Spring Diaphragm Actuator
Series VD
Installation, Maintenance and
Operating Instructions
6 DA 70 en • 2/2018
2 6 DA 70 en
Table of Contents
1 GENERAL...............................................................3
1.1 Scope of the manual ............................................3
1.2 Structure and operation......................................3
1.3 Actuator markings.................................................3
1.4 Specifications ..........................................................3
1.5 Recycling and disposal ........................................5
1.6 Safety precautions ................................................5
2 TRANSPORTATION, RECEPTION AND
STORAGE...............................................................5
3 MOUNTING AND REMOVAL.................................5
3.1 Actuator air supply................................................5
3.2 Mounting the actuator on the valve ............5
3.3 Removing the actuator from the valve..........6
4 MAINTENANCE ...................................................7
4.1 General ......................................................................7
4.2 Replacement diaphragm for VDD,
Air to close................................................................7
4.3 Replacement diaphragm for VDR,
Air to open ............................................................... 8
4.4 Operation the handwheel ..................................8
4.5 Removal & mounting of the handwheel
bundle .................................................................... 12
4.6 Change of the spring range ............................ 13
4.7 Change of the actuator action....................... 13
4.8 Adjustment for valve stem.............................. 15
4.9 Maximum & minimum stopper ..................... 15
5 MALFUNCTIONS ................................................15
6 TOOLS .................................................................15
7 ORDERING SPARE PARTS...................................15
8 EXPLODED VIEWS AND PARTS LIST..................16
9 DIMENSIONS AND WEIGHTS ............................19
10 TYPE CODE..........................................................21
READ THESE INSTRUCTIONS FIRST!
These instructions provide information about safe handling and operation of the actuator.
If you require additional assistance, please contact the manufacturer or manufacturer's representative.
Addresses and phone numbers are printed on the back cover.
See also www.metso.com/valves for the latest documentation.
SAVE THESE INSTRUCTIONS!
Subject to change without notice.
All trademarks are property of their respective owners.
This product meets the requirements set by the Customs Union of the Republic of Belarus,
the Republic of Kazakhstan and the Russian Federation.
6 DA 70 en 3
ACT'R CODE
SUPPLY AIR FAIL TO
CO NO.
DATE SIZE
TAG NO.
RANGE
TRAVEL
Metso F low Control
MAX SUPPLY PR.
4. 2B AR (60 PS I) MAXIMUM
DIA PHR AG M C AS E P RE SS UR E
A C T U A L R E C O MM E N D E D S U P P L Y P R E S S U R E M A Y B E L O W E R D U E T O M E C H A N I C A L
L I M IT A T I O N O F V A L V E O R P N E U M A T I C A C C
E S S O R I E S . … … …… … S E E I D P L A T E
UN DER SP R ING TE NS ION AND IS E QUIP PE D W ITH
LO NGE S T HE XAG ON SC R EW WH ICH MUS T BE R E MOVED LAS T
VD
WAR NING
1 GENERAL
1.1 Scope of the manual
This manual provides essential information on Metso series
VD, Pneumatic Linear, Spring Diaphragm Actuators. Valve
body and trims are only discussed briefly. Refer to the individual manuals for further information on their installation,
operation and maintenance.
NOTE:
Selection and use of the actuator 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 actuator is
used.
If you are uncertain about use of the actuator or its suitability for your intended purpose, please contact Metso
Automation for more information.
1.2 Structure and operation
Metso series VD are Pneumatic Linear, Spring Diaphragm
actuators. Excellent accuracy and reliability is achieved
through the use of multiple springs and rolling diaphragm
in the actuator.
The use of involute rolling diaphragm permits the long
travel and excellent linearity without the need of expensive
hardware normally associated with diaphragm actuators.
The rugged one piece yoke, pressed steel diaphragm case
and special nylon reinforced diaphragm provide dependable, high thrust performance.
This series are available to provide a optional handwheel for
manual operation. The detailed structure is revealed by the
type code shown on the valve identification plate. The type
code is explained in Section 10.
1.3 Actuator markings
The actuator is provided with an identification plate, see
Fig. 2. Identification plate markings are:
1. Actuator code (model)
2. Manufacturing site, date, serial no.
3. Supply, air fail to
4. Range and travel
5. Max. supply pressure
Also, provided with an warning plate, see Fig. 3
Fig. 2 Identification plate
Fig. 3 Warning plate
1.4 Specifications
Table 1. VD Actuators temperature ranges
Description Standard VD Low. Temp. VD Arctic VD model
Temp. range -20 °C to +85 °C -40 °C to +70 °C -53 °C to +70 °C
Type code ref.
(sign 6-9)
Note:
1. Temperature: Ambient temperature
2. Type code reference: Please see in page 17 (materials).
3. Other low temperature ranges: Please contact Metso
AEAK AELK ASSK
Fig. 1 VDD, Direct & VDR, Reverse
Table 2. VD Actuators air supply connections
Stardard 1/4" NPT for all sizes
Optional 3/8", 1/2" NPT and others
4 6 DA 70 en
Table 3. VD Actuators specifications
Actuator
Size
Effective Area Volume Actuator Stem Size Ø Maximum Stroke Max. Allowable
cm
2
inch
2
dm
3
inch
3
mm inch mm inch bar psi
VD_25 270 42 0.9 54.9 24.0 0.95 20 0.8
VD_29 390 60 1.8 109.8 24.0 0.95 40 1.6
VD_37 640 99 3.5 213.5 24.0 0.95 50 2.0
VD_48 1130 175 10.2 622.4 35.0 1.38 70 2.8
VD_55 1520 236 18.2 1110 35.0 1.38 80 3.2
Table 4. VD Actuators spring ranges
VDR (Signal Increrased to Open) VDD (Signal Increrased to Close)
Actuator
Size
VD_25
VD_29
VD_37
VD_48
VD_55
Spring Range
bar psi bar psi mm inch bar psi bar psi mm inch
0.8~2.6 11~37 3.2 44
1.5~3.4 21~48 3.9 55 1.5~3.4 21~48 3.9 55
0.8~2.6 11~37 3.2 44
1.5~3.4 21~48 3.9 55 1.5~3.4 21~48 3.9 55
0.8~2.6 11~37 3.5 44
1.5~3.4 21~48 3.9 55 1.5~3.4 21~48 3.9 55
0.8~2.6 11~37 3.5 44
1.5~3.4 21~48 3.9 55 1.5~3.4 21~48 3.9 55
0.8~2.6 11~37 3.5 44
1.5~3.4 21~48 3.9 55 1.5~3.4 21~48 3.9 55
Recommended
Supply Pressure
Max. Travel Spring Range
20 0.8
40 1.6
50 2.0
70 2.8
80 3.2
0.8~2.6 11~37 3.2 44
0.8~2.6 11~37 3.2 44
0.8~2.6 11~37 3.5 44
0.8~2.6 11~37 3.5 44
0.8~2.6 11~37 3.5 44
Recommended
Supply Pressure
Pressure
4.2 60
Max. Travel
20 0.8
40 1.6
50 2.0
70 2.8
80 3.2
Table 5. VD & VC stroking time table
Act'r
Series
Stroke
length
Controller
Series
VD_25 20mm NDX 3 3 VD_25 20mm
VD_29
20mm
40mm 3 4 40mm 8 10
NDX
20mm
VD_37
40mm 3.5 4 40mm 11 16 120mm 11 12
NDX
50mm 4 5 50mm ND9206 7 8
20mm
40mm 3.5 5 40mm 9 11 140mm 17 16
VD_48
50mm 4 6 50mm 10 12
NDX
60mm 5 6.5 60mm 11 13 140mm 21 19
70mm 6 7.5 70mm 12 14 180mm 25 21
20mm
40mm 4 7 40mm 12 15 180mm 24 22
VD_55
50mm 5 8 50mm 14 17 240mm 28 27
60mm 6 9 60mm 16 19
NDX
70mm 7 10 70mm 18 21 240mm 35 31
80mm 8 11 80mm 20 23 280mm 39 34
Note:
- Mounted with ND9 / NDX smart positioners and B72G-2AS-980 AFR only.
- VD model / spring range : VDR / 0.8 ~ 2.6 bar
- Stroking time accuracy: ± 10 %
- Supply pressure for VD_25/29/37 is 3.2 bar and VD_48&55 is 3.5 bar.
Stroking
time (Sec.)
Load Vent Load Vent Load Vent
Act'r
Series
Stroke
length
Controller
Series
ND9202 5 7
ND9203 4 5 80mm 8 8
33
VD_29
33.5
VD_37
34
VD_48
36
VD_55
20mm
20mm
20mm
20mm
ND9203
ND9203
ND9203
ND9206
ND9206
Stroking
time (Sec.)
Act'r
Series
VC_30
Stroke
length
60mm
Controller
Series
ND9206
Stroking
time (Sec.)
67
5 7 100mm 10 10
80mm
9 11 100mm 10 11
VC_40
ND9206
100mm
16 19 120mm 15 14
VC_50
ND9206
120mm
911
VC_60
140mm
VC_70
ND9206
ND9206
180mm
VC_80
ND9206
810
13 13
18 16
20 19
31 30
6 DA 70 en 5
1.5 Recycling and disposal
Most actuator parts can be recycled if sorted according to
material. Most parts have material marking. A material list is
supplied with the actuator. In addition, separate recycling
and disposal instructions are available from the manufacturer. An actuator can also be returned to the manufacturer
for recycling and disposal against a fee.
1.6 Safety precautions
CAUTION:
Don’t exceed the permitted values!
Exceeding the permitted pressure value marked on the
actuator may cause damage and lead to uncontrolled
pressure release in the worst case. Damage to the equipment and personal injury may result.
CAUTION:
Don’t dismantle a pressurized actuator!
Dismantling a pressurized actuator leads to uncontrolled
pressure release. Shut off the supply pressure and release
pressure from the diaphragm case before dismantling the
actuator.
Otherwise, personal injury and damage to equipment
may result.
CAUTION:
Follow the instructions given on the actuator warning
plates!
CAUTION:
Before opening the diaphragm case fastening screws,
release spring tension directed on actuator warning
plate and in these instructions!
CAUTION:
Take the weight of the actuator or valve combi
nation into account when handling it!
Do not lift the valve combination from the actuator, positioner, limit switch or their piping. Lift the actuator as
directed in Section 2, lifting ropes for a valve combination
should be fastened around it. The weights are shown in
Section 9. Dropping may result in personal injury or damage to the equipment.
2 TRANSPORTATION, RECEPTION AND
STORAGE
Make sure that the actuator and associated equipment have
not been damaged during transportation. Store the actuator
carefully before installation, preferably indoors in a dry place.
Do not take it to the installation site or remove the protective
caps of ports for piping until just before installation.
Lift the actuator as shown in Fig. 4. in an upright from an
eye bolt screwed in the place of a stop screw. Refer to Section 9 for weights.
Fig. 4 Lifting the complete valve & actuator
3 MOUNTING AND REMOVAL
3.1 Actuator air supply
Dry compressed air or natural gas can be used in actuators
in open-close operation, no oil spraying is needed. Clean,
dry and oil-free instrument air must be used for diaphragm
actuators with a positioner. The air supply connections are
presented in the dimensional drawings in Section 9. The
maximum supply pressure is 4.2 bar.
3.2 Mounting the actuator on the valve
CAUTION:
Take the weight of the actuator or valve combination
into account when handling it!
CAUTION:
Beware of the cutting movement of the valve!
Several types of Metso valves can be used with suitable
clamps. Refer to the selected valve model manuals for further information on their installation, maintenance and
operation.
CAUTION:
Beware of the plug movement!
Do not use air pressure higher than what specified on the
identification plate.
6 6 DA 70 en
1
4
3
5
2
6
7
8 9
10
13
12
11
15
16
17
18
20
21
22
23
24
25
32
32a
33
33a
30
30a
1
4
3
5
2
6
7
8 9
10
13
12
11
15
16
17
18
20
21
22
23
24
25
32
32a
33
34
33a
30
30a
26
27 28
26
27 28
29
24a
24a
29
3.2.1 Actuator mounting for VDD, Direct <air to close, stem extend> actuator
See Fig. 5.
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.
Down the top stem (18), using by specified air pres-
sure.
Adjustment stem length after clamping the clamp
(26) according to rated travel (stroke) as ‘open’ and
‘close’ position as per pressurizing and depressurizing the upper diaphragm chamber (see 4.8 for stem
adjustment).
Tighten the 4 socket head screws (27) with hexagon
nuts (28) and the lower stem locknut.
Fig. 5 VD Actuator Constructions without Handwheel
3.2.2 Actuator mounting for VDR, Reverse <air to open, stem retract> actuator
See Fig. 5.
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
(26) according to rated travel (stroke) as ‘open’ and
‘close’ position as per pressurizing and depressurizing the lower diaphragm chamber (see 4.8 for stem
adjustment).
Tighten the 4 socket head screws (27) with hexagon
nuts (28) and the plug stem locknut.
CAUTION:
Avoid to turn the valve plug and stem when plug is on
seat ring to prevent the seating line from being damaged.
The installation position can be selected freely, but Metso
recommends installation with the upright. The actuator is
thus best protected against damage due to supply air
impurities or water.
When necessary, lubricate the actuator stem and guide
with Cortec VCI 369 or an equivalent anti-corrosive agent to
prevent it from jamming due to rust.
The actuator must not be allowed to come in contact with
the pipework, because the vibrations may damage it or
cause unsatisfactory operation.
3.3 Removing the actuator from the valve
3.3.1 Actuator removal for VDD,
See Fig. 5 and exploded view.
Shut off and disconnect the air supply lines and
accessories.
Loosen the plug stem locknut and the 4 socket head
screws (27) with hexagon nuts (28).
Remove the clamp (26).
Support the actuator with the suitable lifting device.
Direct <air to close, stem extend> actuator
Remove the yoke nut.
Remove the actuator from the valve body assembly.
6 DA 70 en 7
3.3.2 Actuator removal for VDR, Reverse <air to open, stem retract> actuator
See Fig. 5 and exploded view.
Lift up to the valve plug 100 % from the seat ring,
using by specified air pressure.
Loosen the plug stem locknut and the 4 socket head
screws (27) with hexagon nuts (28).
Remove the stem clamp (26).
Shut off and disconnect air supply line.
Support the actuator with the suitable lifting device.
Remove the yoke nut.
Remove the actuator from the valve body assembly.
CAUTION:
Avoid to turn the valve plug and stem when plug is on
seat ring to prevent the seating line from being damaged.
4 MAINTENANCE
CAUTION:
Observe the safety precautions listed in Section 1.6
before starting work!
CAUTION:
When handling the actuator or the control valve
assembly, take its weight into account!
4.1 General
Although the Neles VD actuators require no regular maintenance.
However, check the vent port and the diaphragm with case
and the guide bushing for leakage, proper preventative
maintenance can significantly help to prevent unplanned
downtime and in real terms reduce the total cost of ownership. Metso recommends inspecting the valves at least every
five (5) years. The inspection and maintenance interval
depends on the actual
application and process condition. The inspection and maintenance intervals can be specified together with your local
Metso experts. During this periodic inspection the parts
detailed in the Spare Part Set should be replaced. Time in
storage should be included in the inspection interval.
Maintenance can be performed as presented below. For
maintenance assistance, please contact your local Metso
office. The part numbers in the text refer to the exploded
view and to the parts list in Section 8, unless otherwise
stated.
NOTE:
When sending goods to the manufacturer for repair, do
not disassemble them. Clean the valve carefully and flush
the valve internals. For safety reasons, inform the manufacturer of the type of medium used in the valve (include
material safety datasheets (MSDS)).
NOTE:
In order to ensure safe and effective operation, always use
original spare parts to make sure that the valve functions
as intended.
NOTE:
For safety reasons, replace pressure retaining bolting if the
threads are damaged, have been heated, stretched or corroded.
NOTE:
If you send the actuator to the manufacturer for repair, do
not dismantle it. For safety reasons, please see the warning plate on the top side of actuator.
NOTE:
Always use original spare parts to make sure the valve
functions as intended.
CAUTION:
Do not dismantle the actuator or remove it from the
pipeline while the valve is pressurised!
4.2 Replacement diaphragm for VDD, Air to close
See Fig. 5 and Exploded view.
We recommend that all seals be replaced when the actuator has been dismantled for servicing.
The actuator must be depressurized and the supply air
pipes disconnected.
Detach the actuator.
Check that the actuator has been depressurized, and
remove air tubing from the upper case (20).
NOTE:
If actuator is equipped with the handwheel, rotate
handwheel to a neutral position.
Remove the short hexagon screws (23, 24, dia-
phragm case bolts) and the hexagon nuts (25).
CAUTION:
Diaphragm case is under spring tension and is equipped with the long hexagon screws (24, tension bolts)
which must be removal last.
Remove the the long hexagon screws (24, tension
bolts) and the hexagon nuts (25). in cross steps to
relies spring tension gradually.
Remove the upper case (20).
Loosen the stem nut (33) and remove the lock
washer (33a) and the stem rod plate (16) with O-ring
(17).
Remove the diaphragm (6) and the diaphragm plate
(13) with the stopper (15) from the top stem (18).
Remove the spring seats (11) and springs (12).
Replace the U-packing (4) and O-ring (5) in the stem
guide (2).
CAUTION:
Checking whether scratched on the top stem (18) and
dirty particles inside of the stem guide (2) and the diaphragm and O-rings before reassembling.
NOTE:
Lubricate seal space and new O-ring with Unisilikon L250L
or equal silicone grease.
8 6 DA 70 en
Mount the spring seats (11) and springs (12).
NOTE:
Set the springs so that the coil ends are located toward
the actuator stem center, this will be assures best performance of the actuator.
Mount the diaphragm plate (13) with the stopper
(15) on the top stem (18).
Mount the replaced diaphragm (6).
Insert the replaced O-ring (17).
Mount the stem rod plate (16) and lock washer (33a),
stem nut (33) and tighten.
Mount the upper case (20).
Tighten the long hexagon screws (24, tension bolts)
the hexagon nuts (25) in equal steps until the cases
meet.
Replace the remaining the short hexagon screws
and nuts.
CAUTION:
Do not over tighten as this could possibly warp the
diaphragm cases.
4.3 Replacement diaphragm for VDR, Air to open
See Fig. 5 and Exploded view.
We recommend that all seals be replaced when the actuator has been dismantled for servicing.
The actuator must be depressurized and the supply air
pipes disconnected.
Detach the actuator.
Check that the actuator has been depressurized, and
remove air tubing from the lower case (10).
NOTE:
If actuator is equipped with the handwheel, rotate
handwheel to a neutral position.
Remove the short hexagon screws (23, 24, dia-
phragm case bolts) and the hexagon nuts (25).
CAUTION:
Diaphragm case is under spring tension and is equipped with the long hexagon screws (24, tension bolts)
which must be removal last.
Remove the the long hexagon screws (24, tension
bolts) and the hexagon nuts (25) in cross steps to
release spring tension gradually.
Remove the upper case (20).
Remove the spring seats (11) and springs (12).
Remove the diaphragm (6) and the diaphragm plate
(13) with the stopper (15) and O-ring (17) from the
top stem (18).
Replace the U-packing (4) and O-ring (5) in the stem
guide (2).
CAUTION:
Checking whether scratched on the stem guide (18)
and dirty particles inside of the stem guide (2) and the
diaphragm and O-rings before reassembling.
Mount the stem rod plate, the replaced O-ring (5),
diaphragm (6) and the diaphragm plate (13) with the
stopper (15) the top stem (18). Then, tighten.
Mount the spring seats (11) and springs (12).
NOTE:
Set the springs so that the coil ends are located toward
the actuator stem center, this will be assures best performance of the actuator.
NOTE:
Lubricate seal space and new O-ring with Unisilikon L250L
or equal silicone grease.
Mount the upper case (20).
Tighten the long hexagon screws (24, tension bolts)
the hexagon nuts (25) in equal steps until the cases
meet.
Replace the remaining short hexagon screws and
nuts.
CAUTION:
Do not over tighten as this could possibly warp the
diaphragm cases.
4.4 Operation the handwheel
See Fig. 6 and 7.
Check the current valve position should be 'AUTO'
position (see the stroke indicator, which is open or
close).
Turn over the locking device to release the
handwheel.
CAUTION:
Don`t operate the handwheel while the locking device
engaged, it can cause damage.
Operate the handwheel to be open or close position
--- Manual mode.
Return the stem position to be 'AUTO' position.
Return the locking device to be locked with the
'AUTO' position --- Auto mode.
6 DA 70 en 9
40
40D
40F
40W
40R
49
40V
40T
40S
46
50
50A
5383 54 58
54A
55
55A
56
59
56A
83D
VD, Side handwheel
57
83E
VDR
VDD
83C
40U
Fig. 6 VD_25/29/37, Actuator Constructions with Handwheel
Part No. Description Material
040 HANDLE BASE ASTM A216 gr. WCB
040D HEXAGON SCREW ISO 3506 A2-70
040F SPRING WASHER AISI 304
040R HANDLE BASE COVER JIS G3101-SS400
040S HEXAGON SCREW ISO 3506 A2-70
040T WASHER AISI 304
040U SPRING WASHER AISI 304
040V HEXAGON SCREW ISO 3506 A2-70
040W WASHER AISI 304
046 HANDLE ASTM B209 ALLOY 6061 T6
049 LOCKING HANDLE AISI 304
050 HANDLE INDICATOR ALUMINIUM
050A ROUND HEAD SCREW AISI 304
053 LEVER ARM ASTM A747 gr. CB7Cu-1
054 BEARING FLANGE AISI 304
054A BEARING FLANGE SCREW ISO 3506 A2-70
055 SHAFT FLANGE JIS G4051-S45C
055A SHAFT FLANGE SCREW AISI 304
056 LEVER ARM SHAFT AISI 304
056A SNAP RING AISI 304
057 THRUST BALL BEARING JIS G3101-SS400
058 SNAP RING AISI304
059 DU DRY BEARING AISI 304+PTFE+Pb
083 HANDLE SHAFT JIS G4051-S45C
083C SHAFT PIN AISI 304
083D SPLIT PIN CARBON STEEL +ZINC
083E SHAFT GUIDE AISI 304
10 6 DA 70 en
1
18
32A
32
4
3
5
6
7
9
8
10
11
12
13
15
16
17
2
20
21
22
23
24
25
33A
34
40
40R
43
48
49
50
51
52
30
30A
31A
33
40B
40A
40E
40D
40J
40K
40L
42
40S
40T
40U
41A
41B
41C
41R
48A
48B
48C
49A
49B
50B
51A
4
3
5
7
9
8
24
25
40R
43
48
50
51
30
30A
31A
40J
40K
40L
42
40S
40T
40U
41A
41B
41C
41R
48A
48B
48C
49A
49B
50B
51A
1
32A
32
2
10
20
21
22
23
40
18
49
33
33A
17
40B
40A
40D
40E
16
6
13
11
12
14
15
44
VDD, Top side handwheel
VDR, Top side handwheel
Fig. 7 VD_ 48/55, Standard parts & materials with handwheel
6 DA 70 en 11
Part No. Description Material
040 HAND WHEEL BASE JIS G3101-SS400
040A 0-RING NITRILE, NBR
0408 0-RING NITRILE, NBR
040D HEXAGON SCREW ISO 3506 A2-70
040E WASHER BRONZE
040J HEXAGON SCREW ISO 3506 A2-70
040K WASHER AISI304
040L SPRING WASHER ISO 3506 A2-70
040R HAND WHEEL COVER JIS G3101-SS400
040S HEXAGON SCREW ISO 3506 A2-70
040T WASHER AISI304
040U SPRING WASHER AISI304
041A 0-RING NITRILE, NBR
0418 0-RING NITRILE, NBR
041C U-PACKING NITRILE, NBR
041R HAND WHEEL GUIDE BUSH BRASS
042 SCREW GUIDE PLATE JIS G3101-SS400
043 HAND WHEEL SCREW AISI304
044 HAND WHEEL STEM JIS G3101-SS400+ Zn
048 GEAR BOX DUCTILE IRON
048A GEAR BOX CAP PMMA
0488 STICKER
048C 0-RING NITRILE, NBR
049 LOCKING HAND WHEEL JIS G3101-SS400
049A HEXAGON SCREW ISO 3506 A2-70
0498 SPRING WASHER AISI304
050 HAND WHEEL INDICATOR ALUMINIUM
0508 HEXAGON SCREW ISO 3506 A2-70
051 INDICATOR PLATE AISI304
051A HEXAGON NUT ISO 3506 A2-70
12 6 DA 70 en
4.5 Removal & mounting of the handwheel bundle
See Fig. 6 and 7.
Check the current valve position should be 'AUTO'
position.
Turn over the locking device to be released the
handwheel.
Operate the handwheel to be open or close position
--- Manual mode.
Hold the handwheel bundle by lifting device.
Remove the hexagon screws (40d) and spring wash-
ers (40f) from the yoke side
Repair or replace the parts if necessary.
NOTE:
We recommend that to replace the bearing (57) with Mob
no. 2 grease or equal when the annual shutdown.
Remounting: follow reversed procedures from the
last step through first step.
Return the locking device to be locked with the
'AUTO' position --- Auto mode.
CAUTION:
Keep your fingers, tools or other items out of the
housing while operating the actuator with the cover
open!
Lift up the handwheel bundle using by lifting
devices from the yoke side.
CAUTION:
Lift the handwheel bundle using by lifting devices,
don`t lift by only hand for the safety.
Table 6. VD Tightening torques for screws
PN Description Screw Size Q`ty VD Required Torques for Each Size
#25 #29 #37 #48 #55
N.m Lbf.ft N.m Lbf.ft N.m Lbf.ft N.m Lbf.ft N.m Lbf.ft
8"Hexagon Screw
(for #10, Lower Case)"
21 "Lifting Eye Nut
(for #10 & 20, Cases)"
24a, 25 "Hexagon Nut
(for #10 & 20, Cases)"
28 "Hexagon Nut
(for #26, Clamp)"
33 "Stem Nut
(for #18, Top Stem)"
for VD Handwheel Screws
40D Hexagon Screw M8 x 1.25P 4 26 19 26 19 26 19
40S Hexagon Screw M8 x 1.25P 2 26 19 26 19 26 19
40V Hexagon Screw M8 x 1.25P 2261926192619
50A Round Head Screw M4 x 0.7P68686868686
54A Bearing Flange Screw M12 x 1.75P 2 34 25 34 25
M12 x 1.75P 4 34 25 34 25 34 25
M16 x 2.0P 6 65 48 65 48
M8 x 1.25P 2261926192418
M12 x 1.75P 2 24 18 32 24
M8 x 1.25P 10 26 19
M8 x 1.25P 14 26 19
M8 x 1.25P 18 24 18
M12 x 1.75P 18 24 18
M12 x 1.75P 22 32 24
M6 x 1.0P 4221622162216
M10 x 1.5P 4 26 19 26 19
M16X2.0P 1654865486548
M24X1.5P 1 180 133 180 133
M14 x 2.0P 4 50 37 50 37
M10 x 1.5P 2 26 19 26 19
M10 x 1.5P 2 26 19 26 19
M16 x 2.0P 2 65 48
M22 x 2.5P 2 120 88 120 88
Note :
1. Torque value tolerance : ± 10 %
2. Torques are norminal values.
6 DA 70 en 13
4.6 Change of the spring range
4.6.1 Change of the spring range: VDD, Air to close
See Fig. 5,6 and Exploded view (Fig. 9)
We recommend that all seals be replaced when the actuator has been dismantled for servicing.
The actuator must be depressurized and the supply air
pipes disconnected.
Detach the actuator.
Check that the actuator has been depressurized, and
remove air tubing from the upper case (20).
NOTE:
If actuator is equipped with the handwheel, rotate
handwheel to a 'AUTO' position.
Loose and remove the short hexagon screws (23, 24,
diaphragm case bolts) and the hexagon nuts (25).
CAUTION:
Diaphragm case is under spring tension and is equipped with the long hexagon screws (24, tension bolts)
which must be removal last.
Loose and remove the the long hexagon screws (24,
tension bolts) and the hexagon nuts (25) in cross
steps to release spring tension gradually.
Remove the upper case (20).
Loose the stem nut (33) and remove the lock washer
(33a).
Remove the stem rod plate (16) with inserted o-ring
(17) from top stem (18).
Remove the diaphragm (6) and diaphragm plate (13)
and stopper (15) from the top stem (18).
Remove the spring seats (11) and springs (12).
Replace the springs (12) according to required speci-
fication.
CAUTION:
Checking whether scratched on the top stem (18) and
dirty particles inside of the stem guide (2) and the diaphragm and o-rings before reassembling.
NOTE:
Lubricate seal space and new o-ring with Unisilikon L250L
or equal silicone grease.
NOTE:
Set the springs so that the coil ends are located toward
the actuator stem center, this will be assures best performance of the actuator.
Replace the long hexagon screws (24, tension bolts)
and the hexagon nuts (25).
Reassembling: to follow reverse procedures from the
last step through first step.
CAUTION:
Do not over tighten the hexagon screws as this could
possibly warp the diaphragm and cases, see torque
values on the table 6.
4.6.2 Change of the spring range: VDR, Air to open
See Fig. 5,6 and Exploded view (Fig. 10)
We recommend that all seals be replaced when the actuator has been dismantled for servicing.
The actuator must be depressurized and the supply air
pipes disconnected.
Detach the actuator.
Check that the actuator has been depressurized, and
remove air tubing from the lower case (10).
NOTE:
If actuator is equipped with the handwheel, rotate
handwheel to a 'free position`.
Loose and remove the short hexagon screws (23, 24,
diaphragm case bolts) and the hexagon nuts (25).
CAUTION:
Diaphragm case is under spring tension and is equipped with the long hexagon screws (24, tension bolts)
which must be removal last.
Loose and remove the the long hexagon screws (24,
tension bolts) and the hexagon nuts (25). in cross
steps to release spring tension gradually.
Remove the upper case (20).
Remove the spring seats (11).
Replace the springs (12) according to required speci-
fication.
NOTE:
Set the springs so that the coil ends are located toward
the actuator stem center, this will be assures best performance of the actuator.
Replace the long hexagon screws (24, tension bolts)
and the hexagon nuts (25).
Reassembling: follow reversed procedures from the
last step through first step.
CAUTION:
Do not over tighten the hexagon screws as this could
possibly warp the diaphragm and cases, see torque
values on the table 6.
4.7 Change of the actuator action
4.7.1 Change of the actuator action: VDD, Air to close --> VDR, Air to open
See Fig. 5 and Exploded view.
We recommend that all seals be replaced when the actuator has been dismantled for servicing.
The actuator must be depressurized and the supply air
pipes disconnected.
Detach the actuator.
Check that the actuator has been depressurized, and
remove air tubing from the upper case (20).
NOTE:
If actuator is equipped with the handwheel, rotate
handwheel to a 'AUTO' position.
14 6 DA 70 en
Loose and remove the short hexagon screws (23, 24,
diaphragm case bolts) and the hexagon nuts (25).
CAUTION:
Diaphragm case is under spring tension and is equipped with the long hexagon screws (24, tension bolts)
which must be removal last.
Loose and remove the the long hexagon screws (24,
tension bolts) and the hexagon nuts (25). in cross
steps to release spring tension gradually.
Remove the upper case (20).
Loose the stem nut (33) and remove the lock washer
(33a).
Remove the stem rod plate (16) with inserted o-ring
(17) from top stem (18).
Remove the diaphragm (6) and diaphragm plate (13)
and stopper (15) from the top stem (18).
Remove the spring seats (11) and springs (12).
CAUTION:
Checking whether scratched on the top stem (18) and
dirty particles inside of the case and the diaphragm
and o-rings before reassembling.
Mount the stem rod plate (16) with inserted o-ring
(17) on the top stem (18).
Mount the the diaphragm (6) and diaphragm plate
(13).
Mount the the stopper (15) on the top stem (18).
Mount the lock washer (33a) and stem nut (33) and
tighten.
Mount the spring seats (11) and springs (12).
NOTE:
Set the springs so that the coil ends are located toward
the actuator stem center, this will be assures best performance of the actuator.
Mount the upper case (20).
Replace and tighten the long hexagon screws (24,
tension bolts) and hexagon nuts (25) in equal steps
until the cases meet.
Replace and tighten the remaining the short hexa-
gon screws and nuts.
CAUTION:
Do not over tighten the hexagon screws as this could
possibly warp the diaphragm and cases, see torque
values on the table 6.
Mount the vent cap (34) on the upper case (20) for
prevent go water, dirty particles into the actuator.
To connect the related instrument fitting and tub-
ings on the bottom side of lower case (10).
4.7.2 Change of the actuator action: VDR, Air to open --> VDD, Air to close
See Fig. 5 and Exploded view.
We recommend that all seals be replaced when the
actuator has been dismantled for servicing.
The actuator must be depressurized and the supply
air pipes disconnected.
Detach the actuator.
Check that the actuator has been depressurized, and
remove air tubing from the lower case (10).
NOTE:
If actuator is equipped with the handwheel, rotate
handwheel to a 'AUTO' position.
Loose and remove the short hexagon screws (23, 24,
diaphragm case bolts) and the hexagon nuts (25).
CAUTION:
Diaphragm case is under spring tension and is equipped with the long hexagon screws (24, tension bolts)
which must be removal last.
Loose and remove the the long hexagon screws (24,
tension bolts) and the hexagon nuts (25). in cross
steps to release spring tension gradually.
Remove the upper case (20).
Remove the spring seats (11) and springs (12).
Loose the stem nut (33) and remove the lock washer
(33a).
Remove the stopper (15) and the diaphragm plate
(13) and diaphragm (6) from the top stem (18).
Remove the stem rod plate (16) with inserted o-ring
(17) from top stem (18).
CAUTION:
Checking whether scratched on the top stem (18) and
dirty particles inside of the case and the diaphragm
and o-rings before reassembling.
Mount the spring seats (11) and springs (12) on the
lower case (10).
NOTE:
Set the springs so that the coil ends are located toward
the actuator stem center, this will be assures best performance of the actuator.
Mount the the stopper (15) on the top stem (18).
Mount the diaphragm plate (13) and the diaphragm
(6).
Mount the stem rod plate (16) with inserted o-ring
(17) on the top stem (18).
Mount the lock washer (33a) and stem nut (33) and
tighten.
Mount the upper case (20).
Replace and tighten the long hexagon screws (24,
tension bolts) and hexagon nuts (25) in equal steps
until the cases meet.
Replace and tighten the remaining the short
6 DA 70 en 15
Model VDD
Maximum stop
Optional Adjustable Limit stop
Model VDR
Minimum stop
Optional Adjustable Limit stop
4.8 Adjustment for valve stem
4.8.1 Model VDD, Air to close
See Fig. 5, 6, 7, 8 and 9.
CAUTION:
Avoid to turn the valve plug and stem when plug is on
seat ring to prevent the seating line from being damaged.
With the handwheel or pneumatically, stroke the
actuator to the rated range or stroke.
Unscrew the socket head screws (27) and hexagon
nut (28) by one turn.
Using the stem lock nut, unscrew the stem until the
plug touches the seat.
Release the pressure in the actuator or returned the
handwheel to raise the stem.
Line up the stroke indicator (32) with the clamp
arrow (26) and check actuator for operation.
To adjust with rotating valve stem if the stroke is
inconsistent with the rated stroke.
Tighten the socket head screws (27) and hexagon
nut (28) after adjusted the rated stroke.
Keep the actuator stem is fully extended.
Unscrew the socket head screws (27) and hexagon
nut (28) by one turn.
Using the stem lock nut, unscrew the stem until the
plug touches the seat.
With the handwheel or pneumatically, stroke the
actuator to raised the plug off the seat.
Line up the stroke indicator (32) with the clamp
arrow (26) and check actuator for operation.
To adjust with rotating valve stem if the stroke is
inconsistent with the rated stroke.
Tighten the socket head screws (27) and hexagon
nut (28) after adjusted the rated stroke.
4.9 Maximum & minimum stopper
See Fig. 8
4.8.2 Model VDR, Air to open
See Fig. 5, 6, 7,8 and 9.
CAUTION:
Avoid to turn the valve plug and stem when plug is on
Fig. 8 Max./Min. stopper
seat ring to prevent the seating line from being damaged.
5 MALFUNCTIONS
Table 7. Possible malfunctions
Symptom Possible cause Action
Irregular or slow operation Low supply pressure Make sure that supply pressure complies with minimum
force required by valve.
Check that supply air pipes are large enough.
Positioner fault Check positioner operation.
Valve fault Check that valve functions properly without actuator.
Incorrect actuator rating Contact manufacturer to check rating.
Leak in diaphragm case or O-rings Replace O-rings. See sect. 4.2 or 4.3, depending on
actuator type.
6TOOLS
Removal of the actuator
wrench set (mm)
hex socket wrench set
chisel and hammer (10 pound)
drivers
7 ORDERING SPARE PARTS
NOTE:
Always use original spare parts to make sure that the valve
functions as intended.
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.
16 6 DA 70 en
8 EXPLODED VIEWS AND PARTS LIST VDD, Direct Acting, Air to Stem Extended
6 DA 70 en 17
VDR, Reverse Acting, Air to Stem Retracted
18 6 DA 70 en
Series VD
Item Description Recommended spare part
1YOKE
2STEM GUIDE
30-RING X
4 U-PACKING X
50-RING X
6DIAPHRAGM X
70-RING X
8 HEXAGON SCREW
9 WASHER
10 LOWER CASE
11 SPRING SEAT
12 SPRING
13 DIAPHRAGM PLATE
15 STOPPER
16 STEM ROD PLATE
17 0-RING X
18 TOP STEM
20 UPPER CASE
21 LIFTING EYE NUT
22 WASHER
23 HEXAGON SCREW
24 HEXAGON SCREW
24a HEXAGON NUT
25 HEXAGON NUT
26 CLAMP
27 SOCKET HEAD SCREW
28 HEXAGON NUT
30 IDENTIFICATION PLATE
30a RIVET
31a STICKER (WARNING)
32 INDICATOR
32a ROUND HEAD SCREW
33 STEM NUT
33a LOCK WASHER
34 VENT CAP
6 DA 70 en 19
Standard spring High spring
Standard spring
VDD/R E VDD/R D
Side ha ndwheel(25/29/37)
VDRVDD
9 DIMENSIONS AND WEIGHTS
Dimension
(mm)
Size
(mm)
A2 Bd / Bhd Br / Bhr
Without handwheel With handwheel
Weight
(kg)
A2 A3 Bdh Brh
Weight
(kg)
VD_25 E 255 348 373 12 255 312 110 170 23
VD_25 D 255 373 395 17
VD_29 E 295 391 416 18 295 312 122 182 29
VD_29 D 295 431 453 26
VD_37 E 375 464 489 28 375 352 131 211 43
VD_37 D 375 514 535 46
Dimension
(inch)
Size
(inch)
A2 Bd / Bhd Br / Bhr
Without handwheel With handwheel
Weight
(kg)
A2 A3 Bdh Brh
Weight
(kg)
VD_25 E 10 14 15 26 10 12 4 7 51
VD_25 D10151637
VD_29 E121516401212 5 7 64
VD_29 D 12 17 18 57
VD_37 E151819621514 5 8 95
VD_37 D 15 20 21 101
20 6 DA 70 en
Top side handwheel(VDD48/55) Top side handwheel(VDR48/55)
Dimension
(mm)
Size
(mm)
A2 Bd / Bhd Br / Bhr
Without handwheel With handwheel
Wei ght
(kg)
A2 A3 Bdh Brh
VD_48 E 486 652 677 86 896 865 1102 1072 112
VD_48 D 486 702 724 118
VD_55 E 566 695 720 112 940 910 1145 1115 145
VD_55 D 566 745 767 152
Dimension
(inch)
Size
(inch)
A2 Bd / Bhd Br / Bhr
Without handwheel With handwheel
Wei ght
(kg)
A2 A3 Bdh Brh
VD_48 E 19 26 27 190 35 34 43 42 247
VD_48 D 19 28 29 260
VD_55 E 22 27 28 247 37 36 45 44 320
VD_55 D 22 29 30 335
NOTE
1. "E" refers to Spring range 0.8~2.6
2. "D" refers to Spring range 1.5~3.4
3. "Br / Bhr" refers to reverse acting actuator, VDR E / D
4. "Bd / Bhd" refers to direct acting actuator, VDD E / D
5. "Cdh / Crh" Top side handwheel actuator, VD_48/55
Weight
(kg)
Weight
(kg)
6 DA 70 en 21
10 TYPE CODE
Pneumatic Diaphragm Actuator, Linear Type, Series VD
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.
VD R 25 E 020 A E A K X X A X R
ACTUATOR CONSTRUCTIONS MATERIALS
1. ACTUATOR SERIES
VD Pneumatic Diaphragm actuator, Linear type
6. ACTUATOR CASE MATERIAL
A JIS G3101-SS400 (ASTM A-36)
Y Special
2.
D Direct acting Open Extended
R Reverse acting Close Retracted
3.
25 Ø255 mm
29 Ø295 mm
37 Ø375 mm
48 Ø486 mm
55 Ø566 mm
4.
E 0.8 - 2.6 11 - 37 3.2 bar / 44 psi
D 1.5 - 3.4 21 - 48 3.9 bar / 55 psi
Y Special Special Special
5.
020 20 mm STD STD STD IQI IQI
030 30 mm N/A STD STD IQI IQI
040 40 mm N/A STD STD STD STD
050 50 mm N/A N/A STD STD STD
060 60 mm N/A N/A N/A STD STD
070 60 mm N/A N/A N/A STD STD
080 80 mm N/A N/A N/A N/A STD
YYY Special Contact Metso for special stroke
Direction Spring to Air to Stem
bar psi Supply Air Press.
Desc. VD_25 VD_29 VD_37 VD_48 VD_55
FUNCTION CODE
ACTUATOR SIZE
Outline Dimension
SPRING RANGE
Optional Spring Range
STROKE
7.
E EPDM General material for -20 to 85 °C
S Low temp. Silicone Low temp material up to -53 °C
Y Special Other special material
8.
A Nitrile Rubber General material for -20 to 85 °C
L Low temp. NBR Low temp material up to -40 °C
S Low temp. Silicone Low temp material up to -53 °C
Y Special Other special material
9. BOLTING MATERIAL
K Stainless steel
Y Special
Material Description
Material Description
DIAPHRAGM MATERIAL
SEAL MATERIAL
OTHERS
10. POSITION LIMITATION
X Not applicable
M Mechanical Stopper
Y Special
11. EXTERNAL OVERRIDE OPTION
X Not applicable
A Side Handwheel mounted (applicable 25/29/37 sizes only)
T Top-Side Handwheel mounted (applicable 48/55 sizes only)
Y Special mounting side or Special H/W construction
- Handwheel is not applicable for 'D' spring option (sign 4).
- Field reversible function is not available with H/W construction.
Optional Application
12.
A 1/4" NPT VD_25/29/37/48/55
Y Special
13. OPTIONS
X Not applicable
Y Special
14. MODEL CODE
R Model R
Connection Size Actuator Size
AIR SUPPLY CONNECTION
22 6 DA 70 en
6 DA 70 en 23
South Korea, 235 Cheomdansaneop 1-ro, Daesowon-myeon, Chungju-si, Chungbuk-do, 27466, Korea Tel. +82 43 852 7708, Fax +82 43 841 9890
Europe, Vanha Porvoontie 229, P.O. Box 304, FI-01301 Vantaa, Finland. Tel. +358 20 483 150. Fax +358 20 483 151
North America, 44 Bowditch Drive, P.O. Box 8044, Shrewsbury, M A 01545, USA. Tel. +1 508 852 0200. Fax +1 508 852 8172
South America, Av. Independéncia, 2500-Iporanga, 18087-101, Sorocaba-São Paulo, Brazil. Tel. +55 15 2102 9700. Fax +55 15 2102 9748
Asia Pacic, 238B Thomson Road, #17-01 Novena Square Tower B, Singapore 307685. Tel. +65 6511 1011. Fax +65 6250 0830
China, 11/F, China Youth Plaza, No.19 North Rd of East 3rd Ring Rd, Chaoyang District, Beijing 100020, China. Tel. +86 10 6566 6600. Fax +86 10 6566 2583
Middle East, Roundabout 8, Unit AB-07, P.O. Box 17175, Jebel Ali Freezone, Dubai, United Arab Emirates. Tel. +971 4 883 6974. Fax +971 4 883 6836
www.metso.com/valves
Metso Flow Control Inc.
24 6 DA 70 en
Loading...