Metso AS series User manual

Control Valves
Angle Steam Conditioning,
Combination Type
Series AS
with Desuperheater for Globe type,
Series GS
Installation, Maintenance and
Operating Instructions
4 GV 76 en • 6/2016

24 GV 76 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 construction ................................................3
1.3 Valve markings .......................................................3
1.4 Technical specifications ......................................3
1.5 Valve seat leakage class .....................................3
1.6 Recycling and disposal ........................................3
1.7 Safety precautions ................................................4
2 TRANSPORTATION, RECEPTION AND
STORAGE...............................................................4
3 VALVE INSTALLATION ........................................4
3.1 General ......................................................................4
3.2 Installation into the pipeline .............................4
3.3 Control valve assembly .......................................5
3.4 Valve insulation......................................................5
4 MAINTENANCE .....................................................5
4.1 General ......................................................................5
4.2 Gland packing adjustment.................................5
4.3 Replacing the gland packing ............................6
4.4 Replacing the trim and body reassembly.....6
4.5 Pilot Plug...................................................................7
4.6 Spray Nozzle............................................................7
4.7 ‘GS’ Desuperheater ..............................................8
5 TESTING THE VALVE ............................................9
6 REMOVAL & MOUNTING THE ACTUATOR ........10
7 TOOLS .................................................................12
8 ORDERING SPARE PARTS...................................12
9 EXPLODED VIEW AND PARTS LIST....................13
10 DIMENSIONS AND WEIGHTS ............................15
10.1 Actuators VD, VC................................................. 15
11 INSTALLATION GUIDELINES..............................18
11.1 Pipeline cleaning ................................................ 18
11.2 Installation and orientation of the valve.... 18
11.3 Hydrostatic testing and Line flushing......... 18
11.4 Piping upstream ................................................. 18
11.5 Downstream piping........................................... 19
11.6 Spray water pipe................................................. 20
11.7 Drains...................................................................... 20
11.8 Pre-Heating........................................................... 21
11.9 Temperature sensor ......................................... 21
12 TYPE CODE..........................................................22

4 GV 76 en 3
1 GENERAL
1.1 Scope of the manual
This manual provides essential information on series AS:
Angle Steam Conditioning, Combination type valve
installed sliding stem valves. Also, this manual explaining
the GS: Desuperheater for Globe type.
Actuators and positioners are only discussed briefly. Refer
to the individual manuals for further information on their
installation, operation and maintenance.
1.2 Valve construction
Series AS, Angle Steam Conditioning, Combination type
valves are flanged (weld end available) single seated sliding
stem control valves.
The valve seat ring and cage and plug with stem is a mod-
ule accessible through the bonnet opening (top entry) of
the body.
Our standard design provides a cage guide with a piston
type plug with a quick change seat ring. The two split cages
and inserted plug seal ring makes strong support to ensure
valve alignment.
This series is available with series of reduced Cv trims and
the standard seat tightness is class III~IV, optional trims can
meet to class V, ANSI/FCI 70-2.
The detailed structure is revealed by the type code shown
on the valve identification plate. The type code is explained
in Section 11.
Fig. 1 Construction of the Neles Angle Steam Conditioning
Valve, Series AS
1.3 Valve markings
The body markings are: manufacturer's trademark, nominal
size, pressure rating and material of the body. The valve has
an identification plate attached to it, see Fig. 2.
Fig. 2 Identification (name) plate example
Markings on the identification plate:
1. Type designation (Valve code)
2. Size, Rating
3. Cv
4. Body material
5. Plug, Stem material
6. Seat material
7. Temp. min./max.
8. Maximum (shut-off) pressure
9. Valve manufacturing date
10. Tag No.
11. Serial No.
1.4 Technical specifications
Face-to-face length: customized dimensions depending on
the customer spec.
Body rating: Class 150 to Class 900
Max. pressure differential:
acc. to pressure class
Temperature range: amb. to +593 °C (depending on the
body materials and bonnet type)
Flow direction: indicated by an arrow on the body
(normally flow to close)
Actuator mounting: threaded bonnet with yoke nut or
bolted yoke
Stem connection: clamp with bolts/nuts
Dimensions: see Section 10
Weights: see Section 10
Note that the max. shut-off pressure is based on the mechan-
ical maximum differential pressure at ambient temperature.
You must always observe the fluid temperature when decid-
ing on applicable pressure values. When selecting a valve
you must also check the noise level, cavitation intensity, flow
velocity, actuator load factor, etc. using Nelprof.
1.5 Valve seat leakage classification
The valve follows the seat leakage classifications of ANSI/
FCI 70-2 requirement.
1.6 Recycling and disposal
Most valve parts can be recycled if sorted according to
material. Most parts have a material marking. A material list
is supplied 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 for a fee.
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 the valve is
used.
If you are uncertain about use of the valve or its suitability
for your intended purpose, please contact Metso.
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44 GV 76 en
1.7 Safety precautions 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.
Fig. 3 Lifting the valve
Do not remove the flow port protectors until immediately
before installation of the valve into the pipeline.
The valve is delivered in the closed position. A valve
equipped with a spring-return actuator is delivered in the
position determined by the spring.
3 VALVE INSTALLATION
3.1 General
Remove the flow port protectors and check that the valve is
clean inside.
3.2 Installation into the pipeline
3.2.1 Pipeline cleaning
Make sure no foreign particles, such as sand or pieces of
welding electrode, are in the pipeline, they may damage
the sealing surfaces.
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 pipe-
line while the valve is pressurised!
Dismantling or removing a pressurised 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 yourself
and the environment from any harmful or poisonous sub-
stances. 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 plug movement!
Keep fingers, 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 plug functions as a cutting device. Close and detach
the actuator pressure supply pipeline for valve mainte-
nance. Failure to do this may result in damage or personal
injury.
CAUTION:
Protect yourself from noise!
The valve may produce noise in the pipeline. The noise
level depends on the application. It can be measured or
calculated using the Metso Nelprof software. Observe the
relevant working environment regulations in terms of
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 control valve assem-
bly, take its weight into account!
Never lift the valve or control valve assembly by the positi-
oner, the 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 :
*. Only acceptable case-3, when lift and move the valves;
1)up to outlet 6"- 300# body with VD (Diaphragm type)
actuators
2) up to outlet 10"- 300# body with VC (Cylinder type)
actuators
In the above two cases the lifting is limited to max. height
of 1.0 m and max. moving distance of 70 m.
CAUTION:
When handling the valve or the control valve assem-
bly, take its weight into account!
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Correct ( 1 2 ) Wrong ( 3 )
Steel
wire robe
Steel robe

4 GV 76 en 5
3.2.2 Installation valve
The valve has an arrow indicating the flow direction. Install
the valve in the pipeline so that the flow direction of the
valve corresponds to the flow direction marked on the pipe.
The mounting orientation of the valve should be vertical
position as it shown on Fig.4.
Choose flange gaskets according to the operating conditions.
Fig. 4 Installing the control valve into pipeline using supports
Do not attempt to correct a pipeline misalignment by
means of flange bolting.
Loads on the valve body from pipeline vibrations can be
reduced by supporting the pipeline properly. Reduced
vibration also increases the lifetime of the positioner.
Where necessary, you can support the valve by the body, using
regular pipe clamps and supports. Do not fasten supports to
the valve or flange bolting or to the actuator, see Fig. 4.
3.2.3 Hydrostatic testing and Line flushing
When the line is hydrostatic test and flushing, the control valve
should not used as an isolating valve. Make sure the control
valve always be opened position before start this process.
Otherwise valve and trim damage or failure of the seals could
result.
Flushing and hydrostatic test kit can be purchased from Metso.
3.3 Control valve assembly
Check all joints, piping and cables.
Check that the actuator stop screws, positioner and limit
switches are calibrated. Refer to their installation, mainte-
nance and operating manuals.
3.4 Valve insulation
If necessary, the valve may be insulated. Insulation must not
continue above the upper level of the valve body, see Fig. 5.
Fig. 5 Insulation of the valve
4 MAINTENANCE
4.1 General
The Neles series AS, Angle Steam Conditioning valve
require regular maintenance. Check the gland packing for
leakage. This section outlines the maintenance that can be
carried out by the user.
The numbers in parentheses refer to the parts lists and the
exploded views of the valve in Section 9.
4.2 Gland packing adjustment
In the event of a packing leakage tighten the gland nuts
(18) in ¼ turn steps each until the leakage is stopped. Do
not tighten more than necessary.
CAUTION:
Flushing trim kit should be installed in the valve (espe-
cially 'Tendril & Omega trim' application) to protect the
original trim and the flow passages while the valve
installation and line flushing. Unless this caution could
result in clogging trim, low flow rates, unstable control,
valve leakage and exessive noise and other trouble.
CAUTION:
Observe the safety precautions listed in Section 1.7
before starting work!
CAUTION:
When handling the valve or the control valve assem-
bly, take its weight into account!
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 nature
of the medium when you send the valve.
NOTE:
Always use original spare parts to make sure the valve
functions as intended.
Insulation limit

64 GV 76 en
4.3 Replacing the gland packing
Fig. 6 Gland packing
Make sure the valve is not pressurised.
Remove the actuator from the valve stem according
to the instructions given in the actuator manual.
Loosen and remove the hexagon nuts (18).
Remove the gland flange (9b), and gland (9a) up to
the valve stem.
Remove the old packing rings (69) using a pointed
tool, avoid damaging the seal surfaces and valve stem.
Clean the packing ring counterbore.
Mount the new packing rings one by one into the
packing gland box using the gland as a tool and
mount the gland with hand-tightened nuts.
Fasten the gland with the hexagon nuts (18) and
tighten them.
Check leakage when the valve is pressurised.
Fig. 7 Tightening sequence of the bonnet nuts
4.4 Replacing the trim and body
reassembly
Make sure the valve is not pressurised.
Remove the actuator from the valve stem according
to the instructions given in the actuator manual and
next Section 6.
Remove the hexagon nuts (18) slightly.
Remove the hexagon nuts (17).
Remove the bonnet (8)
Remove the cage guide (16), cage (15) and the seal
ring (64). Avoid from damaging the seal ring
between the cage and cage guide.
Remove the body gasket (65 & 65a), one piece of
seat ring (7) and diffuser (81), seat gasket (63).
Remove the hexagon nuts (18), gland flange (9b)
and gland (9a).
Remove the old packing rings (69).
CAUTION:
Do not dismantle the valve or remove it from the pipe-
line while the valve is pressurised!
NOTE:
The trim set consists of the seat ring, valve plug and stem,
retainer and gaskets(for seat ring and bonnet).
Standard construction
Low Emission with
Live Load Spring
Table 1 Required torques for bonnet nuts
Valve Size Rating
(ANSI)
Bonnet Stud Bolts Required Torques
(± 5 % allowable)
mm in Size Q`ty
Carbon Steel
Bolts St. Steel Bolts
Nm lbf ft Nm lbf ft
50 2
150-300 1/2"-13UNC 8 101 74 80 59
600 1/2"-13UNC 8 158 116 123 90
900 7/8"-9UNC 8 199 146 199 146
1500 7/8"-9UNC 8 286 210
80 3
150-300 3/4"-10UNC 8 176 129
136 100
600 3/4"-10UNC 8 211 155
900 1-1/8"-8UNC 8 558 409
1500 1-1/8"-8UNC 8 792 581
100 4
150-300 7/8"-9UNC 8 222 163
160 118
600 7/8"-9UNC 8 327 240
900 1-1/4"-8UNC 8 867 633
1500 1-1/4"-8UNC 8 1339 982
150 6
150-300 1"-8UNC 8 316 232 291 214
600 1"-8UNC 12 327 240
900 1-1/2"-8UNC 12 1192 874 942 691
1500 1-1/2"-8UNC 12 1456 1068
200 8
150-300 1-1/4"-8UNC 8 478 351 478 351
600 1-1/4"-8UNC 12 653 479 653 479
900 1-5/8"-8UNC 12 1676 1229 1140 836
1500 1-5/8"-8UNC 12 1870 1372
250 10
150-300 1-1/4"-8UNC 12 486 356 486 356
600 1-1/4"-8UNC 16 909 667 716 525
900 1-3/4"-8UNC 12 2059 1510
300 12
150-300 1-1/2"-8UNC 12 729 535
729 535600 1-1/2"-8UNC 12 1317 966
900 1-1/2"-8UNC 16 1408 1032
350 14
150-300 1-1/2"-8UNC 12 875 642
875 642600 1-1/2"-8UNC 12 1581 1160
900 1-1/2"-8UNC 16 1689 1238
400 16 150-300 1-1/2"-8UNC 12 1529 1121 980 719
600 1-1/2"-8UNC 16 1426 1046
500 20 150-300 1-3/4"-8UNC 20 1816 1332 1725 1265
600 1-3/4"-8UNC 24 2107 1545 2001 1468
600 24 150-300 1-3/4"-8UNC 20 1923 1410 2491 1827
600 1-3/4"-8UNC 24 2216 1625 2105 1544
NOTE:
The standard is ‘quick change seat type’, other design has
a ‘weld seat type’ according to weld seat ring on the body
side.
NOTE:
The standard is one piece with seat ring (7) and the
diffuser (81) by welded, other design has a separated type
according to weld diffuser on the body side.
NOTE:
If the valve have excess leakage, the plug and seating
surface need lapping and cleaning.
NOTE:
‘Omega’ Disk Stack Cage Cleaning
The welded ‘Omega’ disk stack cage is not available
disassembling, make sure the ultrasonic cleaning in the
frequency range of 250 ~ 400 kHz and Min. duration
60 min.

4 GV 76 en 7
Clean the body gasket surface.
Insert a new seat gasket (63) and the seat ring (7) &
diffuser (81) kit into the body.
Install the cage (15), seal ring (64), cage guide (16)
and plug stem assembly (3, 5, 6) very carefully.
Insert the body gasket (65 & 65a).
Mount the bonnet on the body carefully maintaining
alignment with the plug and the stem and with the
retainer (or cage) in the closed position, so that the
bonnet position in relation to the body is the same
as the original position.
Insert the hexagon nuts (17) into stud (13) and
slightly fasten the nuts.
Insert the packing rings (69) according to above 4.3
Tighten hexagon nuts (17) until plug and seat con-
tact is obtained with proper bolt torque.
Fig. 8 Omega quick change, Standard balanced trim
Fig. 9 Pilot Omega-balanced trim
4.5 Pilot Plug
Disassembly & Assembly
Mount the plug and stem assembly on the chuck to
setting.
Remove the pilot wire (76).
Remove the pilot bolts (75).
Remove the pilot cover (74).
Remove the pilot plug (73) and pilot stem (72) from
pilot main plug (71).
Remove the pilot spring (77) carefully.
Remove the pilot plug (73) and the pilot seat as well
as the surface inside of the pilot main plug (71). If
there is damage, scratches or grooves, it should be
replaced or repaired.
Insert the cleaned pilot spring (77) into the upper
side of main plug.
Install the pilot plug (73) & pilot stem (72) on the
spring (77).
Install the pilot cover (74) and fasten the pilot bolts
(75) keep in balance.
Install wire (76) for connecting the all pilot bolts due
to prevent loose on operation.
4.6 Spray Nozzle
Disassembly & Assembly
Remove the (Spray to Spray) hexagon nuts (87a).
Remove the spray cover (84).
Remove the spray gasket (86).
CAUTION:
Do not reuse the spiral wound gaskets (63 & 65 & 65a),
this is need to be replace each time the valve is disas-
sembled.
CAUTION:
Do not strongly tighten stud nuts at this time
CAUTION:
The all related parts (seat ring, retainer, cage, plug &
stem, bonnet) must be properly aligned in the body.
CAUTION:
Make sure to balance when loose the pilot bolts, and
be careful the spring tension to bounced off the pilot
plug and stem.

84 GV 76 en
Remove the old packing rings (85) using a pointed
tool, avoid damaging the seal surfaces and spray
retainer.
Remove the spray retainer (88) sub-assembly using
by the one of stud (87) carefully.
Grind welded point between the spray nozzle sub-
assembly (detail ‘a’, 89a~d) and the spray retainer (88).
Remove the spray nozzle sub-assembly (detail ‘a’,
89a~d) from the spray retainer (88) and replace them
by new one.
Re-weld one point the spray nozzle sub-assembly
(detail ‘a’, 89a~d) and the spray retainer (88).
Clean the body gasket surface.
Install the new or repaired spray retainer (88) sub-
assembly using by the one of stud (87) carefully.
Mount the new packing rings (85) one by one into
the packing gland box using the gland as a tool.
Insert a new spray gasket (86) into the spray retainer
(88).
Install the spray cover (84).
Tighten hexagon nuts (87a).
Fig. 10 Integral Spring loaded injection type spray nozzle
4.7 ‘GS’ Desuperheater
Disassembly & Assembly
Remove the (housing) hexagon nuts (96a).
Remove the housing bonnet (95) sub-assembly care-
fully.
Remove the flange gasket (97).
Grind welded point between the spray nozzle sub-
assembly (detail ‘a’, 89a~d) and the spray nozzle (89).
Remove the spray nozzle sub-assembly (detail ‘a’,
89a~d) from the spray nozzle (89) and replace them
by new one.
Fig. 11 Globe PCV + Desuperheater type
CAUTION:
Do not reuse the spray nozzle sub-assembly (detail ‘a’,
89a~d), this is need to be replace each time the valve is
disassembled.
CAUTION:
Do not reuse the spiral wound gasket (86), this is need
to be replace each time the valve is disassembled.

4 GV 76 en 9
Fig. 12 Different trim designs
Re-weld one point the spray nozzle sub-assembly
(detail ‘a’, 89a~d) and the spray nozzle (89).
Clean the flange gasket surface.
Insert the spray gasket (86).
Install the new or repaired spray nozzle (89) sub-
assembly carefully.
Tighten hexagon nuts (96a).
5 TESTING THE VALVE
We recommend that the valve body is pressure-tested after
the valve has been assembled.
The pressure test should be carried out in accordance with
an applicable standard for the pressure rating. The valve
must be in the open position during the test.
Omega quick change, Standard balanced trim Omega quick change, Pilot balanced trim
Tendril multi-stage Tendril multi-stage Pilot balanced trim
CAUTION:
Do not reuse the spray nozzle sub-assembly (detail ‘a’,
89a~d), this is need to be replace each time the valve is
disassembled.
CAUTION:
Do not reuse the spiral wound gasket (86), this is need
to be replace each time the valve is disassembled.
CAUTION:
Make sure same direction to be cooperate the lines
with the flange of desuperheater housing (80) and
housing bonnet (95) for avoid miss arrangement of
spray nozzle direction (see Detail ‘b’ of fig. 11).
CAUTION:
Pressure testing should be carried out using equip-
ment conforming to the correct pressure class!

10 4 GV 76 en
6 REMOVAL & MOUNTING THE
ACTUATOR
The actuator is attached to the valve according to the manual
for actuator with body assembly and plug stem adjustment.
Several types of Metso actuators can be used with suitable
clamps. Refer to the model VD spring-diaphragm and VC
double acting cylinder actuator manuals for further informa-
tion on their installation, maintenance and operation.
A. Actuator removal for VD Reverse<air to open, stem
retract> actuator (Fig. 13)
Lift up to the valve plug 100% from the seat ring,
using by specified air pressure.
Loosen the stem lock nut (5**) and socket head
screws (1a**) and hexagon nuts (1b**).
Remove the clamp (1**).
Shut off and disconnect air supply line.
Support actuator with the suitable lifting device.
Remove the yoke nut (3**).
Remove the actuator from the valve body assembly.
B. Actuator replacement (mounting) for VD Reverse<air
to open, stem retract> actuator (Fig. 13)
Mount the new or repaired actuator on top of the
bonnet, using a suitable lifting device.
Insert the yoke nut and tightly fasten the yoke by
turning the yoke nut clockwise using tightening
tools.
Connect air line and accessories.
Lift the top stem (18), using by specified air pressure.
Adjustment stem length after clamping the
clamp (1**) according to rated travel(stroke) as
‘open’ and ‘close’ position as per pressurizing and
depressurizing the lower diaphragm chamber.
Tighten stem socket head screws (1a**) and hexa-
gon nuts (1b**) with stem lock nut (5**).
C. Actuator removal for VD Direct<air to close, stem
extend> actuator (Fig. 13)
Shut off and disconnect the air supply lines and
accessories.
Loosen stem lock nut (5**) and stem socket head
screws (1a**) and hexagon nuts (1b**).
Remove the clamp (1**).
Support actuator with the suitable lifting device.
Remove the yoke nut (3**).
Remove the actuator from the valve body assembly.
Fig. 13 VD Actuator
CAUTION:
Beware of the plug movement!
Do not use air pressure higher than what specified on the
identification plate.
Direct Action actuator
(Air to Close, stem extend)
Reverse Action actuator
(Air to Open, stem retract)
VD Actuator part
1. YOKE 10. LOWER CASE 18 TOP STEM 20. UPPER CASE
21. LIFTING EYE NUT 22. WASHER 23. HEXAGON SCREW 24. HEXAGON SCREW
25. HEXAGON NUT 30. IDENTIFICATION PLATE 32. INDICATOR 32a. ROUND HEAD SCRREW
34. VENT CAP 99. AIR SUPPLY PORT
V-A (Valve-Actuator) Mounting Part (**)
1** CLAMP 1a**SOCKET HEAD SCREW
1b** HEXAGON NUT 3**YOKE NUT (see above VD g.)
5** STEM LOCK NUT 6** LOCK WASHER

4 GV 76 en 11
D. Actuator replacement (mounting) for VD Direct<air
to close, stem extend> actuator (Fig. 13)
Mount the new or repaired actuator on top of the
bonnet, using a suitable lifting device to setting.
Insert the yoke nut and tightly fasten the yoke by
turning the yoke nut clockwise using tightening
tools.
Connect air line and accessories.
Down the top stem (18), using by specified air pres-
sure.
Adjust stem length after clamping the clamp (1**)
according to rated travel (stroke) as ‘open’ and ‘close’
position as per pressurizing and depressurizing the
upper diaphragm chamber.
Tighten stem socket head screws (1a**) and hexa-
gon nuts (1b**) with stem lock nut (5**).
E. Actuator removal for VC actuator (Fig. 14)
Shut off and disconnect the air supply lines and
accessories.
Loosen the plug stem locknut and the 4 socket head
screws (26a) on the clamp (26).
Remove the clamp (26).
Support the actuator with the suitable lifting device.
Remove the hexagon screws from the valve bonnet.
Remove the actuator from the valve body assembly.
F. Actuator replacement (mounting)for VC actuator
(Fig. 14)
Mount the new or repaired actuator on top of the
valve bonnet, using a suitable lifting device.
Insert the hexagon screws and tightly fasten the
yoke by turning the hexagon screws clockwise using
tightening tools.
Connect air line with actuator.
Down the top stem (18), by using specified air
pressure.
Adjust stem length after clamping the clamp (26)
according to rated travel (stroke) as ‘open’ and ‘close’
position as per pressurizing and depressurizing the
both side of cylinder chambers.
Tighten the 4 socket head screws (26a) on the clamp
(26) and the lower stem locknut.
Fig. 14 VC Actuator
CAUTION:
Avoid to turn the valve plug and stem when plug is on
seat ring to prevent the seating line from being damaged.
VC, without volume chamber
VC, with volume chamber
VC Actuator part
1. YOKE 1A. HEXAGON SCREW 1B. WASHER 18 TOP STEM
21. LIFTING EYE NUT 30. IDENTIFICATION PLATE 30A. RIVET 32. INDICATOR
32A. ROUND HEAD SCRREW 60. TOP COVER 61. BOTTOM COVER 66A. TIE ROD
66C. HEXAGON SCREW 66D. WASHER
V-A (Valve-Actuator) Mounting Part (**)
1b** HEXAGON NUT 5** STEM LOCK NUT
6** LOCK WASHER 26** CLAMP
26a**SOCKET HEAD SCREW 26b** INDICATOR ARROW

12 4 GV 76 en
7TOOLS
Removal of the actuator
L- wrench set(mm)
hex socket wrench set
chisel and hammer(10 pound)
+,- drivers
8 ORDERING SPARE PARTS
When ordering spare parts, always include the following
information:
type code, sales order number, serial number
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.
NOTE:
Always use original spare parts to make sure that the valve
functions as intended.

4 GV 76 en 13
9 EXPLODED VIEW AND PARTS LIST
Series AS
9b
18
14
81
16
3
65
63
1
6
8
17
13
64
7
25
65a
21
69
67
69
9a
82
83
84
87
87a
80
83
86
90
91
92
91
88
85
89c
89a
89e
89b
89d
89c
89d
89b
89e
89a
5
3**
PILOT PLUG
Live Load Application
Item Description Recommended spare part
1 BODY
2* PLUG SET
3* PLUG
5* STEM
6* PLUG PIN
3** YOKE NUT
7 SEAT RING
8 BONNET
9a GLAND
9b GLAND FLANGE
12 DISK SPRING ASSY
13 STUD
14 STUD
16 CAGE GUIDE
17 HEXAGON NUT
18 HEXAGON NUT
19 IDENTIFICATION PLATE
19a RIVET
21 LANTERN RING
25 DISK STACK
63 SEAT GASKET X
64 SEAL RING X
65 BODY GASKET X
65a BODY GASKET X
67 PACKING SPACER
69 PACKING RING X
71 PILOT MAIN PLUG
Item Description Recommended spare part
72 PILOT STEM
73 PILOT PLUG
74 PILOT COVER
75 PILOT BOLT
76 PILOT WIRE
77 PILOT SRPING
80 DESUPERHEATER HOUSING
81 DIFFUSER
82 LINER
83 SPRAY BODY
84 SPRAY COVER
85 PACKING RING X
86 SPRAY GASKET X
87 STUD
87a HEXAGON NUT
88 SPRAY RETAINER
89a NOZZLE PLUG
89b NOZZLE SEAT
89c NOZZLE SPRING
89d LOCK NUT
89e SPRING SEAT
90 PIPE SOCKET
91 SPRAY PIPE
92 SPRAY TEE
*) Delivered as a set
**) V-A Mounting Parts

14 4 GV 76 en
Series GS
96a
96
95
97
89
89d
89c
89a
89b
80
Item Description Recommended spare part
80 DESUPERHEATER HOUSING
89 SPRAY NOZZLE
89a NOZZLE PLUG
89b NOZZLE SEAT
89c NOZZLE SPRING
89d LOCK NUT
95 HOUSING BONNET
96 STUD
96a HEXAGON NUT
97 FLANGE GASKET X

4 GV 76 en 15
10 DIMENSIONS AND WEIGHTS
10.1 Actuators VD, VC
(UNIT: mm)
Without handwheel
Size A2 Bd Br D Ed Er C2 Weight (kg)
#25 255 348 373 NPT 1/4 149 124 225 12
#29 295 391 416 NPT 1/4 174 129 251 18
#37 375 464 489 NPT 1/4 184 128 284 28
#48 486 652 677 NPT 1/4 250 165 381 86
#55 566 695 720 NPT 1/4 260 156 381 112
NOTE
1. "Br" refers to reverse acting actuator, VDR
2. "Bd" refers to direct acting actuator, VDD
(UNIT: mm)
With handwheel
Size A2 Bd Br D A3 B hd B hr C2 Weight (kg)
#25 255 348 373 NPT 1/4 312 110 170 225 22
#29 295 391 416 NPT 1/4 312 122 182 251 28
#37 375 464 489 NPT 1/4 342 141 201 284 43
#48 486 652 677 NPT 1/4 464 144 244 381 119
#55 566 695 720 NPT 1/4 464 144 244 381 145
NOTE
1. "Br" refers to reverse acting actuator, VDR
2. "Bd" refers to direct acting actuator, VDD
VDD Direct Action VDR Reverse Action
Bd
A2
Br
A2
C2
C2
Er
Ed
D
FRONT RIGHT FRONT RIGHT
VDD Direct Action VDR Reverse Action
Bhr
A2 A3
Br
Bhd
A2 A3
Bd
D
C2 C2
FRONT FRONT RIGHTRIGHT

16 4 GV 76 en
Size # 30 (UNIT: mm)
Stroke A B1 ØC D1 E F
Weight (kg)
B2 D2 A B
40 145
640 Ø370 185 420 PT 1/2 92 115
760 305
50 145
650 Ø370 195 420 PT 1/2 94 118
790 335
60 145 660 Ø370 205 420 PT 1/2 97 121
820 365
70 145
670 Ø370 215 420 PT 1/2 100 124
850 395
80 145
680 Ø370 225 420 PT 1/2 103 127
880 425
90 145
690 Ø370 235 420 PT 1/2 106 130
910 455
100 145
700 Ø370 245 420 PT 1/2 108 133
940 485
120 145
720 Ø370 265 420 PT 1/2 114 139
1000 545
Size # 40 (UNIT: mm)
Stroke A B1 ØC D1 E F
Weight (kg)
B2 D2 A B
40 145
810 Ø460 205 560 PT 1/2 120 148
935 330
50 145
820 Ø460 215 560 PT 1/2 123 152
965 360
60 145 830 Ø460 225 560 PT 1/2 126 155
995 390
70 145
840 Ø460 235 560 PT 1/2 128 159
1025 420
80 145
850 Ø460 245 560 PT 1/2 131 162
1055 450
90 145 860 Ø460 255 560 PT 1/2 134 166
1085 480
100 145
870 Ø460 265 560 PT 1/2 137 170
1115 510
120 145
890 Ø460 285 560 PT 1/2 142 177
1175 570
140 145
910 Ø460 305 560 PT 1/2 148 184
1235 630
180 145
950 Ø460 345 560 PT 1/2 159 198
1355 750
Size # 50 (UNIT: mm)
Stroke A B1 ØC D1 E F
Weight (kg)
B2 D2 A B
40 145
810 Ø560 205 560 PT 1/2 186 234
935 330
50 145
820 Ø560 215 560 PT 1/2 189 237
965 360
60 145 830 Ø560 225 560 PT 1/2 192 242
995 390
70 145
840 Ø560 235 560 PT 1/2 195 246
1025 420
80 145
850 Ø560 245 560 PT 1/2 198 251
1055 450
90 145 860 Ø560 255 560 PT 1/2 201 256
1085 480
100 145
870 Ø560 265 560 PT 1/2 203 261
1115 510
120 145 890 Ø560 285 560 PT 1/2 209 270
1175 570
140 145
910 Ø560 305 560 PT 1/2 215 279
1235 630
180 145
950 Ø560 345 560 PT 1/2 227 298
1355 750
Size # 60 (UNIT: mm)
Stroke A B1 ØC D1 E F
Weight (kg)
B2 D2 A B
100 145
954 Ø660 264 640 PT 1/2 255 344
1199 509
120 145 974 Ø660 284 640 PT 1/2 262 355
1259 569
140 145
994 Ø660 304 640 PT 1/2 269 365
1319 629
180 145
1034 Ø660 344 640 PT 1/2 283 386
1349 749
240 145 1094 Ø660 404 640 PT 1/2 303 417
1619 929
Size # 70 (UNIT: mm)
Stroke A B1 ØC D1 E F
Weight (kg)
B2 D2 A B
100 145
955 Ø710 265 640 PT 3/4 322 438
1203 510
120 145 975 Ø710 285 640 PT 3/4 330 450
1263 570
140 145
995 Ø710 305 640 PT 3/4 338 461
1323 630
180 145
1035 Ø710 345 640 PT 3/4 354 484
1443 750
240 145 1095 Ø710 405 640 PT 3/4 377 518
1623 930
Size # 80 (UNIT: mm)
Stroke A B1 ØC D1 E F
Weight (kg)
B2 D2 A B
100 145
954 Ø820 264 640 PT 3/4 378 519
1207 509
120 145 974 Ø820 284 640 PT 3/4 386 531
1267 569
140 145
997 Ø820 304 640 PT 3/4 394 543
1327 629
180 145
1034 Ø820 344 640 PT 3/4 410 567
1447 749
240 145 1094 Ø820 404 640 PT 3/4 435 604
1627 929
280 145 1134 Ø820 444 640 PT 3/4 451 628
1747 1049

4 GV 76 en 17
Size # 30 (UNIT: mm)
Stroke A B1 ØC D1 E F G
Weight
( kg)
B2 D2 A B
40 145
930 Ø370 185 410 470 PT 1/2 134 157
1055 305
50 145
940 Ø370 195 410 470 PT 1/2 137 160
1085 335
60 145 950 Ø370 205 410 470 PT 1/2 139 163
1115 365
70 145
960 Ø370 215 410 470 PT 1/2 142 167
1145 395
80 145
970 Ø370 225 410 470 PT 1/2 144 170
1175 425
90 145 980 Ø370 235 410 470 PT 1/2 147 173
1205 455
100 145 990 Ø370 245 410 470 PT 1/2 150 176
1235 485
120 145
1010Ø370 265 410 470 PT 1/2 155 183
1295 545
Size # 40 (UNIT: mm)
Stroke A B1 ØC D1 E F G
Weight
(kg)
B2 D2 A B
40 145
1095 Ø460205 845 616 PT 1/2 180 208
1220 330
50 145
1105 Ø460215 845 616 PT 1/2 183 212
1250 360
60 145
1115 Ø460225 845 616 PT 1/2 186 215
1280 390
70 145
1125 Ø460235 845 616 PT 1/2 188 219
1310 420
80 145
1135 Ø460245 845 616 PT 1/2 191 222
1340 450
90 145
1145 Ø460255 845 616 PT 1/2 194 226
1370 480
100 145
1155 Ø460265 845 616 PT 1/2 197 230
1400 510
120 145
1175 Ø460285 845 616 PT 1/2 202 237
1460 570
140 145
1195 Ø460305 845 616 PT 1/2 208 244
1520 630
180 145
1235 Ø460345 845 616 PT 1/2 219 258
1640 750
Size # 50 (UNIT: mm)
Stroke A B1 ØC D1 EF G
Weight
(kg)
B2 D2 A B
40 145 1095Ø560 205 845 616 PT 1/2 246 294
1220 330
50 145 1105Ø560 215 845 616 PT 1/2 249 299
1250 360
60 145 1115Ø560 225 845 616 PT 1/2 252 303
1280 390
70 145 1125Ø560 235 845 616 PT 1/2 255 308
1310 420
80 145 1135Ø560 245 845 616 PT 1/2 258 313
1340 450
90 145 1145Ø560 255 845 616 PT 1/2 261 318
1370 480
100 145 1155Ø560 265 845 616 PT 1/2 263 322
1400 510
120 145 1175Ø560 285 845 616 PT 1/2 269 332
1460 570
140 145 1195Ø560 305 845 616 PT 1/2 275 341
1520 630
180 145 1235Ø560 345 845 616 PT 1/2 287 360
1640 750
Size # 60 (UNIT: mm)
Stroke A B1 ØC D1 E F D
Weight
(kg)
B2 D2 A B
100 145
1239Ø660 264 925 696 PT 1/2 315 404
1484 509
120 145 1259Ø660 284 925 696 PT 1/2 322 415
1544 569
140 145
1279Ø660 304 925 696 PT 1/2 329 425
1604 629
180 145
1319Ø660 344 925 696 PT 1/2 343 446
1724 749
240 145 1379Ø660 404 925 696 PT 1/2 363 477
1904 929
Size # 70 (UNIT: mm)
Stroke A B1 ØC D1 E F D
Weight
(kg)
B2 D2 A B
100 145
1240Ø710 265 925 696 PT 3/4 368 502
1488 510
120 145 1260Ø710 285 925 696 PT 3/4 376 514
1548 570
140 145
1280Ø710 305 925 696 PT 3/4 384 525
1608 630
180 145
1320Ø710 345 925 696 PT 3/4 400 548
1728 750
240 145 1380Ø710 405 925 696 PT 3/4 423 582
1908 930
Size # 80 (UNIT: mm)
Stroke A B1 ØC D1 E F D
Weight
(kg)
B2 D2 A B
100 145
1289Ø820 264 975 696 PT 3/4 438 579
1542 509
120 145 1309Ø820 284 975 696 PT 3/4 446 591
1602 569
140 145
1329Ø820 304 975 696 PT 3/4 454 603
1662 629
180 145
1369Ø820 344 975 696 PT 3/4 470 627
1782 749
240 145 1429Ø820 404 975 696 PT 3/4 495 664
1962 929
280 145 1469Ø820 444 975 696 PT 3/4 511 688
2082 1049

18 4 GV 76 en
11 INSTALLATION GUIDELINES
11.1 Pipeline cleaning
Make sure no foreign particles, such as sand or pieces of
welding electrode, are in the pipeline, they may damage
the sealing surfaces.
11.2 Installation and orientation of the
valve
The valve has an arrow indicating the flow direction. Install
the valve in the pipeline so that the flow direction of the
valve corresponds to the flow direction marked on the pipe.
The mounting orientation of the valve should be vertical as
it shown on Fig. 4.
Choose flange gaskets according to the operating condi-
tions. Do not attempt to correct a pipeline misalignment by
means of flange bolting. Loads on the valve body from
pipeline vibrations can be reduced by supporting the pipe-
line properly. Reduced vibration also increases the lifetime
of the positioner. Where necessary, you can support the
valve by the body, using regular pipe clamps and supports.
Do not fasten supports to the valve or flange bolting or to
the actuator, see Fig. 4.
11.3 Hydrostatic testing and Line flushing
When the line is hydrostatic test and flushing, the control
valve should not used as an isolating valve. Make sure the
control valve always be opened position before start this
process. Otherwise valve and trim damage or failure of the
seals could result. Flushing and hydrostatic test kit can be
purchased from Metso.
11.4 Piping upstream
Upstream piping just before the AS valve must be straight
and have no other components. T-piece junctions must also
be avoided.
Metso’s guideline for the straight length of upstream piping
is minimum 5 times to the nominal diameter of piping or a
minimum of 2 meters.
If multiple components are located upstream the AS valve
the distance must be increased to achieve uniform flow
profile before the AS valve.
It is necessary to keep water out of the system (see drains)
in order to avoid vibration, mechanical damages and
ensure reliable temperature measurement.
Metso´s guide value for a slope against the flow is 1:200 as
minimum. The drain must be provided at the lowest point
of piping.
CAUTION:
Flushing trim kit should be installed in the valve (espe-
cially 'Tendril & Omega trim' application) to protect the
original trim and the flow passages while the valve
installation and line flushing. Unless this caution could
result in clogging trim, low flow rates, unstable control,
valve leakage and exessive noise and other trouble.
5xDN (min 2- 5 m)
S lope min 0. 5%

4 GV 76 en 19
11.5 Downstream piping
It is necessary to have straight piping downstream of the
valve because sprayed water needs some distance to evap-
orate and for example bends will separate water from
steam and hence prevent optimum evaporation.
Metso´s guideline for straight downstream piping is about10
times the nominal diameter and a minimum of 2-5 m.
In downstream piping it is also necessary to keep water
away from piping (see drains).
Metso´s guide value for a slope with the flow is minimum
1:200.
A drain should be provided a the lowest point.
10×DN (min 2 - 5 m)
Slope min 0.5 %
10×DN (min 2 - 5 m)
Slope min 0.5 %

20 4 GV 76 en
11.6 Spray water pipe
Reliable operation of steam condition requires a proper
installation between the AS valve and the spray water con-
trol valve. Spray water piping must ensure continuous and
immediate supply of water and it should not get empty.
The piping coming from the spray water control
valve to the AS valve shall be arranged below the
level of the spray pipe.
The distance between the spray water control valve
and the spray pipe should be minimized to less than
5 meters.
11.7 Drains
Condensate or non evaporated spray water in the valve or
steam piping is very risky, it can cause erosion in piping and
the valve, it causes vibration and water hammer and it can
disturb temperature measurement causing problems in
control.
Upstream drains are necessary to protect the AS valve. The
drain connections shall be at the lowest point and nearest
to the AS valve. Slopes shall be always arranged so that
water flows towards the drain.
Metso´s guideline value for a standard drain connection
upstream is a G ½” pipe thread.