Azbil AMT User manual

Control Valves
Model: AMT
User’s Manual
CM2-AMT100-2001
AMT000001000P

Copyright, Notices and Trademarks
While this information is presented in good faith and believed to
be accurate, Azbil Corporation disclaims the implied warranties of
merchantability and fitness for a particular purpose and makes no
express warranties except as may be stated in its written agree-
ment with and for its customer.
In no event is Azbil Corporation liable to anyone for any indirect,
special or consequential damages. This information and speci-
fications in this document are subject to change without notice.
© 2001-2023 Azbil Corporation. All Rights Reserved.

Table of Contents
1. GENERAL..............................................................................................1
1.1 Scope ................................................................................................................................1
1.2 Major Components of Control Valves .............................................................................1
1.3 Structures..........................................................................................................................2
1.4 Nameplate.........................................................................................................................4
2. INSTALLATION .....................................................................................5
2.1 Maximum Lifting Loads of Eyebolts ...............................................................................5
2.2 Installing Valve in Process Pipe.......................................................................................5
2.3 Item to be Checked After Installation and Before Starting Operation.............................6
3. INSPECTION AND MAINTENANCE .....................................................8
4. DISASSEMBLY AND ASSEMBLY........................................................9
4.1 Detaching Actuator from Valve Body .............................................................................9
4.2 Disassembly and Assembly of Valve Body .....................................................................9
4.3 Disassembly and Assembly of Actuator ........................................................................16
4.4 Disassembly and assembly of model PSA 1 ..................................................................18
4.5 Disassembly and Assembly of Model HA2, HA3, or HA4 Actuator ............................24
5. ADJUSTMENT AND CALIBRATION ..................................................30
6. DIRECT/REVERSE ACTION TYPE CONVERSION AND SPRING
RANGE CHANGE OF ACTUATOR .....................................................33
6.1 Direct/Reverse Action Change.......................................................................................33
6.2 Stroke And Range Spring Change .................................................................................35
7. INSTRUCTIONS FOR TOP HANDWHEEL OF ACTUATOR..............37
7.1 Model PSA1 Actuator ....................................................................................................37
7.2 Model HA2, HA3, or HA4 Actuator..............................................................................41
8. INSTRUCTIONS FOR SIDE HANDWHEEL OF ACTUATOR.............48
8.1 Installation Procedure.....................................................................................................48
8.2 Operating Instructions ....................................................................................................48
8.3 Disassembly of Side Assembly of Side Handwheel ......................................................49
9. Mechanical stopper............................................................................51
9.1 Adjustment of MIN. stopper ..........................................................................................51
9.2 Adjustment of MAX. stopper.........................................................................................51
9.3 Adjustment of dual MIN. MAX. stopper .......................................................................52
10. TROUBLESHOOTING.......................................................................53
11. RECOMMENDED SPARE PARTS....................................................55

Azbil Corporation
Model: AMT, HDT - CV3000 Series Control Valves 1
1. GENERAL
1.1 Scope
This manual covers the instructions for the Three-way Control Valves.
Model AMT Mixing Valves and Model HDT Diverting Valves.
For the valve positioners, refer the following operators manuals.
• Model VPE OM2-8310-0410 Pneumatic valve positioner for small actuators
• Model HTP OM2-83 10-0200 Pneumatic valve positioner (Single Acting type)
• Model HEP 15, l6, l7 OM2-8313-0100 Electro-Pneumatic Valve Positioner
(Single Acting Type)
• Model AVP 300/301/302/200/201/202
CM2-AVP300-2001 Smart valve positioner
• Model AVP 303/203 CM2-AVP303-2001 Smart valve positioner
1.2 Major Components of Control Valves
Each control valve is comprised of two major components, namely, a valve body
and an actuator. Various combinations of valve body and actuator are available
to meet various type of uses with different valve sizes, pressure ratings, types of
connections, types of materials, and actuator sizes.
(For details of specifications, refer to Specification Sheets SS2-8113-4100.)

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Model: AMT, HDT - CV3000 Series Control Valves
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1.3 Structures
The structures of typical CV3000 Series control valves are shown is Fig. 1-1 and 1-2.
The valve body is connected to the bonnet with stud bolts and nuts. Gaskets are
provided at the connection section to seal against the internal fluid or to let the valve
body make up a pressure vessel. The valve plug is supported by the guide ring and
cage, and driven by the actuator. The actuator has multiple springs and a diaphragm,
and converts the pneumatic control signal into a mechanical (positional) control
signal with which to position the valve plug.
In the illustrations, for mixing service, the left and bottom ports are inlets and the
right port is outlet. For diverting service, the right port is inlet.
1” Size Valve Body
1-1/2” and 2” Size Valve Body Valve Body 2-1/2” or More
No. Parts Name
1 Valve Stem
2 Stud Bolt
3 Nut
4 Packing Flange
5 Yoke Lock Nut
6 Bonnet
7 Stud Bolt
8 Nut
9 Lubricator
10 Lantern Ring
11 Packing
12 Valve Body
13 Nut
14 Stud Bolt
15 Tail Piece
16 Packing Follower
17 V-Packing Holder
18 V-PTFE Packing
19 V-Packing Retainer
20 V-Packing Spring
21 Blind Plug
22 Packing Ring
23 Gasket
24 Pin
25 Guide Bushing
26 Seat Ring
27 Valve Plug
28 Gasket
29 Seating Guide
30 Guide Ring
Fig. 1-1 Mixing Type Three-way Valve (AMT)

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Model: AMT, HDT - CV3000 Series Control Valves 3
No. Parts Name
1 Valve Stem
2 Stud Bolt
3 Nut
4 Packing Flange
5 Yoke Lock Nut
6 Bonnet
7 Stud Bolt
8 Nut
9 Lubricator
10 Lantern Ring
11 Packing
12 Valve Body
13 Nut
14 Stud Bolt
15 Tail Piece
16 Packing Follower
17 V-Packing Holder
18 V-PTFE Packing
19 V-Packing Retainer
20 V-Packing Spring
21 Blind Plug
22 Packing Ring
23 Gasket
24 Pin
25 Guide Bushing
26 Seat Ring
27 Valve Plug A
28 Gasket
29 Seating Guide
30 Guide Ring
31 Valve Plug B
32 Key
33 Lock
34 Nut
Fig. 1-2 Diverting Type Three-way Valve (HDT)

Azbil Corporation
Model: AMT, HDT - CV3000 Series Control Valves
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1.4 Nameplate
A nameplate as shown in Fig. 1-3 is posted on each control valve. The nameplate
indicates the model number, valve size, pressure rating, trim material, date of
manufacture and other major specifications of the control valve. Before installing
the control valve, make sure that the specifications indicated on the nameplate
conform with the conditions of use. The nameplate indicate also the product number
(PROD.NO.) of the control valve. Please mention this number also when consulting
your Azbil Corporation agent for replacement of parts or other modification of the
control valve.
Fig. 1-3 Nameplate
Compliance with Regulations
This product complies with the directive below.
• Pressure Equipment Directive (PED) 2014/63/EU
Requirements for workers (installation, operation, maintenance)
To ensure safety, only specialists who are skilled in instrumentation work should
carry out the installation, operation, and maintenance of this device.

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Model: AMT, HDT - CV3000 Series Control Valves 5
2. INSTALLATION
2.1 Maximum Lifting Loads of Eyebolts
The diaphragm case has a pair of lifting eyebolts. These eyebolts primarily are for
lifting the actuator alone. When using the eyebolts for other purposes (such as lifting
an actuator bed to its valve body or other components), note that the allowable
maximum lifting loads of the eyebolts are as shown in the following table.
Table 2-1 Maximum Lifting Loads of Eyebolts
Actuator Model No.
Allowable Maximum
Lifting Load of Eyebolts
Weight of
Actuator Alone
PSA1 160kg 8kg
HA2 160kg 16kg
HA3 160kg 32kg
HA4 220kg 68kg
Note: The eyebolts may be used to lift the actuator together with its valve buy
(cast globe valve) of up to pressure rating “Class 600”. When doing this, be
extremely careful so that no shock or other abnormal force is applied to the
actuator or the valve body.
2.2 Installing Valve in Process Pipe
(1) Before installing the valve in the process pipe, remove foreign matter (such
as scales and welding chips) from both upstream and downstream sides of the
process pipe.
(2) Confirm that the direction of process fluid flow conforms with that of the
arrowhead mark provided on the valve body.
(3) Pay attention so that the pipe connection gaskets do not extrude into the process
pipe inside. Be sure to use gaskets made of material which is suitable for the
process fluid. The welding type of valve employ no gaskets.
(4) Pay attention so that no excessively large stress is conveyed from the process
pipe to the valve body. Uniformly tighten the bolts of the process pipe
connection flange. The high pressure type of valves have no flanges, since they
are connected to the process by welding.
(5) Before connecting the air pipes to the actuator and positioner, blow the pipes to
clean them.
(6) Do not install any heating or cooling provisions on the bonnet.

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Model: AMT, HDT - CV3000 Series Control Valves
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2.3 Item to be Checked After Installation and Before Starting Operation
(1) Check that there is no leak from air piping.
(2) Check that the bolts and nuts of the diaphragm case are not loose. Standard
tightening torques are as follows:
For HA2, HA3 (M8) : 12 N.m {120 kg-cm}
For HA4 (M12) : 42 N.m {420 kg-cm}
(3) Tighten the packing flange nuts to prevent leak from the gland packing section.
Standard tightening torques are as shown in Table 2-2.
Table 2-2 Tightening Torques of Packing Flange Nuts
Valve Stem
Diameter
(mm)
Graphite Packing
(N.m {kgf-cm})
Metallic Filament Reinforced
Graphite Packing
(N.m {kgf-cm})
V PTFE Packing
(N.m {kgf-cm})
10 3 {30} 7 {70}
0.8 {8}
13 5 {50} 12 {120}
16 8 {80} 18 {180}
20 10 {100} 25 {250}
25 15 {150} 40 {400}
30 20 {200} 50 {500}
Note: The tightening torques mentioned in the above are only to give you reference
values. Note that tightening torques may vary depending on the type of
packing.
Graphite Yarn packing
Fig. 2-1 Gland Section
(4) If the valve is provided with a lubricator as shown in Fig. 2-2, check whether
the bonnet section has been lubricated or not. To do this, loosen the lubricator
handwheel and turn the squeeze screw. If the squeeze screw turn lightly, and
grease in the lubricating procedure mentioned below. (If the squeeze screw turns
heavily, this means that grease has been applied.)

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Model: AMT, HDT - CV3000 Series Control Valves 7
Fig. 2-2 Lubricator(Class 600 or under)
Lubricating Procedure
(a) prepare grease of the type indicated on the nameplate.
(b) Tightly close the lubricator handwheel.
(c) Remove the squeeze screw, apply grease, and set the squeeze screw.
(d) Loosen the lubricator handwheel and drive grease by turning the squeeze screw.
(e) Repeat the procedure of (b), (c) and (d) until turning of the squeeze screw
becomes heavier. Tightly close lubricator handwheel.
(5) When raising temperature of a valve which is used for high temperature service,
raise temperature gradually (standard rate is 100 per hour) and do not operate
the valve when its temperature is being raised.

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Model: AMT, HDT - CV3000 Series Control Valves
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3. INSPECTION AND MAINTENANCE
Inspect and service the actuator as follows:
(1) Tightening the gland:
Tighten the gland once in every 6 months or thereabout.
The tightening procedure is as given in Section 2-3-(3).
(2) Lubricating the gland:
Lubricating the gland once in every 6 months or thereabout.
The lubricating procedure is as given in Section 2-3-(4).
(3) Check for hunting of valve Position:
Refer to Section 10 “TROUBLESHOOTING.”
(4) Check for abnormal noise and vibration:
Refer to Section 10 “TROUBLESHOOTING.”

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Model: AMT, HDT - CV3000 Series Control Valves 9
4. DISASSEMBLY AND ASSEMBLY
This section covers the disassembly and assembly procedures of the actuator for its
overhaul or modification.
4.1 Detaching Actuator from Valve Body
See Fig. 4-5.
(1) Apply to the actuator an air pressure so that the valve position pointer is at a
point of 10% - 20% above the fully closed point.
(2) Loosen the clamping-bolts of the stem connector, remove the stem connector,
and detach the actuator stem from the valve stem.
(3) Remove the clamping-nut of the yoke.
(4) Raise the actuator to detach it from the valve body.
Precautions: For detaching the actuator from the valve body which is kept installed
in the process pipe, be sure to shut down the process for and release the
process pressure before detaching the actuator.
4.2 Disassembly and Assembly of Valve Body
To disassemble or assemble the valve body, refer to Fig. 4-1 through 4-4 and
proceed as described below.
Disassembly Procedure
• AMT (Mixing) Type (Refer to Fig.4-1, 4-2, 4-3)
(1) Apply an air pressure to the diaphragm so that the pointer indicates slightly
below the position AB-B for direct acting actuator provided or indicates slightly
above the position AB-A for reverse acting actuator and hold it in either case so
that the valve plug does not touch the seat ring.
(2) Remove the stem connector to separate the actuator stem from the valve stem.
(3) Release an air pressure from the diaphragm and disconnect the air piping.
(4) Remove the yoke nut by turning it with a chisel and detach (pull up) the actuator
from the valve body.
(5) Remove the tail piece from the valve body by loosening the bottom nuts on the
body.
(6) Pull down the seating guide from the valve body. However, for 1” valve,
unscrew and remove the seat ring from the tail piece as required.
(7) Loosen the gland packing flange nuts and remove the valve plug from the
bottom of the valve body.
(8) Remove the bonnet assembling nuts and pull out the bonnet.
(9) To remove the seat ring, use the “special tool* for mounting and removing the
seat ring.”
*: Separately ordered.

Azbil Corporation
Model: AMT, HDT - CV3000 Series Control Valves
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• HDT (Diverting) Type (Refer to Fig.4-4)
(1) Apply an air pressure to the diaphragm so that the pointer indicates slightly
below the position AB-A for direct acting actuator provided or indicates slightly
above the position AB-B for reverse acting actuator and hold it in either case so
that the valve plug do not touch the seat ring.
(2) Remove the stem connector to separate the actuator stem from the valve stem.
(3) Release an air pressure from the diaphragm and disconnect the air piping.
(4) Remove the yoke nut by turning it with a chisel and detach (pull up) the actuator
from the valve body.
(5) Remove the tail piece from the valve body by loosening the bottom nuts on the
body. When doing this, be careful not to drop the seating guide lest the seating
surface of valve plug B should be damaged.
(6) Remove the bottom nut on the valve plug and pull the valve plug downward.
Then pull down the seating guide.
(7) Remove the bonnet mounting nuts and pull out the bonnet by loosening the
gland packing flange nuts.
(8) Pull upward the valve plug A and the guide ring.
(9) To remove the seat ring, use the “special tool* for mounting and removing the
seat ring.”
*: Separately ordered.
Inspection
Inspect the disassembled parts for damage. If any damage is found, replace the parts.
(When ordering parts, mention also the Prod. No. of the valve which is indicated on
the nameplate.)
(1) Do not re-use the removed gland packing. Use fresh packing when assembling
the valve. (When assembling, a vacuum service valve, pay special attention to
the packing assembly method.)
(2) Check that the seating surfaces of plug, seat ring and cage are not damaged.
(3) Check that the gasket-contacting surfaces of valve body, bonnet and guide ring
cage are not damaged. Do not re-use the removed gasket. Use fresh gasket when
assembling the valve.
(4) Check that the plug guide section, the stem, and the guiding sections of guide
bushing, seat ring and seating guide are not damaged.
Assembly Procedure
• AMT (Diverting) Type (Refer to Figs. 4-1, 4-2, 4-3)
To assemble the valve, follow the disassembly procedure in the reverse order.
(1) To mount the seat ring, use the “special tool for mounting and removing the seat
ring.” (The tool is optional.)
For the tightening torques, see Table 4-1.
(2) Insert the valve plug (with valve stem mounted) from the tail piece side.
(3) Mount the seating guide and two gasket (one for 1” valve). (For 1” valve, seat
ring should be inserted in the tail piece in advance.)

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(4) Mount the guide ring and two gaskets (since 1” valve has the guide mounted in
the bonnet and 1 1/2” and 2” valve in the valve body, only one gasket is used)
from the top of the valve body and install the bonnet.
For assembling the tail piece and the bonnet with nuts, first tighten all nuts
lightly with a and further, gradually tighten them with a wrench evenly not to
cause uneven tightness.
(5) Insert the gland packing into the gland. (See Fig. 2-1.)
Note: When installing yarn packings, stack them sheet by sheet with the cut
sections of the mutally adjoining sheets making up the right angle (90
degrees).
(6) Install the packing follower and packing flange, and tighten the nut. For the
tightening torque, see Table 2-2.
• HDT (Diverting) Type (Refer to Fig.4-4.)
To assemble the valve, follow the disassembly procedure in the reverse order.
(1) To mount the seat ring, use the “special tool for mounting and removing the seat
ring.” For the tightening torques, see Table 4-1.
(2) Insert the valve plug A (with valve stem mounted) from the top of the bonnet.
(3) Insert the gasket and seating guide from the tail piece side and, then,fasten the
valve pulg B with the lock nut.
(4) Insert the gasket and assemble the tail piece.
(5) Mount the guide ring and two gaskets from the top of the valve body and
assemble the bonnet.
For assembling the tail piece and the bonnet with nuts, first tighten all nuts
lightly with a and further, gradually tighten them with a wrench evenly not to
cause uneven tightness. For the tightening torque, see Table 4-2.
(6) Insert the gland packing into the gland. (See Fig. 2-1.)
Note: When installing yarn packings, stack them sheet by sheet with the cut
sections of the mutally adjoining sheets making up the right angle (90
degrees).
(7) Install the packing follower and packing flange, and tighten the nut. For the
tightening torque, see Table 2-2.
Bolt Torque
(N.m{kgf-cm})
M12 60 {600}
M16 100 {1,000}
M20 150 {1,500}
Size (in.) Torque
(N.m{kgf-cm})
M22 200 {2,000}
M24 250 {2,500}
1 180 {1,800} M27 350 {3,500}
1-1/2 260 {2,600} M30 500 {5,000}
2 390 {3,900} M33 660 {6,600}
2-1/2 520 {5,200} M36 850 {8,500}
3 650 {6,500} M39 1,000{10,000}
4 800 {8,000} M42 1,200 {12,000}
5 1,000 {10,000} M45 1,400 {14,000}
Table 4-1 Seat Ring Tightening Torques Table 4-2 Tightening Torque of
Bonnet Stud Bolts

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Model: AMT, HDT - CV3000 Series Control Valves
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Fig. 4-1 Model AMT 1”

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Fig. 4-2 Model AMT 1 1/2”, 2”

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Fig. 4-3 Model AMT 2 1/2” - 6”

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Fig. 4-4 Model HDT

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4.3 Disassembly and Assembly of Actuator
Normally the actuator requires no adjustment. However, it should be disassembled
and assembled when installing it on a valve body, when modifying its specifications,
or when replacing damaged parts. The disassembly and assembly procedure of the
actuator for such purposes are covered in Sections 4-4 and 4-5.
To disassemble the actuator, refer to fig.4-11 and Fig.4-19.
Fig. 4-5
When disassembling or assembling the actuator, keep it in the vertical attitude. For
the tightening torques of bolts and nuts, see Tables 4-5.
For the names of the parts, see Figs.4-11 and 4-19.