Metso ANSI CLASS 125, ANSI CLASS 150, ANSI CLASS 250, ANSI CLASS 300, ANSI CLASS 600 Maintance Manual

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1 1/2"–6" SERIES G110

ANSI CLASS 125, 150, 250, 300, 600

CAGE TRIM GLOBE AND

ANGLE VALVES

Installation, Maintenance,

and Operating Instructions

IMO - 806

ISSUE 1/02

2

READ THESE INSTRUCTIONS FIRST!

These instructions provide information about safe handling and operation of the valve.
If you require additional assistance,please contact your authorized Metso Automation representative.

SAVE THESE INSTRUCTIONS!

Subject to change without notice.

Table of Contents

1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.3 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.4 Unpackaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1 Final Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.1 Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.2 Removal from Pipeline . . . . . . . . . . . . . . . . . . . . . 4

3.3 Actuator Removal . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.4 Valve Body Disassembly . . . . . . . . . . . . . . . . . . . 4

3.5 Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.6 Lapping of Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.7 Replacement of Soft Seat . . . . . . . . . . . . . . . . . . 5

3.8 Plug/Stem Disassembly . . . . . . . . . . . . . . . . . . . . 5

3.9 Packing Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.10 Bellows Sealed Valves . . . . . . . . . . . . . . . . . . . . . 6

4 VALVE BODY ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . 6

4.1 Plug/Stem Assembly . . . . . . . . . . . . . . . . . . . . . . 6

4.2 Body Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 ACTUATOR MOUNTING AND ADJUSTMENT. . . . . 7

5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

5.2 Actuator Mounting . . . . . . . . . . . . . . . . . . . . . . . . 7

5.3 Establishing Seat Load . . . . . . . . . . . . . . . . . . . . . 7

5.4 Valve/Actuator/Travel . . . . . . . . . . . . . . . . . . . . . . 7

5.5 Actuator Bench Set and Span . . . . . . . . . . . . . . . 7

3

1 GENERAL

1. These installation and maintenance instructions apply
to all sizes and ratings of the G110 Series control valves
regardless of the type of trim used.

1.1 Warning

FOR YOUR SAFETY AND PROTECTION, IT IS IMPORTANT
THAT THE FOLLOWING PRECAUTIONS BE TAKEN PRIOR TO
REMOVING THE VALVE FROM SERVICE OR BEFORE ANY DIS­ASSEMBLY OF THE VALVE:

1. AT ALL TIMES DURING THIS ENTIRE PROCEDURE, KEEP
HANDS OUT OF THE VALVE. A REMOTELY ACTUATED
VALVE COULD CLOSE AT ANY TIME AND RESULT IN
SERIOUS INJURY.

2. KNOW WHAT MEDIA IS IN THE LINE. IF THERE IS ANY
DOUBT, CHECK WITH THE PROPER AUTHORITY.

3. WEAR ANY PROTECTIVE CLOTHING OR EQUIPMENT
NORMALLY REQUIRED WHEN WORKING WITH THE
MEDIA INVOLVED.

4. DEPRESSURIZE THE LINE AND VALVE AS FOLLOWS:
A.) OPEN THE VALVE AND DRAIN THE LINE.
B.) CLOSE AND OPEN THE VALVE TO RELIEVE ANY

RESIDUAL PRESSURE THAT MAY BE IN THE VALVE
PRIOR TO REMOVING THE VALVE FROM SERVICE.

C.) AFTER REMOVAL AND PRIOR TO ANY DISASSEMBLY,

DRAIN ANY REMAINING MEDIA BY PLACING THE
VALVE IN THE VERTICAL POSITION AND CAREFULLY
OPENING AND CLOSING THE VALVE SEVERAL TIMES.

5. TRIM AND BODY RATINGS — THE PRACTICAL AND
SAFE USE OF THIS PRODUCT IS DETERMINED BY BOTH
THE TRIM AND BODY RATINGS. READ THE NAME TAG
AND CHECK BOTH RATINGS. THIS PRODUCT IS AVAIL­ABLE WITH A VARIETY OF TRIM MATERIALS. SOME OF
THE TRIM MATERIALS HAVE PRESSURE RATINGS THAT
ARE LESS THAN THE BODY RATINGS. ALL OF THE BODY
AND TRIM RATINGS ARE DEPENDENT ON VALVE TYPE
AND SIZE, TRIM MATERIAL, BOLTING MATERIAL, AND
TEMPERATURE. DO NOT EXCEED THESE RATINGS.

1.2 Introduction

THE FOLLOWING INSTRUCTIONS SHOULD BE THOROUGH­LY REVIEWED AND UNDERSTOOD PRIOR TO INSTALLING,
OPERATING OR PERFORMING MAINTENANCE ON THIS
EQUIPMENT. THROUGHOUT THE TEXT, SAFETY AND/OR
CAUTION NOTES WILL APPEAR AND MUST BE STRICTLY
ADHERED TO, OTHERWISE, SERIOUS INJURY OR EQUIP­MENT MALFUNCTION COULD RESULT.

1. A regularly scheduled training program is conducted
to train customer service and instrumentation person­nel in the operation, maintenance and application of
control valves and instruments. Arrangements for
these services can be made through your local repre­sentative. When performing maintenance, use only
Metso Automation replacement parts.Parts are obtain­able through your local representative.When ordering
parts, always include model and serial number of the
unit being repaired.The model number, serial number,
size and rating of the valve are shown on the identifi­cation tag located on the actuator.

1.3 Storage

1. When a valve is to be stored for an extended period,
remove the line connection covers and spray a light
coating of machine oil on the internals. Replace the
covers to prevent foreign matter from entering the
valve body. Exposed parts should also be sprayed with
a protective film of oil.

2. A packing list, containing a complete description of the
valve and accessories (such as a valve positioner, etc.),
accompanies each valve when shipped.This list should
be checked soon after the shipment has been received.

3. When hoisting the valve, make sure that ropes or
cables are of sufficient strength and are positioned so
that any tubing or accessories will not be damaged.

1.4 Unpackaging

1. Care must be exercised when unpacking the valve to
prevent damage to the accessories and component
parts. Should any problems arise, contact your local
representative.

2 INSTALLATION

1. The best performance will be obtained if the valve is
installed in a straight run of pipe away from elbows,
restrictors or other areas where abnormal velocities
may occur.The valve may be installed in any position,
however, the vertical upright position is strongly rec­ommended.

2. There should be at least one foot of clearance above
the actuator in order to perform in-line maintenance
operations.

3. A conventional three valve bypass should be installed
for systems which must continue in service during
periods of control valve maintenance.

4. Care should be taken in rigging the valve for installa­tion to assure that instruments or instrument lines are
not damaged.

5. Before installing the valve in the line, clean the piping
and the valve of all foreign material such as welding
chips, scale, oil, grease or dirt. Gasket surfaces should
be thoroughly cleaned to insure leak-proof joints.

6. Pipe threads should be clean and sharp. Apply pipe
compound or joint sealer to the male threads only. Be
sure that the compound or sealer is compatible with
the process fluid.

7. The valve must be installed so that the controlled sub­stance will flow through the valve in the direction indi­cated by the flow arrow located on the body.

8. Where insulation of the valve body is required,DO NOT
INSULATE THE VALVE BONNET.

9. An air supply pressure regulator with filter should be
installed in the air line ahead of any valve-mounted
instruments. Factory mounted positioners are piped
and adjusted at the factory.

4

2.1 Final Check

1. Turn on the instrument air supply and set pressure 5
psig greater than required by the bench set listed on
the label plate.

2. Check the air lines to the actuator for leaks.

3. Vary the air supply to the actuator to ascertain that the
actual valve travel (stroke) corresponds with the data in
Table 2.

4. Check to be sure that the combined actions (direct and
reverse) of the controller, positioner, etc., and valve,pro­duce desired direction of movement, and will ensure
the required valve position in the event of air supply
failure.

NOTE: Under actual operating conditions the pressure
drop across the valve may differ from the calculated fig­ures. Some actuators may require readjustment of the
spring preload in order to provide adequate shutoff force.
In this situation check to ensure that the actuator is still
capable of full valve travel with the available supply air
pressure.

5. Tighten the packing flange stud nuts evenly to assure
optimum sealing pressure on the stem and packing
box walls. Slightly more than finger tight should be
adequate to eliminate packing box leakage. Over tight­ening will restrict stem movement and adversely affect
the process control.

3 MAINTENANCE

3.1 Disassembly

READ THESE INSTRUCTIONS COMPLETELY, FOR YOUR SAFE­TY IT IS IMPORTANT THAT THE FOLLOWING PRECAUTIONS
BE TAKEN PRIOR TO REMOVAL OF THE UNIT FROM THE LINE
OR BEFORE ANY DISASSEMBLY.

1. Wear any protective equipment normally required
when working with the fluid involved during removal
and disassembly.

2. Depressurize and drain the pipeline with the valve
open prior to disconnecting service lines.

3. Before removing the instrument connections from the
actuator, shut off the air pressure and bleed the air
lines.

4. Have adequate rigging transport means available at
the valve before attempting to remove it from the
pipeline or before breaking the body/bonnet joint for
in-line service.

3.2 Removal From Pipeline

NNOOTTEE::

Maintenance such as diaphragm, packing or trim
replacement can be done without removing the valve
from the line.

1. Disconnect all instrument air and electrical lines from

the actuator.

2. Remove all inlet and outlet line flange studs and nuts,

and lift the valve out of the pipeline.

3. Secure the valve and actuator assembly firmly on a

work bench in an upright position in a manner to pre­vent tipping or falling over.

3.3 Actuator Removal

1. Connect instrument air to the actuator and apply signal
pressure sufficient to move the plug to a position only
slightly off the seat. This will remove the spring force
from the coupling before disassembly.

2. Disconnect the actuator coupling from the valve stem
by disengaging the coupling screws (Figure 1).
Disconnect air supply.

3. Unscrew the clamp nut from the bonnet by placing a
metal rod or blunt nosed chisel on the clamp nut lugs
and striking with a mallet.

4. Unscrew the clamp nut from the threads and lift the
nut over the plug stem.

5. Lift or hoist the actuator unit off the valve, taking care
to avoid damaging the plug stem, instruments or tub­ing.

NOTE: The actuator is removed from the body as a unit,
without disturbing the packing box bolt-bolting. Clamp
nut and actuator yoke will pass over the packing flange.

6. If maintenance is required on the actuator consult the
appropriate actuator IMO.

3.4 Valve Body Disassembly

1. Unscrew the packing flange nuts, and remove packing
flange and packing follower.

2. Remove the bonnet/body stud nuts.

3. Lift the bonnet while holding the plug stem (to prevent
the plug from dropping out), and carefully lift off the
valve body.Remove the cage and the seat ring from the
body.

4. Withdraw the plug and stem downward out of the
bonnet through the guide.

CAUTION: CARE MUST BE TAKEN TO AVOID DAMAGE TO
THE PLUG AND PLUG GUIDE.

5. Using a narrow hook or bent wire, pull the packing
rings and lantern spring out of the packing box.

CAUTION: WHEN REMOVING PACKING RINGS FROM THE
PACKING BOX, USE A HOOK, BENT WIRE, OR TOOL MADE
FROM A MATERIAL THAT IS SOFTER THAN THE BONNET
MATERIAL. THIS WILL PREVENT SCRATCHING OR MARRING
OF THE PACKING BOX SURFACES.

Figure 1 Actuator Removal

6. Clean the packing box thoroughly before replacing
packing.

7. Bonnet, plug, bushing, cage and seat ring may now be
inspected for wear and service damage. After deter­mining the maintenance required, proceed to the
appropriate section of this IMO.

3.5 Repair

1. The purpose of this section is to assist maintenance
personnel by suggesting methods of component
maintenance which may be largely dependent on the
tools and machine shop equipment available.Each sec­tion should be read and understood before proceed­ing.

3.6 Lapping of Seats

NOTE: Lapping is the process of working the valve plug

against the seat ring with an abrasive to produce a close fit.
When valve leakage becomes excessive, lapping becomes
necessary. The plug and seat ring seating surfaces should
be free of large scratches or dents,and the contact surfaces
of the seats should be as narrow as possible. Lapping can
correct shallow scratches or slight roughness only.
Excessive lapping produces a groove in the plug, therefore
plugs or seats having relatively deep scratches must be re­machined.

1. Lapping compound should be grade “A” or finer. The
compound should be mixed with a small quantity of
lubricant such as graphite. This will slow the cutting
rate and prevent tearing of the seat surfaces.

2. Apply lapping compound to the seating surface of the
seat ring only.Compound on the characterized portion
of the plug could increase the clearance between plug
and seat, thus changing the flow characteristic and
rangeability of the valve.

3. A film of light machine oil on the valve plug stem will
facilitate stem movement during the lapping proce­dure.

4. Carefully insert the valve plug and stem assembly into
the bonnet from the bottom.Avoid damaging the stem
threads or the walls of the guide bushing.

5. Position the bonnet and the plug assembly on the
body and install and tighten two or three body stud
nuts to secure the bonnet during lapping.

6. Install temporary packing so that the valve plug stem
will be aligned during the lapping operation. Any rope
packing may be used for this purpose.

7. Screw a lock nut onto the valve plug stem, then screw
the lapping tool onto the stem and lock it in position.

NOTE: A “T”handle for the valve plug stem can be made by
welding a nut (with threading to match the plug stem
threads) to the center of a rod. (See Figure 2.)

8. Lap with short, oscillating strokes. The weight of the
plug, stem, and lapping tool provides ample pressure
for lapping - do not bear down.

9. Raise the plug occasionally, lower it to another position
and resume the oscillating strokes. This ensures an
even lap over the entire seating surfaces of plug and
seat.

10. Approximately 5 to 10 minutes lapping time, with
grade A compound, is usually required to obtain a sat­isfactory fit between a new plug and seat.

11. Clean the plug and seat, then, holding the plug on the
seat by hand, apply compressed air to the inlet side of
the valve to check the tightness of the lapped parts.
Repeat the lapping procedure if necessary.

12. Disassemble the valve and clean all parts thoroughly.
Remove all traces of lapping compound. Remove the
temporary packing and clean the packing box.

3.7 Replacement of Soft Seat

1. The soft seat insert is captured between the upper sur­face of the seat ring and the lower surface of the cage.
No special parts or tools are required.

3.8 Plug/Stem Disassembly

1. Using a drift punch, drive out the pin, a drill bit some­what smaller than the pin should be used to remove
the remainder of the pin.

2. Unscrew the plug from the stem.

3.9 Packing Box

Packing box maintenance is one of the principle chores of
routine servicing. Tightness of the packing is maintained
by packing compression. Compression is achieved by
evenly tightening the packing flange nuts against the
packing flange. Care must be taken not to over tighten as
this could prevent smooth operation of the valve. If all
compression is used up and the valve leaks,new packing is
required.

Packing box maintenance may be performed as a part of
major disassembly and repair or as a separate routine with
the valve installed in the process line.In either case the fol­lowing steps should be closely adhered to, otherwise seri­ous injury or equipment damage could result.

CAUTION: Valve must be isolated and the pressure vent­ed before performing packing box maintenance.

1. Loosen and remove packing flange nuts.

2. Raise packing flange and packing follower up the valve
stem.

NO

TE: If the new packing rings are solid endless rings (i.e.:

PTFE V-ring, grafoil, etc.), the actuator stem coupling will
have to be disconnected. Refer to the actuator removal
section of these instructions for details of coupling

5

Figure 2 Lapping Process

removal. If the coupling is to be removed, the packing box
flange and follower can be removed completely.

3. Using a narrow hook or bent wire, pull the old packing
rings and lantern ring or spring out of the packing box.

CAUTION: WHEN REMOVING PACKING RINGS FROM THE
PACKING BOX, USE A HOOK, BENT WIRE, OR TOOL MADE
FROM A MATERIAL THAT IS SOFTER THAN THE BONNET
MATERIAL. THIS WILL PREVENT SCRATCHING OR MAR­RING OF THE PACKING BOX SURFACES.

4. Replace packing referring to Figures 4–8 for correct
amount of packing and the correct sequence of instal­lation.

NOTE: A thin film of silicone lubricant will ease assembly.
CAUTION: AVOID DAMAGE TO PACKING RING WHEN

SLIPPING THEM OVER THE STEM THREADS.

5. Slide the packing follower over the stem.

6. Place the packing flange, flat side up,over the stem and
flange studs to rest on the packing follower.

7. Screw the packing flange nuts onto the studs and
tighten them evenly to avoid cocking the flange.

NO

TE: Finger tightening of the packing flange nuts should

provide ample sealing pressure to the packing rings.When
the valve is placed in service this adjustment should be
checked, and the nuts tightened just enough to prevent
any leakage. Excessive tightening will bind the valve stem
and prevent sensitive response.

NOTE: For PTFE V-rings spring loaded, tighten the packing
flange nuts evenly until the packing follower shoulder con­tacts the top of the bonnet, Figure 4. No further packing
adjustment is required because packing spring compression
maintains the proper sealing pressure on the chevron rings.

8. In some applications, packing boxes are designed for
use with a lubricator.The lubricator is provided with a
ball check valve to prevent back flow of the process
fluid. On some valves, an isolating valve is added for
positive protection against back flow. The lubricator
should be kept filled with the specified lubricant and
turned in firmly but not tightly.One or two turns of the
lubricator once every two weeks should suffice to pro­vide the desired seal.

3.10 Bellows Sealed Valves

CAUTION: THE TOP OF THE BELLOWS IS WELDED TO THE
STEM AND THE BOT TOM OF THE BELLOWS IS WELDED TO
THE BELLOWS FLANGE. ANY TWISTING OF THESE TWO
PARTS WILL RESULT IN DAMAGE TO THE BELLOWS.

1. Disassembly of a bellows sealed valve follows the same
procedure as Valve Body Disassembly on page 2.

2. Damaged bellows assemblies are replaced as a com­plete unit.

3. If plug removal becomes necessary,carefully inspect the
portion of the plug shank that can be seen below the
guide bushing. If the pin can not be seen, the bellows
assembly must be held in a vice and the stem moved
downward slightly until the pinned connection is visible.

CAUTION: IN THE RELAXED CONDITION THE BELLOWS
WILL BE AT MID TRAVEL.THE STEM MAY ONLY BE MOVED
DOWNWARD 1/2 OF THE VALVE TRAVEL LISTED IN TABLE 2.

4. If lapping of the plug and seat ring is required, the seat
ring must be removed from the body and hand lapped
to the plug/bellows assembly.

5. Reassembly of a bellows sealed valve follows the same
procedure as Valve Body Assembly.

4 VALVE BODY ASSEMBLY

After completion of the required maintenance the valve
should be reassembled using the following procedures:

4.1 Plug/Stem Assembly

1. Screw the stem solidly into the plug.

2. Place the plug shank on a V-block and using a suitable
size drill-bit, drill the stem using the hole in the plug as
a guide.

3. Remove any burrs from the plug guide by making a
slight counterbore.

4. Select the correct size pin, apply a small amount of
grease on it and press into the hole.

NOTE: The pin must be recessed approximately 1/16"
below the plug guide surface.

5. After the plug has been pinned, it should be placed in a
lathe to insure it is running "true." If it is not, strike the
plug with a soft-faced mallet to straighten.

4.2 Body Assembly

1. Clean gasket surfaces. Place gasket on gasket surface
on body bridge. Insert seat ring and cage into body.

2. Lower the plug and stem assembly into the body.

3. Place new bonnet gaskets on the body, and lower the
bonnet carefully over the plug stem and body studs to
its place on the body.

NO

TE: The bonnet must be positioned so the packing

flange studs are at a right angle to the flow center line.

4. Install the stud nuts and tighten them evenly to finger
tight only.

5. Insert packing.

NO

TE: Refer to Figures 4–8 to determine correct amount of

packing to install.

6. Slip the packing follower over the stem to rest on the
packing and check to see that it enters the packing box
at least 1/8".

7. Place the packing flange flat up over the stem and
flange studs to rest on the packing follower.

8. Screw the packing flange nuts onto the studs and
tighten them evenly to avoid cocking the flange.Finger
tightening is sufficient.

9. Using the stem, move the valve plug up and down
through the rated travel.

NOTE: If there is any evidence of binding, loosen the body
stud nuts and reposition the bonnet until the binding dis­appears.

10. Tighten the body stud nuts to the proper torque listed
in Table 2 using the tightening sequence in Figure 9.

NOTE: Tighten in 1/3 increments stopping after each

6

sequence to check for binding as described in step 9
above.

5 ACTUATOR MOUNTING AND

ADJUSTMENT

5.1 General

The following instructions are for the traditional D/R series
spring /diaphragm actuator. Instructions for other actua­tors can be obtained from your local representative.

5.2 Actuator Mounting

1. Lower the actuator over the plug stem and packing
flange to seat squarely on the bonnet shoulder.

2. Rotate the actuator to a convenient position, then
screw the clamp nut onto the valve bonnet threads and
tighten it securely.

3. Connect a regulated air supply to the actuator
diaphragm connection. The supply should be at least 5
psig greater than the pressure needed to stroke the
actuator.

4. The actuator must be in the down position on the
down travel stop.

NO

TE: For "R" series actuators,the spring will maintain the

actuator on the down travel stop and no air pressure is
required.For "D" series actuators,regulate the supply pres­sure to the actuator to move the actuator stem downward
until the downward motion is the same as the travel listed
in Table 2.

5. The valve plug must be on its seat while the actuator
stem is being connected.

6. Press half of the actuator coupling against the actuator
stem and valve plug stem so that each stem is engaged
in the coupling half at least one stem diameter.

NO

TE: It may be necessary to move the valve plug off its

seat a slight distance in order to mesh the valve plug stem
threads with the coupling threads.

7. Apply the other half of the coupling, carefully engaging
threads,then insert the coupling cap screw and tighten
it by hand (Refer to Figure 1).

5.3 Establishing Seat Load

1. Maintain the actuator stem at its lowest position of
travel.

2. If the plug moved off the seat during the stem connec­tion procedure, prevent the stem coupling from rotat­ing, and unscrew the valve plug stem out of the cou­pling until the plug is seated.

CAUTION: UNSCREW THE PLUG STEM UNTIL THE SEAT IS
CONTACTED. DO NOT CONTINUE TO UNSCREW. ROTAT­ING THE VALVE PLUG WHILE IN CONTACT WITH THE SEAT
RING CAN CAUSE DISTRUCTION OF THE SEAT AND
GALLING.

3. Move the plug off the seat by adding air supply to the
"R" series actuator or decreasing air supply to the "D"
series actuator. Unscrew the valve plug stem an addi­tional one-half turn out of the actuator coupling to
ensure positive seating.

4. Tighten the connector cap screws securely.

5. Seat the valve plug firmly by means of the actuator.

IMPORTANT NOTICE

If these steps have been performed correctly the valve
plug is on the seat ring, the actuator has been raised
upward off its down travel stop, the actuator thrust is
applied to the valve trim, and valve leakage will be within
acceptable limits. If maintenance work has been per­formed and seat leakage is exceptionally high, these steps
should be repeated in order to ensure that adequate seat
load has been established.

5.4 Valve/Actuator/Travel

1. Adjust the travel indicator scale on the actuator yoke
leg so that the "Shut" mark is opposite the travel indi­cator on the actuator stem coupling.

2. Stroke the valve/actuator combination by regulating
the air supply to the diaphragm case.Note the travel on
the indicator scale.

3. The actual travel should agree with the travels listed in
Table 2.

NOTE: If the actual travel is less than the travel listed in
Table 2,the actuator coupling should be removed and the
steps in the previous sections repeated.

5.5 Actuator Bench Set and Span

1. The actuator bench set (spring preload) is stamped on
the actuator identification tag located on the actuator
leg.

2. Using a regulated air supply with a gage connected
between the regulator and the diaphragm case, stroke
the valve actuator combination.

3. Record the actuator air pressure at the actuator full up
and full down position.This is the bench set and should
agree with the bench set stamped on the identification
tag.

4. If the actual bench set does not agree with the identifi­cation tag, the bench set can be adjusted by rotating
the actuator spring adjuster.

5. The actuator spring span is the arithmetic difference
between the bench set upper limit and lower limit.

7

8

Figure 3 Parts Identification

Soft Seat Construction

ITEM DESCRIPTION ITEM DESCRIPTION

Body

1

Bonnet

2

Gasket, Bonnet

4

Gasket, Lower Cage

4B*

Gasket, BNT, Backup

4G*

Gasket, Lower Cage

4J*

Ring, Seat

5*

Plug

6*

Stem

8*

Stud

9

Nut

10

Packing

12*

1-1/2”–6” Series G110

ANSI Class 125, 150, 250, 300, 600

Cage Trim Globe and Angle Valves

PA RT S L IS T

12D

Washer
Ring, Lantern

13

Follower, Packing

14

Flange, Packing

15*

Pin

19

Felt Wiper

22

Stud

23

Nut

24

Nut, Clamp

25

Cage

32

Backup Ring

33

Omniseal

34

* Recommended Spare Parts

9

10

Figure 9 Bolt Tightening Sequence

11

Notes

12

Metso Automation, Field Systems Division

Europe, Levytie 6, P.O.Box 310, 00811 Helsinki,Finland. Tel. int [phone]. Fax int.+358 20 483 151

Europe (UK), 2 Lindenwood, Crockford Lane; Chineham Business Park, Chineham, Basingstoke,Hampshire RG24 8QY UK.

Tel.int [phone]. Fax int. [phone]

North America, Corporate Offices: 44 Bearfoot Road, Northborough,Massachusetts 01545-8044, USA. Operational Facilities: 44 Bowditch Drive,P.O.

Box 8044, Shrewsbury, Massachusetts, 01545-8044 USA. Tel. int. [phone]. Fax int. [phone]

North America, 3100 Medlock Bridge Road,Suite 250, Norcross, GA 30071, USA. Tel. int. [phone]. Fax int. [phone]

Latin America, Av. Central, 181- Cháracas Reunidas, 12238-430, São Jose dos Campos. Tel. int. [phone]. Fax int. [phone]

Asia Pacific, 501 Orchard Road, #05-09 Wheelock Place,238880 Singapore. Tel int. [phone]. Fax int. [phone]

www.jamesbury.com • www.metsoautomation.com

Subject to change without notice

Notes