simple service measures are nor-
mally sufficient.
The numbers in parentheses refer to the parts list and
the exploded view of the valve in Section 9.
5.2 Removing the valve from the pipeline
It is generally most convenient to detach the actuator
and its auxiliary devices (see Section 6), before remov-
ing the valve from the pipeline. If the valve package is
small or difficult to access, it may be more practical to
remove the entire package at the same time.
Ensure that the valve is not pressurized and the pipe-
line is empty. Ensure that the medium cannot flow into
the section where servicing is to take place. The valve
must be in a closed position when removing.
Support the valve carefully with a hoist. Place ropes
carefully and unscrew the pipe flange bolts. Ensure that
the ropes are positioned correctly. Lift valve correctly
(see Fig. 3).
5.3 Replacing the gland packing
PTFE V-rings are used as a standard gland packing and
graphite rings for high temperature constructions. The
packing construction is live loaded as standard.
The gland packing (20) must be changed if leakage
occurs even after the hex nuts (25) have been tightened
as recommended.
❑Make sure the valve is not pressurized.
❑Unfasten the nuts (25) and remove the disc spring
(TA-Luft) sets (43), the retaining plates (42) and
the gland (9).
❑Remove old packing rings (20). Do not damage the
surfaces of the packing ring counterbore and shaft.
It is not necessary to change anti-extrusion ring (22).
❑Clean the gland packing and packing ring coun-
terbore. Install new set of packings (V-ring or
graphite). Slip the rings onto the shaft. Ensure
that there are no burrs in the keyway groove
which could damage the packing.
❑Install the gland.
❑Mount the retaining plates with the text UPSIDE
on top (see Fig. 10).
❑Mount the disc spring sets.
❑Place the nuts on the studs.
❑Pre-compress the gland packing by tightening
the nuts with a tool until the disc springs have
value of compression (h1–h2) as in Table 5.
❑Carry out 3…5 operation cycles with the valve.
Suitable range of movement is about 80 %.
It is not necessary to fully close or open the valve
during the operation.
❑Unfasten the nuts and disc springs.
❑Measure the height h1of the disc springs and
use these values as a basis when defining the
final height of the springs (as compressed condi-
tion).
❑Re-install the disc springs and tighten the nuts
with the tool. Tighten the nuts until the set value
of compression (h1–h2) of disc springs is
achieved, see Table 5.
CAUTION:
Observe the safety precautions listed in Section
1.8 before starting work!
CAUTION:
For safety reasons the retaining plates MUST always
be installed according to Section 5.3.
NOTE:
If you send the valve to the manufacturer for repair, do
not dismantle it. Clean the valve carefully, including
the inside. For safety reasons, inform the manufacturer
of the type of medium used in the valve.
NOTE:
Always use original spare parts to ensure that the
valve functions as intended.
CAUTION:
Do not dismantle the valve or remove it from the
pipeline while the valve is pressurized!
CAUTION:
Do not dismantle the valve or remove it from the
pipeline while the valve is pressurized!
Fig. 10. Mounting the retaining plate
Table 5. Tightening of gland packing
LW6L,
LG6L,
LW7L,
LG7L
LW8M,
LG8M,
LW5M,
LG5M
Springset
dia Thread Compression(h1–h2), mm
Packing ring material
DN DN mm M Graphite+
PTFE PTFE
80 80 20 M8 2.0 1.0
100, 125, 150 100, 125 20 M8 2.5 1.5
200 150 25 M10 2.5 1.5
250 25 M10 3.0 1.5
300 200 25 M10 3.0 2.0
350 25 M10 3.0 2.0
400 250 35.5 M14 4.0 3.0
300 35.5 M14 4.5 3.0
350, 400 35.5 M14 4.5 3.0

10 2 LW 70 en
❑If the leakage still occurs when the valve is pres-
surized, re-tighten the nuts but don't exceed the
values in the Table 5 by 50 % or do not fully com-
press the disc springs.
5.4 Valve leakage
Valve leakage is not always caused by a damaged seat
ring or disc. The reason can also be that the disc is not
in the closed position.
❑Check the position of the actuator relative to the
valve. The screws may be loose or the bracket
damaged.
❑Check the adjustment in the closed position (see
Section 6.4).
The marking line parallel to the disc on the valve shaft
head shows roughly the closed position of the disc (see
Fig. 12).
Pressure shocks can cause loosening of the pin con-
nection between disc and shaft; consequently the shaft
moves while the disc remains in place and this prevents
full closing of the disc.
If the reason for the leakage does not become appar-
ent after doing the above, the valve must be disassem-
bled for replacing the parts.
5.5 Replacing the seat ring
❑Ensure that the valve is not pressurized.
❑Remove the valve from the pipeline. The valve
must be in a closed position during removal.
Follow the lifting methods shown in Section 3.
❑Remove the clamp ring (2) by untightening the
screws (27).
❑Remove the old body seal (19) and the seat ring
(4). Change the seat ring if it is damaged.
❑Clean all the surfaces of the seats and check the
surface of the seat ring.
❑Check also the condition of the disc. A damaged
disc must be changed (see Section 5.6).
❑Check the condition of the pin connection.
Repair it if necessary (see Section 5.6).
❑Mount a new, self-adhesive body seal (19) into
the body. The surface must be clean and free of
grease. Handle the ends of the seal according to
Fig. 13.
❑Spray a thin layer of dry lubricating fluid, e.g.
Molykote 321R or equivalent, into the seat
groove, surfaces of the clamp ring and seat ring.
❑Centre the seat ring (4) carefully into its groove and
turn the disc to maintain light contact with the seat.
❑Mount the clamp ring and tighten the screws (27) lightly.
❑Turn the disc slightly open and pull it back to set
the seat into the proper position.
❑Tighten the screws (27) crosswise and evenly.
Recommended torque values for screws are listed
in Table 6. An unevenly tightened flange may
damage the seat ring. The screw heads must be
below the flange surface in lug type valves.
❑Check the position between the seat ring and the
disc. The valve closes clockwise (see Fig. 12).
❑Mount the actuator into the valve. Adjust the
closed position limit and check the open position
limit (see Section 6.4).
Fig. 11. Gland packing
Fig. 12. Open and closed positions of the valve
CAUTION:
Do not dismantle the valve or remove it from the
pipeline while the valve is pressurized!
retainer plate (42)
stud (24)
hexagon nut (25)
disc spring set (44)
packing (20)
V-ring set or
graphite packing
gland (9)
anti-extrusion ring (22)
dia
h1
h2
open
closed
Fig. 13. Mounting the body seal
Table 6. Clamp ring screw torque
Screw Torque, Nm
M6 9
M8 16
M10 25
M12 37
M14 50
M16 70

2 LW 70 en 11
5.6 Replacing the disc, shafts and bearings
5.6.1 Disassembling the valve
The pin connection of the disc must be opened by drilling for
changing the disc (3), shafts (11, 12) and bearings (15, 16).
❑Remove the valve from the pipeline and the actu-
ator from the valve.
❑Remove the clamp ring (2) and seat ring (4)
according to section 5.4.
❑Set the valve horizontally on a sturdy surface so
that the flat side of the disc lays against the sur-
face (see Fig. 14).
❑Drill the holes carefully to the centre of the pins
(14). Choose a drill 0.2-0.5 mm smaller than the
diameter of the pin.
❑Drill the holes deep, but not enough to reach the
disc.
❑Pull the pins out.
❑Dismantle the gland packing including anti-extrution-
ring (22) and sheet ring (21) according to Section 5.3.
❑Detach the screws (26) and the blind flange (10)
and remove the gasket (18).
❑Place rubber strips or other protection between
the disc edge and the body and remove the
shafts (see Fig. 15).
❑Remove the bearings (15, 16).
❑Clean and check all parts carefully.
5.7 Assembling the valve
❑Replace damaged parts with new ones.
❑Set the disc and the shaft together beforehand. In
case the pin holes have been damaged during
removal of the old pins the holes can be drilled to a
larger pin size. File off any burrs from the shafts.
The bearing material of the standard construction
valves is PTFE-impregnated stainless steel net.
The bearings for the high temperature valves (N and H-
constructions) are cobalt alloy bushings which are
mounted into the body together with the shafts.
❑Mount the bearings into the body (see Fig. 16).
❑High temperature-construction: Mount the bear-
ing into the shaft. Spray a thin layer of dry lubricat-
ing fluid, e.g. Molykote 321R or equivalent, into the
inside surface of the bushing and the shaft bearing
groove. Press the bushing with a tightening ring
into the shaft bearing groove and fit the shaft with
the bearings carefully into the body through the
tightening ring (see Fig. 17).
❑Place the disc horizontally on a surface so that
the flat side of the disc lays against the surface.
Lift the body around the disc so that the shaft
bores are aligned with the bores in the disc. Pro-
tect the disc (see Fig. 15).
❑Press the shafts into the disc drillings. Align the
pin holes. The shaft (11) position against the disc
must be according to Fig. 12.
❑Support the disc well in a horizontal position dur-
ing mounting of the pins. Push the new pins into
the holes and press them in a press to final form
Fig. 14. Drilling the pins
Fig. 15. Protecting the disc during disassembly and assembly
Fig. 16. Mounting the standard bearings
Fig. 17. Mounting the metal bearings
NOTE:
Use only pins supplied by the manufacturer!
NOTE:
The pins must be pressed with enough force to deform
them so that the connection will be free from backlash.

12 2 LW 70 en
(see Fig. 18). Use a smaller tool than the pin
diameter. See Table 7 for forces.
❑Install the gasket (18) and the blind flange (10).
Screws of the blind flange must be tightened evenly.
An unevenly tightened flange will damage the seat.
❑Install the seat ring. See details in Section 5.5.
❑Install the body seal (19) and the clamp ring (2).
See details in Section 5.5.
❑Install the gland packing (see Section 5.3).
❑Check the contact line between the seat ring and
the disc (see Fig. 12).
6 DETACHING AND INSTALLING THE
ACTUATOR
6.1 General
The actuator is factory-mounted on the valve and the
stroke limit stop screws are adjusted in advance.
6.2 Detaching the B1 series actuators
❑Disconnect the actuator from its power source;
detach the air supply pipe and control signal
cables or pipes from their connectors.
❑Unscrew the bracket screws.
❑Detach the actuator using a suitable extractor.
The correct tool can be ordered from the manu-
facturer (see Fig. 19).
❑Remove the bracket and coupling, if any.
6.3 Detaching the EC and EJ actuators
❑Disconnect the actuator from its power source;
detach the air supply pipe and control signal
cables or pipes from their connectors.
❑First detach the positioner, or any other accessory,
from the actuator, and detach the coupling plate from
the drive shaft. Next, the bushing is loosened by turn-
ing the tightening screw counter-clockwise. The tight-
ening screw also acts as an extractor. It is highly
recommended to use a suitable bushing from the
tool set H061544 between the tightening screw
(I) and drive shaft. The bushing dimensions are
given in Table 8.
❑Detach the actuator finally from the valve after the
screws that attach the actuator to the valve have
been removed.
6.4 Installing the B1 series actuator
❑Turn the valve to the closed position before
mounting the actuator.
Fig. 18. Pressing the pins
Table 7. Pressing the pins, forces
Pin diameter,
mm Force, kN Pin diameter, mm Force, kN
54510125
66012180
88015280
CAUTION:
When handling the valve or the valve package,
bear in mind its weight!
CAUTION:
The actuator must not be removed from the valve
in a pipeline under pressure as result of dynamic
torque!
CAUTION:
Do not detach a spring-return actuator unless a
stop-screw is carrying the spring force!
NOTE:
Do not turn the disc more than 90° as this could dam-
age the seat. The valve is so constructed that the disc
operates only between 0-90°.
NOTE:
Before dismantling, carefully observe the position of
the valve with respect to the actuator and positioner/
limit switch so as to ensure that the package can be
properly reassembled.
Fig. 19. Pressing the pins
Fig. 20. Detaching the EC/EJ actuator

2 LW 70 en 13
❑Clean the shaft and the shaft bore and file off any
burrs which could interfere with mounting. Pro-
tect the joint surfaces from corrosion, e.g. with
Cortec VCI 369.
❑If a bushing is required between the actuator
shaft bore and the valve shaft, mount it first in the
actuator shaft bore.
❑The valve keyway is on the side opposite the flat
side of the disc. The actuator shaft bore has two
keyways set 90° apart.
❑For double-acting cylinder actuator, B1C, and
spring-return cylinder actuator, B1J (spring-to-
close), choose the keyway which establishes the
piston in its upper position (at the top end of the
cylinder) when the valve is closed.
In the spring-return cylinder actuator B1JA
(spring-to-open), choose the keyway which
establishes the piston in its lower position when
the valve is open.
❑Check visually that the actuator is correctly posi-
tioned relative to the valve. Tighten all the fasten-
ing screws as tightly as possible.
❑Adjust the stop screws to the closed position
(see Section 6.7).
❑The opening angle in a control valve can be lim-
ited by a stop screw to 80°. The opening angle of
a shut-off valve is 90°.
❑When a shaft extension is required, the sizing of
the shaft extension must be discussed with the
valve manufacturer.
6.5 Installing EC and EJ actuators
The actuator is attached to a bracket via an ISO 5211
standard mounting interface. The actuator is adapted
to the valve shaft with a separate bushing. The bushing
(II + II) is a two-piece cone-shaped bushing, which is
tightened firmly with a tightening screw (I) around the
valve shaft.
❑Mount the bushing and the tightening screw from
the mounting interface side of the actuator,
according to Fig. 23. Insert cylindrical pins (III) in
the bushing slots, these must be directed into the
corresponding slots in the actuator during tight-
ening. Before the installation of the bushing and
the tightening screw, remove impurities such as
old threadlocking material from the threads of the
tightening screw, and apply Loctite 243 or similar
threadlock carefully to the threads, as shown in
Fig. 23. Turn the tightening screw from inside the
actuator shaft using a suitable hex key, Fig. 23.
❑Prior to installation, the correct shaft position of
the valve has to be checked. In the key-type
bushing there are four keyways, two of which are
intended for valves with DIN key and two for
valve shafts with ANSI key. The DIN keyway is
located in the split between the bushing halves,
and the ANSI keyway is located in the middle of
the half bushing. Fig. 22 shows the keyway posi-
tion when the actuator is in a closed position.
❑The open or closed positions of the actuator can
be identified either by using compressed air, see
Fig. 20, or by checking the position of the pointer
at the end of the drive shaft. The actuator is closed
if the pointer on the coupling plate is transverse to
the direction of the actuator’s main shaft.
❑In the bushing having blade head connection
checking the right position is more simple. Use
the pointer in the end of the drive shaft to see the
correct position.
❑Mount the actuator to the valve bracket with four
screws. The tightening screw of the bushing
should be loosened before mounting, to allow
the shaft to fit easily into the actuator.
❑The actuator construction allows axial movement
of the drive shaft. Check, before the screw is
tightened, that the drive shaft is in the upper
position of its axial movement, which is its normal
position (the mounting position shown in Fig. 23).
Checking is important, as the actuator shaft
drops down slightly when the screw is tightened.
The drive shaft axial movement can be observed
and measured before attachment to a valve. The
actuator drive shaft is in the upper position when
its upper surface conforms to Table 9 (see Fig.
23).
Table 8. Bushing dimensions
Actuator Outer dim.
(mm) Inner dim. (mm) Height (mm)
EC/EJ05 24,5 12,5 15
EC/EJ07 24,5 16,5 32,75
EC/EJ10 24,5 20,5 45
EC/EJ12
Fig. 21. Actuator connections
Closing pressure
Stop screw for
open position
Stop screw for
closed position
Opening
pressure
Fig. 22. Keyway positions on the actuator
DIN keyways at bushing
split
ANSI keyways in the
middle of bushing
ACTUATOR IN CLOSED POSITION

14 2 LW 70 en
❑The drive shaft will automatically find its correct
position when the tightening screw is tightened, if
the installation tool is used (see Figure 23). The
installation tool is attached instead of the coupling
plate using M4 screws with the drive shaft in upper
position (before the valve is installed). Tighten the
screws in such a way that the tool is tightened
against the upper surface of the housing.
❑Install the actuator on the valve and attach the
attachment screws normally. Finally, tighten the tight-
ening screw according to Table 9. The required
torque is also marked on a plate close to the drive
shaft on the actuator housing. The installation tool is
removed, and the coupling plate is reattached. The
valve may malfunction if the tightening of the
connection has been carried out improperly.
❑Finally, the extreme positions of the valve are
adjusted with the stop screws at the ends of the
actuator. The location of the screws for adjusting
the Close and Open positions of the valve are
marked with letters on the ends of the actuator
housing (see Figure 21).
6.6 Detaching and installing other
actuator types
See actuator’s manual for details.
6.7 Stop screw adjustment
6.7.1 General
Close the metal seated triple eccentric disc valve by
turning the disc with a torque against the seat. Choose
the torque from Tables 11 and 12 for adjusting the stop
screw to the closed position of the actuator. Try not to
exceed the given values since excessive torque would
strain the seat and the joint between the disc and the
shaft. Always readjust the stop screw after changing
the seat and after mounting the actuator.
6.7.2 Actuators other than tabulated
Close the valve as per the tabulated torque Mc and
adjust the stops accordingly. Note the increased torque
created by the actuator while the valve is closed.
6.7.3 Changing the mounting position
Always remove the actuator from the valve shaft before
mounting it into another key groove. Readjust the
closed position limit as instructed.
If manually operated, the valve should close when the
handwheel is turned clockwise. In a double-action cyl-
inder, the piston must be in the upper position of the
cylinder when the valve is closed. In this position the
actuator creates maximum torque. Do not turn the
disc more than 90° as this could damage the seat.
Fig. 23. Cone bushing installation
Fig. 24. Tightening of the cone bushing
Table 9. Mounting faces, tightening screws and drive
shaft clearances
Size Mounting Thread Key Nm ~X
upperpos.
(mm)
~X
lowerpos.
(mm)
EC/EJ05 F05 M12 6 25 4.0 1
EC/EJ07 F07 M16 8 50 1.5 -2
EC/EJ10 F10 M20 10 100 2.5 -2
EC/EJ12 F12 M24 14 200 3.5 -2
EC/EJ14 F14 M36 19 700 4.5 -2
Loctite 225
or similar
Key
Installation tool
NOTE:
Metso accepts no responsibility for compatibility of actu-
ators not installed by Metso.
CAUTION:
The actuator must not be removed from the valve
in a pipeline under pressure as result of dynamic
torque!
Fig. 25. Changing the mounting position

2 LW 70 en 15
6.7.4 Double-acting cylinder actuator B1C
❑Apply the tabulated shut-off pressure Pc to the air
connection at the cylinder base.
❑With the stop screw removed, check through the
air connection hole that the piston does not touch
the cylinder end. If it does, loosen the bracket
screws and turn the actuator clockwise to
increase the adjusting margin.
❑Turn the closed position stop screw until it
touches the piston, then turn back 1/4 turn and
lock up. An O-ring is used for leakproofing the
stop screw.
❑An extra long screw is needed for opening
angles < 80°.
6.7.5 Double-acting diaphragm actuator EC
Follow instructions given in Section 6.7.4. See also Fig. 21.
6.7.6 Spring-return cylinder actuator B1J
"Spring-to-close"
❑Before mounting the cylinder, screw in the closed
position stop screw completely.
❑The table indicates *) spring when the spring-
created torque does not exceed the maximum
permitted closing torque Mc. Otherwise, apply
the tabulated pressure Pc into the air connection
at the cylinder end against the spring force. The
stop screw must not be removed when the
cylinder is pressurized! Open the stop screw
until it does not touch the piston.
❑Turn the closed position stop screw until it
touches the piston, then turn back 1/4 turn and
lock up. An O-ring is used for leakproofing the
stop screw.
❑After adjusting, check the adjusting margin
through the air connection hole. The piston must
not touch the cylinder end. If necessary, increase
the margin by loosening the bracket screws and
turning the actuator clockwise.
❑An extra long screw is needed for opening
angles < 80°.
6.7.7 Spring-return cylinder actuator B1JA
"Spring-to-open"
❑The actuator being unpressurized the valve is
open. Unscrew the close limit stop screw (actuator
housing). Apply tabulated shut-off pressure Pc to
the air connection at the cylinder bottom end
against the spring force to close the valve.
❑Check through the stop screw hole that the piston
rod does not touch the cylinder top end. If it does,
loosen the bracket screws and turn the actuator
clockwise to increase the adjusting margin.
❑Turn the closed position stop screw until it touches
the piston, then turn back 1/4 turn and lock up. An
O-ring is used for leakproofing the stop screw.
❑An extra long screw is needed for opening
angles < 80°.
6.7.8 Spring-return diaphragm actuator EJ
"Spring-to-close"
Follow instructions given in Section 6.7.6. See also Fig. 21.
"Spring-to-open"
Follow instructions given in Section 6.7.7. See also Fig. 21.
6.7.9 M-series operator
❑Close the valve as per the tabulated primary
torque M1 (handwheel torque) given in Tables 11
and 12.
❑Tighten the closed position stop screw until it
touches the linkage, then turn back 1/4 turn and
lock up with Loctite 225.
Fig. 26. Cylinder actuator, series B1C
Stop screw for the
closed position
Stop screw for
the open
position
Fig. 27. Cylinder actuator, series B1J
Fig. 28. Cylinder actuator, series B1JA
Fig. 29. Actuator, series M
Stop screw for the
closed position
Stop screw for
the open
position
Stop screw for the
closed position
Stop screw for
the open
position
Stop screw for the
closed position
Stop screw for the
open position

16 2 LW 70 en
6.7.10 Hand lever RH
❑Mount the hand lever on the valve, but do not fas-
ten hex screws (A). Turn the lever using force F in
Table 10.
❑When closing torque is applied, turn the housing
(B) cog of the closing limit to contact with the
lever arm. Fasten hex screws (A).
6.7.11 Electric operator
Instructions for adjustment are given in a separate leaf-
let, code D304568, which is available from the manu-
facturer.
7TOOLS
No special tools are needed for servicing the valve.
However, we recommend an extractor for removing the
actuator from the valve. The tool can be ordered from
the manufacturer.
8 ORDERING SPARE PARTS
When ordering spare parts, always include the follow-
ing information:
❑type code, sales order number, serial number
(stamped on a valve body)
❑number of the parts list, part number, name of
the part and quantity required
This information can be found from the identification
plate or documents.
Fig. 30. Hand lever, series RH
Table 10. Hand lever RH, adjustment values
Size L L1 Torque Force
DN mm mm Nm Lbf ft N Lbf
80 400 350 40 30 115 26
100 400 350 70 52 200 45
125 400 350 100 74 285 63
150 500 450 135 100 300 67
Fig. 31. Electric operator

2 LW 70 en 17
Table 11. Series LW6L, LW7L, LG6L and LG7L,
closing torques
DN
SIZE Mc BC and BJ
SIZE BC
pc BJ
pc BJA**)
pc BJK
pc BJKA**)
pc BJV
pc BJVA**)
pc EC and EJ
SIZE EC
pc EJ
pc EJA**)
Lpc Q-P
actuator Spring to
close Spring to
open Manual
operator Input
torque M1
(Nm) (lbf ft) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (Nm) (lbf ft)
80
3" 45 33
62.536 5 QP2C0.693.652 M07 4 3 8 2.1 30 0.7 10 3.3 48 0.3 4 2.8 41 1.1 16 4 58 7 3.4 49 0.1 1 4.2 61 QP3C 1.1 16 3.2 46 AR11 4 3
10 1.6 23 1.1 16 2.8 41 0.7 10 2.2 32 1.6 23 3.4 49 10
100
4" 75 55
64.159 5QP2C4.362M0775 8 3.4 49 0.2 3 3.8 55 *)spring 3.3 48 0.6 9 4.6 68 7 QP3C 0.8 12 3.5 51 AR11 6 4
92.130 10 2.3330.7103.754
10 1.9 28 0.9 13 3.1 45 0.5 7 2.6 38 1.4 20 3.7 54 12 11 1.1 16 14
125
5" 110 80
6687 5 QP3C0.343.957 M07 10 7 8572
*)spring 4.5 65 3.8 55 *)spring 5.3 77 7 QP4C 1 14 3.3 48 AR11 12 9
9343 10 3.4490.1 1 4.261
10 2.4 35 0.6 9 3.4 49 0.2 3 2.9 42 1.1 16 4 58 12 1.4 20 1.1 16 3.3 48 11 1.5 22 14 12 1.3191.116 3 430.7102.2321.6233.754
150
6" 150 110
6 8.2 119 5QP3C4.362M071410 94.159 7QP4C0.8123.551AR11129
10 3.3 48 0.2 3 3.8 55 *)spring 3.2460.8124.362 10 4.667
*)spring 4.9 71
11 2.1 30 12 1.9280.8123.652 12 1.6 23 0.9 13 3.1 45 0.5 7 2.6 38 1.5 22 3.9 57 14
200
8" 300 220
10 6.5 94 *)spring 572 4.464
*)spring 5.6 81 5 QP4C 4.3 62 M07 26 19
11 4.2 61 7 QP5C 0.8 12 3.5 51 M10 27 20 12 3.3 48 0.2 3 3.8 55 *)spring 3.2460.8124.668 10 AR11 24 18
13 2.1 30 12 3.8 55 *)spring 4.5 65
16 1.6 23 0.9 13 3.1 45 0.5 7 2.6 38 1.3 19 3.8 55 14 1.6 23 1 15 3.2 46
250
10" 500 370
12 5.5 80 *)spring 4.6 67 4 58 *)spring 5.5 80 7 QP5C 0.1 1 4.1 59 M10 43 32
13 3.5 51 10 M12 44 32 16 2.8 41 0.5 7 3.6 52 0 3 43 1 14 4.3 62 12 AR11 40 30 17 1.8 26 14 2.6380.5 7 3.754
300
12" 825 610
13 5.8 84 7M12 69 51
16 4.5 65 *)spring 4.2 61 3.6 52 0.3 4 5 73 10 M14 51 38
17 3 43 12 AR21 50 37 20 2.3 33 0.6 9 3.4 49 0.2 3 2.8 41 1.1 16 3.9 57 14 4.3 62 *)spring 4.6 67
350
14" 1160 860
16 6.4 93 *)spring 4.9 71 4.3 62 *)spring 5.7 83 M14 72 53 17 4.2 61 AR11 70 52 20 3.3 48 0.3 4 3.7 54 *)spring 3.1450.8124.261
25 1.7 25 0.9 13 3.1 45 0.5 7 2.6 38 1.4 20 3.6 52
400
16" 1650 1220
16 9.5 138 5.9 86 5.2 75 *)spring 6.8 99 M14 125 92
17 6 87 M15 80 59 20 4.7 68 *)spring 4.2 61 3.6 52 0.3 4 4.7 68 AR31 70 52
25 2.4 35 0.6 9 3.4 49 0.2 3 2.8 41 1.1 16 3.9 57 (AR21) 95 70
*) spring = spring torque not adequete to reach tightness according to ISO 5208 Rate D, BS 6755 Part 1 Rate D, ANSI/FCI 70.2 Class V, IEC 534-4 or MSS-SP72/1970 **) Adjust the supply pressure regulator to the pressure below. Do not exceed given value.

18 2 LW 70 en
Table 12. Series LW8M, LG8M, LW5M and LG5M,
closing torques
DN
SIZE Mc BC and BJ
SIZE BC
pc BJ
pc BJA**)
pc BJK
pc BJKA**)
pc BJV
pc BJVA**)
pc EC and EJ
SIZE EC
pc EJ
pc EJA**)
pc Q-P
actuator Spring to
close Spring to
open Manual
operator Input
torque M1
(Nm) (lbf ft) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (bar) (psi) (Nm) (lbf ft)
80
3" 45 33
62.536 5 QP2C 0.6 9 3.6 52 AR11 4 3 8 2.1 30 0.7 10 3.3 48 0.3 4 2.8 41 1.1 16 4 58 7 3.4 49 0.1 1 4.2 61 QP3C 1.1 16 3.2 46 M07 4 3
10 1.6 23 1.1 16 2.8 41 0.7 10 2.2 32 1.6 23 3.4 49 10
100
4" 75 55
64.159 5 QP2C 4.3 62 AR11 6 4 8 3.4 49 0.2 3 3.8 55 *)spring 3.3 48 0.6 9 4.6 68 7 QP3C 0.8 12 3.5 51 M07 7 5
92.130 10 2.3330.7103.754
10 1.9 28 0.9 13 3.1 45 0.5 7 2.6 38 1.4 20 3.7 54 12 11 1.1 16 14
125
5" 110 80
6687 5 QP3C0.343.957 M07 10 7 8572
*)spring 4.5 65 3.8 55 *)spring 5.3 77 7 QP4C 1 14 3.3 48 AR11 9 7
9343 10 3.4490.1 1 4.261
10 2.4 35 0.6 9 3.4 49 0.2 3 2.9 42 1.1 16 4 58 12 1.4 20 1.1 16 3.3 48 11 1.5 22 14 12 1.3 19 1.1 16 3 43 0.7 10 2.2 32 1.6 23 3.7 54
150
6" 230 170
10 5 72 *)spring 4.4 64 3.8 55 0.1 1 5 73 5 QP4C 0.3 4 3.9 57 M07 20 15
11 3.2 46 7 QPC5 1 14 3.3 48 M10 21 15 12 2.5 36 0.5 7 3.5 51 0.1 1 2.9 42 1.1 16 4.3 62 10 AR11 20 15 13 1.6 23 12 2.9420.3 4 4.159 16 1.3 19 0.9 13 3 43 0.6 9 2.3 33 1.5 22 3.7 54 14
200
8" 460 340
11 6.4 93 5 QPC50.343.957 M10 4029 12 5 72 *)spring 4.4 64 3.8 55 0.1 1 5.3 77 7 M12 38 28 13 3.2 46 10 M14 28 21 16 2.5 36 0.5 7 3.5 51 0.1 1 2.9 42 1 14 4.2 61 12 5.9 86 *)spring 5.5 80 AR11 37 27
17 1.7 25 14 2.4350.6 9 3.652 20 1.4 20 1 14 2.9 42 0.6 9 2.3 33 1.5 22 3.5 51
250
10" 800 590
13 5.6 81 7M14 49 36 16 4.4 64 *)spring 4.2 61 3.6 52 0.4 6 4.9 71 10 AR21 50 37
17 2.9 42 12 20 2.3 33 0.7 10 3.3 48 0.3 4 2.8 41 1.2 17 3.8 55 14 4.2 61 *)spring 4.5 65
300
12" 1250 920
17 4.6 67 1 M15 61 45 20 3.6520.2 3 3.855
*)spring 3.2 46 0.7 10 4.3 62 M16 44 32
25 1.8 26 0.8 12 3.2 46 0.4 6 2.6 38 1.3 19 3.7 54 AR21 75 55 32 1 15
350
14" 1750 1290
17 6.4 93 M15 85 63 20 5 72 *)spring 4.3 62 3.7 54 0.2 3 4.8 70 M16 62 46
25 2.6 38 0.6 9 3.4 49 0.2 3 2.9 42 1.1 16 3.9 57 AR31 75 55 32 1.3 19 1 14 2.9 42 0.6 9 2.3 33 1.5 22 3.6 52
400
16" 2500 1840
25 3.6520.2 3 3.855
*)spring 3.2 46 0.7 10 4.3 62 M16 94 69
32 1.8 26 0.8 12 3.2 46 0.4 6 2.5 36 1.3 19 3.8 55 M25 91 67 40 0.9 13 AR31/41 110 80
*) spring = spring torque not adequete to reach tightness according to ISO 5208 Rate D, BS 6755 Part 1 Rate D, ANSI/FCI 70.2 Class V, IEC 534-4 or MSS-SP72/1970 **) Adjust the supply pressure regulator to the pressure below. Do not exceed given value.

2 LW 70 en 19
9 EXPLODED VIEW AND PARTS LIST
Spare part category 1: Recommended soft parts, always needed for the repair. Delivered as a set.
Spare part category 2: Parts for replacing of the seat
Spare part category 3: Parts for replacing of the closing element
Spares for the full overhaul: All parts from the categories 1, 2 and 3
10 18 16 1
27
15
29
20
22
942 24 25
44
13
11
14
3
14
12
4
19
2
26
Item Qty Description Spare part category
11Body
2 1 Clamp ring
3 1 Disc 3
4 1 Seat ring 2
91Gland
10 1 Blind flange
11 1 Drive shaft 3
12 1 Shaft 3
13 1 Key 3
14 3 Pin 3
15 1 Bearing 3
16 1 Bearing 3
18 1 Gasket 1
19 1 Body seal 1
20 1 set Gland packing 1
22 1 Anti-extrusion ring
24 2 Stud
25 2 Hexagon nut
26 Hexagon screw
27 Hexagon socket screw
29 1 Identification plate
42 2 Retaining plate
44 2 Disc spring set

20 2 LW 70 en
10 DIMENSIONS AND WEIGHTS
LW6LB, LW7LB, key connection
LW8MB, LW5MB key connection
*) DN 400 has a reduced bore and uses the same disc as DN 350
KC
E
OM
R
DN 350 - 400
PN DN
øB
A1 A
S
VU
DN 80 - 125
S
VU
T
DN 150 - 400
DN Dimensions, mm U
Thread V Thread Dimensions, mm Weight kg
A1 LW6L
A (K1) LW7L A (K2) BCEKST ORMNP
80 18 46 49 128 80 168 248 70 - M10 M8 15 105 4.76 25 17.0 4
100 20 52 56 158 100 182 272 90 - M12 M8 20 125 4.76 35 22.2 6
125 22 56 64 190 135 205 295 90 - M12 M8 20 125 4.76 35 22.2 9
150 23 56 70 212 150 227 317 110 32 M12 M8 20 125 4.76 35 22.2 15
200 24 60 71 268 160 257 347 110 32 M12 M10 25 135 6.35 46 27.8 20
250 29 68 76 320 210 290 400 130 32 M12 M10 30 160 6.35 51 32.9 30
300 32 78 83 378 275 320 430 130 32 M12 M10 35 160 9.52 58 39.1 45
350 36 92 92 438 290 355 475 160 40 M16 M10 40 188 9.52 68 44.2 70
400 44 102 102 485 320 405 525 160 40 M16 M14 45 200 12.7 80 50.4 95
DN 250 - 400
KC
E
M
R
O
PN DN A1 A
øB
SU
V
DN 80 - 125
SU
V
DN 150 - 400 T
DN Dimensions, mm U
Thread V Thread Dimensions, mm Weight kg
A1 LW8M
A (K3) LW5M A (API) BCEKST ORMNP
80 18 64 48 128 80 168 248 70 - M10 M8 15 105 4.76 25 17.0 4
100 20 64 54 158 100 182 272 90 - M12 M8 20 125 4.76 35 22.2 6
125 20 70 56 158 100 182 272 90 - M12 M8 20 125 4.76 35 22.2 6
150 27 76 59 218 145 232 322 110 32 M12 M10 25 135 6.35 46 27.8 20
200 34 89 73 276 205 274 384 130 32 M12 M10 35 165 9.52 58 39.1 38
250 41 114 83 335 260 320 440 160 40 M16 M14 45 200 12.7 80 50.4 60
300 46 114 92 395 300 360 500 160 55 M20 M14 50 230 12.7 90 55.5 85
350 57 127 117 450 330 400 540 160 55 M20 M14 55 230 12.7 90 60.6 105
400* 66 140 133 505 370 440 580 160 55 M20 M14 55 230 12.7 90 60.6 125