Emerson Fisher D4 User manual

www.Fisher.com
Fisher™D4 Control Valve with Gen 2 easy-Drive™
Electric Actuator
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 3.................................
Specifications 3...............................
Educational Services 3.........................
Installation 4..................................
Special Instructions for “Safe Use” and Installations
in Hazardous Locations 5.....................
Startup Overview 6............................
Default Input Signals 11........................
Configuration 11..............................
Input Configuration 11.....................
Changing the Inputs from Default Settings 11..
Modbus Setup 11.............................
Connecting using the Fisher easy-Drive
configuration software 12................
Initial Setup 12............................
Calibration Instructions 13..................
Licensing 16..............................
Startup 18................................
Troubleshooting 19.............................
Maintenance 20................................
Valve Plug and Seat Ring 20.....................
Valve Packing 22..............................
Parts Ordering 25...............................
Parts Kits 25...................................
Figure 1. Fisher D4 Control Valve with Gen 2
easy-Drive Electric Actuator
W9933-5
Repair Kits 25..................................
Parts List 26...................................
Appendix A - Modbus 29.........................
Appendix B - Certificate of Conformance 34.........
Introduction
Scope of Manual
This instruction manual provides installation, maintenance, and parts information for the Fisher D4 control valve with
Gen 2 easy-Drive electric actuator. For Gen 1 electric actuators, use Fisher D4 with easy-Drive Instruction Manual,
(D103597X012). If the actuator has a RPU-100 installed refer to easy-Drive RPU-100 Instruction Manual,
(D104551X012).
Do not install, operate, or maintain a D4 control valve with Gen 2 easy-Drive electric actuator without
being fully trained and qualified in valve, actuator, and accessory installation, operation, and
maintenance. To avoid personal injury or property damage, it is important to carefully read, understand,
and follow all the contents of this manual, including all safety cautions and warnings. If you have any
questions about these instructions, contact your Emerson sales office before proceeding.
Instruction Manual
D104188X012
D4 Valve with Gen 2 easy-Drive Actuator
February 2021

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D4 Valve with Gen 2 easy-Drive Actuator
February 2021
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Table 1. Specifications
Valve Body Sizes and End Connection Styles(1)
See table 2
Maximum Inlet Pressures and Temperatures(1)
If the valve nameplate shows an ASME
pressure‐temperature class, maximum inlet pressure
and temperature is consistent with the applicable
class per ASME B16.34. If the nameplate does not
show an ASME class, it will show a maximum cold
working pressure at 38_C (100_F) (for example, 293
bar [4250 psi])
Maximum Pressure Drops(1)
See table 4
Shutoff Classification per ANSI/FCI 70‐2
and IEC 60534‐4
Class IV
Material Temperature Capabilities(1)
Valve Body Assembly:
Standard Bonnet O‐Ring: -40 to 135°C (-40 to 275°F)
Optional Fluorocarbon Bonnet O‐Ring: -23 to 204°C
(-10 to 400°F)
Flow Characteristic
Equal percentage
Flow Direction
Flow up only
Port Diameters
See table 2
Valve Plug Travel
19 mm (0.75 inch)
Valve Plug Style
Micro‐Form valve plug
Available Actuator Configurations
On/off (snap acting)
Positioning (flow or pressure control)
Power Requirements
9-30VDC, minimum 4 amp power supply required
(fuse to 5 amps)
Maximum Current Draw
4 amps
Idle Current Draw
15 mA at 24VDC, 25 mA at 12VDC
Conduit Connections
Two 3/4 NPT connections
Stroke Length
19 mm (0.75 inch)
Nominal Stroke Speed(2)
3.9 mm/s (0.15 inch/s) at 24 VDC
2.2 mm/s (0.09 inch/s) at 12 VDC
Hazardous Area Approvals
CSA (C/US): ExplosionProof Class I, Division 1,
Groups C and D, T6, Ex d IIA T6, Class I, Zone 1, AEx d
IIA T6
ATEX Flameproof - Gas:
II 2 G, Ex db IIA T6
IECEx Flameproof - Gas: Ex db IIA T6
Enclosure Rating
Type 4X and IP66
Duty Cycle
50% maximum
Enclosure Material
Cast aluminum alloy with powder coat paint
Approximate Weight:
22 - 51 kg (49 - 113 lbs), depending upon
construction
1. The pressure or temperature limits in the referenced tables and any applicable ASME code limitations should not be exceeded.
2. 10% variation can be expected, based on temperature and pressure of application.

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Description
The D4 control valve with easy-Drive electric actuator is a compact, rugged valve designed primarily for high‐pressure
throttling applications. This valve is ideal for use on pressure and flow control applications within the oil and gas
production industry. The D4 valve also makes an excellent dump valve for high‐pressure separators and scrubbers.
The D4 control valve meets the metallurgical requirements of NACE MR0175/ISO 15156 without environmental limits
for temperatures below 135_C (275_F). If the temperature is above 135_C (275_F), the N07718 Belleville washers will
impose some limits, as shown in table 3.
Specifications
Table 1 lists specifications for the D4 control valve with easy-Drive electric actuator. Some of the specifications for a
given control valve as it originally comes from the factory are stamped on a nameplate located on the lower actuator
enclosure.
Educational Services
For information on available courses for the Fisher D4 control valve with easy-Drive electric actuator, as well as a
variety of other products, contact:
Emerson Automation Solutions
Educational Services - Registration
Phone: [phone] or 1-800-338-8158
E-mail: [email protected]
emerson.com/fishervalvetraining
Table 2. Valve Sizes and Connection Styles
VALVE
SIZE,
NPS
PORT
DIAMETER,
(INCHES)
SCREWED RAISED FACE (RF) FLANGED RING TYPE JOINT
(RTJ) FLANGED
4250 psi CL150 CL300 CL600 CL900 and
CL1500 CL600 CL900 and CL1500
10.25, 0.375,
0.5, 0.75 X X X X X X X
20.25, 0.375, 0.5
0.75, 1, 1.25 X X X X X X X
X = Available construction.
Table 3. D4 Environmental Limits for NACE MR0175/ISO 15156 with Sour Trim
MAXIMUM TEMPERATURE MAXIMUM H2S PARTIAL PRESSURE COMPATIBLE WITH
ELEMENTAL SULFUR
_C_F MPa psia
232 450 0.2 30 No
204 400 1.4 200 No
199 390 2.3 330 No
191 375 2.5 360 No
149 300 2.8 400 No
135 275 No Limit Yes

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Table 4. Fisher D4 easy-Drive Maximum Pressure Drop
PORT DIAMETER MAXIMUM PRESSURE DROP(1)
mm Inch Bar psi
6.4
9.5
12.7
19.1
25.4
31.8
0.25
0.375
0.5
0.75
1
1.25
293
293
247
105
56
34
4250(1)
4250(1)
3576(1)
1518
814
495
1. Downstream pressure, P2, is limited to 2250 psig.
Installation
WARNING
Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal
injury.
To avoid personal injury or property damage caused by bursting of pressure‐retaining parts or by uncontrolled process
fluid, be certain the service conditions do not exceed the limits shown on the valve nameplate and in table 1. Use
pressure‐relieving devices required by government or accepted industry codes and good engineering practices.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this
instruction manual.
WARNING
For explosionproof applications, ensure the actuator cover is properly bolted before applying power to the actuator.
Personal injury or property damage may result from fire or explosion if power is applied to the actuator with the cover
removed in a hazardous area.
For explosion‐proof applications, install rigid metal conduit and a conduit seal no more than 457 mm (18 inches) from the
actuator. Personal injury or property damage may result from explosion if the seal is not installed.
Select wiring and/or cable glands that are rated for the environment of use (such as hazardous area, ingress protection, and
temperature). Failure to use properly rated wiring and/or cable glands can result in personal injury or property damage
from fire or explosion.
Wiring connections must be in accordance with local, regional, and national codes for any given hazardous area approval.
Failure to follow the local, regional, and national codes could result in personal injury or property damage from fire or
explosion.
CAUTION
When ordered, the valve configuration and construction materials were selected to meet particular pressure, temperature,
pressure drop, and controlled fluid conditions. Responsibility for the safety of process media and compatibility of valve
materials with process media rests solely with the purchaser and end‐user. Since some body/trim material combinations
are limited in their pressure drop and temperature ranges, do not apply any other conditions to the valve without first
contacting your Emerson sales office.
To avoid product damage, inspect the valve before installation for any damage or any foreign material that may have
collected in the valve body. Also remove any pipe scale, welding slag, or other foreign material from the pipeline.

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WARNING
Avoid personal injury or property damage caused by possible actuator failure. The use of a rigidly‐mounted support on the
actuator casing may cause additional stress on the actuator leading to premature wear and/or failure of the actuator
components.
CAUTION
To avoid product damage, inspect the valve before installation for any damage or any foreign material that may have
collected in the valve body. Also remove any pipe scale, welding slag, or other foreign material from the pipeline.
1. Before installing the control valve assembly, inspect it for any damage and for any foreign material that may have
collected in the valve body.
2. Remove any pipe scale, welding slag, and other foreign material from the pipeline.
3. The control valve can be installed in any position, but normally the actuator is vertical above the valve. Install the
valve so the flow direction arrow on the side of the valve indicates the direction of the process flow.
4. Install the valve following local and national piping codes when they apply to the application. For screwed
connections, treat the external pipe threads with a good grade pipe compound. For flanged valves, use suitable
gaskets between valve and pipeline flanges.
5. If continuous operation is required during maintenance and inspection, install a conventional three‐valve bypass
around the valve.
Special Instructions for “Safe Use” and Installations in Hazardous
Locations
ATEX/IECEx
WARNING
To avoid static discharge from the enclosure, do not rub or clean the enclosure with solvents. To do so could result in an
explosion. Clean with a mild detergent and water only.
The enclosure is nonconducting and may generate an ignitioncapable level of electrosatic charges under certain extreme
conditions. The user should ensure that the equipment is not installed in a location where it may be subjected to external
conditions (such as highpressure steam) which might cause a buildup of electrostatic charges on nonconducting surfaces.
Additionally, cleaning of the equipment shall only be done with a damp cloth.
To avoid damage to the enclosure, when screws are fully tightened into blind holes in enclosure walls, with no washer
fitted, at least one full thread shall remain free at the base of the hole.

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Startup Overview
Figure 2. Flowchart
PREPARE PER INSTRUCTIONS
IN INSTALLATION SECTION
POSITIONING OR
ON/OFF?
POSITIONING
ON/OFF
WIRE PER DIAGRAM FOR L2e WIRE PER DIAGRAM FOR 4-20 mA
YES
YES
NO
NO
ARE YOU USING
Modbus?
FIRST TIME USING
Modbus?
CONNECT USB-TO-Modbus CONVERTER
TO INTERNET CONNECTED COMPUTER
CONNECT VIA Modbus TO VALVE AND
MONITOR DESIRED REGISTERS
FOLLOW DRIVER INSTALLATION
INSTRUCTIONS FOR YOUR DEVICE
INSTALL easy-Drive CONFIGURATION OR
Modbus MASTER SOFTWARE
UNIT IS READY FOR OPERATION

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Figure 3. Fisher D4 Valve with Gen 2 easy-Drive Actuator Wiring Diagram
FIELD WIRING CONNECTIONS
MOTOR / GEARBOX ASSY
(GE84238)
CONTROLLER
POWER AND
CONTROL TERMINAL
GE47302-7
TOP VIEW CONTROLLER
Power Requirements
Ensure a stable DC power source is available, maintaining less than 5% ripple and sufficiently surge protected for the
application. A 4 amp (minimum) power supply is required.
Wiring Instructions
1. Observe local wiring requirements for hazardous location usage.
2. Conduit seals within 450 mm (18 inches) of the enclosure port are required for explosionproof installation.
3. 18AWG (0.52mm2) to 12AWG (3.31mm2) wire size required.
4. Fuse system to 5A.
5. Connect enclosure and analog signal shields.
6. Ensure power is turned off before connecting the wires.
Power
1. Connect 12 or 24 VDC reference to: –
2. Connect 12 or 24 VDC positive to: +
3. Be sure to tighten terminals sufficiently to ensure solid mechanical connection.

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Figure 4. Wiring - Analog Input
Figure 5. Wiring - L2e

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Figure 6. Wiring - Single Dry Contact
Figure 7. Wiring - Modbus Input

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Figure 8. Wiring - Auxiliary Digital I/O set to input (40080=0)
Figure 9. Wiring - Auxiliary Digital I/O set to output (40080=1)
10V, 25mA max

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Default Input Signals
The D4 with easyDrive comes from the factory calibrated and ready for use with the following default input signals
shown in table 5.
Table 5. D4 easy-Drive Default Input Signals
CONFIGURATION ON/OFF POSITIONING
Input Signal L2e (dual dry contact) 4-20 mA
If the input signal of the application matches table 5, proceed to the Wiring Instructions section. If the input signal of
the application does not match table 5, proceed to the Configuration section.
Configuration
Input Configuration
There are two functional configurations available for the easyDrive electric actuator: On/Off and Positioning. It is
possible to change an actuator from On/Off to Positioning after it has been delivered from the factory using a
positioning license key. See licensing section.
All available input signals are shown in table 6.
Table 6. All Available Input Signals
CONFIGURATION ON/OFF POSITIONING
Control Source Modbus Local Modbus Local
Input Signal Modbus L2e Dual Dry Contact
(default) Single Dry Contact Modbus 4-20 mA (default)
If you are using the default inputs signals, and the valve has not been disassembled or adjusted in any way, there is no
need to recalibrate the assembly. You can proceed directly to Startup (page 18).
Changing the Inputs from Default Settings
All configuration within the valve is done by setting values in Modbus registers. This can be done using any Modbus
master (flow computer, PLC, PC). Configuration software, providing a visual interface to the registers, is available
through your Emerson sales office or the Fisher website, at www.fisher.com/easyDrive.
Modbus setup
Use of a serial or USB to RS-485 device is required to connect to the actuator. Refer to manufacturer's requirements for
installation. The D4 with easyDrive electric actuator Modbus factory defaults are Address 1, 9600 baud, even parity, 1
stop bit, MSB.
When a connection has been achieved, the actuator may be configured to accept the input signal over the Modbus
link (ignoring the physical inputs) and the Modbus settings may be changed to accommodate the network to which it
is attached. Other changes to functionality are possible, such as:
D Low level cutoff: 40054 (default is 5%)
D Position upon loss of signal: 40053 (default is 0%)
See Appendix A for a full map of Modbus registers and their functions.

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Figure 10. Fisher easy-Drive Configuration Software
Connecting using the Fisher easyDrive configuration software
The Fisher easyDrive configuration software allows configuration and diagnosing of the Fisher easyDrive electric
actuator with a graphical interface. Connect a PC to the actuator using a USB or serial device to Modbus RTU converter
using the wiring instructions above. The USB or serial device will be visible in the drop menu under Serial Port Settings.
Baud rate and parity should be set to the Modbus settings of the actuator. Default actuator settings are address 1,
9600 baud, even parity, 1 stop bit, MSB. Press the AUTO button in the upper left corner to connect to the valve.
Use the Fisher easyDrive configuration software (figure 10) to make the desired changes, or register values may be
changed to allow different functionality.
Note
If an actuator is on/off, a Modbus command of 0499 in register 40001 will cause the valve to close fully, while a value of 5001000
will cause the valve to open fully. The command register has one implied decimal point.
Initial Setup
The control method selection determines what control signal to which the valve will respond. Only the control signal
selected will result in movement of the valve; all others will be ignored. The control methods available are dependent
upon the licensing tier purchased with the valve. The functions for each tier are shown below.
D On/Off Tier

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D Dual Contact On/Off
D Single Contact On/Off
D Modbus On/Off
D Positioning Tier - License required (see Licensing section)
D Dual Contact On/Off
D Single Contact On/Off
D Modbus On/Off
D Modbus Positioning
D 4-20mA Positioning
D 4-20mA Level
When using the easy-Drive Configuration Tool, clicking on the “Control Method” box will create a drop menu as
shown. Select the desired control source; the selection will turn yellow. A box with Pending Changes will appear
showing all changers. Press “APPLY” and the valve will immediately respond to that signal only.
Figure 11.
Calibration Instructions
WARNING
To avoid personal injury or property damage, be aware that the valve will open fully and then close fully during the
calibration cycle.

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If an easy-Drive valve has been shipped from the Fisher factory, it is not necessary to perform a span calibration. If,
however, the valve has a new controller board or maintenance has been performed on the valve, such as trim
replacement, it will be necessary to perform a span calibration. A span calibration is accomplished by the following
method:
1. Ensure the process and valve are in a safe state – the valve may move during this operation
2. Press the CALIBRATE SPAN button to initiate the span calibration. The software will show a progress bar during the
calibration and display Valve Span Calibrated when complete.
Analog Input Calibration
For valves using 4-20mA as a control source, several options are available to customize control of the actuator. Use a
4-20mA signal generator to provide the desired signal. It is possible to calibrate the 4-20mA signal in reverse acting or
split-ranging with the method below with at least 4mA of signal difference between the close and open values. The
example shows a valve being changed from normal to reverse acting during the calibration process.
1. With the Control Method set to 4-20mA Positioning or 4-20mA Level, enter the Calibration screen and the 4-20mA
Signal Calibration window will be visible.
2. Click the CALIBRATE CLOSE & OPEN VALUES button. A separate window will open to guide through the process.
3. Set the 4-20mA signal to the desired value for when the valve is to be closed.
4. Enter this value into the Calibrated mA Signal text box and press Next
Figure 12.
5. Set the 4-20mA signal to the desired value for when the valve is to be open.
6. Enter this value into the Calibrated mA Signal text box and press Next

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Figure 13.
7. If the Close and Open values are as expected, press Confirm to accept these values. If not, press Cancel to restart
the process.
Note
The value of the 4-20mA signal must have at least 4mA difference between the close and open signals. A differential less than
that amount will cause the actuator to reject the calibration and use the previous values.
Should the entered values vary more than 10% from the expected 4-20mA values; the actuator will accept the calibration and a
Notification displaying “Questionable Analog Calibration” will result.
Figure 14.
Calibration with the use of Modbus
1. After the unit has been properly wired and fused per instructions in the Wiring section of this instruction manual,
turn power to the unit on.
2. Calibrate using Modbus:
a. Send position command of 0% to actuator to prevent unexpected motion. Valve will move to commanded
position following the calibration procedure.

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b. Send a value of 1 to register 40043. Valve plug will move to fully open position and then to fully closed. The valve
plug will then return to the commanded position.
If a Modbus connection is not available, and recalibration is desired, use the appropriate calibration method as
determined by the control method of your valve.
Calibration without the use of Modbus
1. Turn power to the actuator off.
2. Wait for 10 seconds to ensure all circuits have discharged.
3. Return power to the actuator and use the appropriate calibration method for your control signal. Calibration
sequence must be done within 15 seconds of power being switched on.
4. For On/Off operation using L2e dualinput dry contact:
a. Close the contact to create a short between pins COMMON and OPEN – valve plug will not move at this time.
b. Close the contact to create a short between pins COMMON and CLOSE – valve plug will move to the upper, open
position and then to the lower, closed position.
5. For On/Off operation using single dry contact:
a. Close the contact to create a short between pins COMMON and OPEN – valve plug will not move at this time.
b. Open the contact to create an open circuit between pins COMMON and OPEN – valve plug will move to the
upper, open position and then to the lower, closed position.
6. For positioning operation using 420mA:
a. Apply a 20mA signal between pins 4-20mA - and 4-20mA + – valve plug will not move at this time.
b. Apply a 4mA signal between pins 4-20mA - and 4-20mA + – valve plug will move to the upper stop, immediately
followed by moving to the lower, closed position.
c. If calibration of the analog input is desired to improve positional accuracy, an optional operation is listed in the
next section titled Analog Input Calibration.
7. The unit is now calibrated.
Licensing
The Gen 2 easy-Drive actuator has two differing modes of operation: On/Off and Positioning. The On/Off mode is
intended for snap-acting applications where the valve is either fully open or fully closed. In this mode, the valve plug
cannot remain at any intermediate position; it will move to a fully closed or fully open position only. For applications
that require the actuator to control over the full range of motion, it is necessary to have a Positioning license installed.
A positioning license will allow access to 4-20mA positioning, 4-20mA level control and Modbus positioning.
Positioning licenses can be purchased with the actuator and installed at the factory or can be installed at a later date by
use of a license key on a USB license dongle. Installation of the license can be completed using the configuration
software.
1. Insert the USB license dongle into the computer connected to the Gen 2 easy-Drive actuator.
Figure 15.

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2. Click the button labelled MANAGE LICENSES on the left side of the configuration software screen.
Figure 16.
3. The license control screen will open, showing all licenses installed on the USB and the actuator.
Figure 17.
4. After verifying the presence of the desired license on the USB license dongle, click the button labelled ‘easy-Drive’
under Move To, and the license will be transferred to the valve as shown below

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Figure 18.
5. It is also possible to transfer licenses from one USB license dongle to another. Place two dongles into the computer
with the configuration software. Type in the number of licenses to move and click USB 2 to move the licenses.
Start Up
WARNING
To avoid personal injury or property damage, be aware that the valve will move and respond to an input signal during start
up.
1. Before turning on power to the unit, be sure that a closed signal is being commanded to the unit.
D DryContact: contact is open.
D L2e (Dual Dry Contact): Contact closed across pins COMMON and CLOSE.
D Analog Input: signal = 4mA.
D Modbus: position demand = 0.
2. Turn on power to the unit.
3. Apply a change in position demand to ensure unit responds properly.
D DryContact:
D Closed contact between pins COMMON and OPEN will open the valve.
D Dual contact / L2e only: Closed contact between pins COMMON and OPEN will open the valve. Closed contact
between pins COMMON and CLOSE will close the valve.
D Analog Input: valve will respond to proportional demand.
D Modbus: valve will respond to positional demand in register 40001. 0 = fully closed and 1000 = fully open.

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4. If the valve does not respond as expected, proceed to Troubleshooting guide on page 19.
5. Check conduit ports.
D Conduit seal must be in place within 450mm (18 inches) of the enclosure.
D Unused conduit ports must be sealed with an explosionproof port plug.
6. Replace the cover and tighten all 8 bolts to 20 Nm (15 ftlbs).
Troubleshooting
1. Unit does not move.
a. Verify that 12VDC to 24VDC is present on the power terminals as shown on the cover. Green heartbeat LED will
pulse near Modbus terminals when power is present.
b. Verify that all wires are firmly attached on both ends.
c. Verify that wires are connected to the correct terminals - see Wiring in the manual.
d. Verify mode of operation (on/off or positioning) matches control signal.
e. Verify mode of control (local or Modbus) matches control signal.
2. Unit does not respond to 420mA signal
a. Verify that 12VDC to 24VDC is present on the power terminals as shown on the cover.
b. Verify that the 420mA signal is wired correctly and that the terminals are firmly on the wires.
c. Verify mode of operation matches control signal (local control: 40067=0, positioning: 40065=1).
d. Check the value of the analog input in register 40026 to determine if it is 0 or greater.
i. If register 40026 shows 0, the 4-20mA may be wired backwards. Swap wire and attempt again.
3. Diagnostics show a Motor Stall Fault.
a. The easyDrive electric actuator is designed to operate in a manner consistent with a pneumatic actuator. This
means that if the valve plug can not move to its commanded position, the actuator will stop, without damage,
and issue a Motor Stall Fault warning. When the command signal changes outside of the deadband (Modbus
register 40036), it will attempt to move again. Recalibrate the actuator span per instructions in the Startup
section of this manual.

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Maintenance
Refer to figure 22.
Valve parts are subject to normal wear and must be inspected and replaced as necessary. The frequency of inspection
and maintenance depends on the severity of the service conditions.
WARNING
Avoid personal injury from sudden release of process pressure or bursting of parts. Before performing any maintenance
operations:
D Do not remove the actuator from the valve while the valve is still pressurized.
D Always wear protective gloves, clothing, and eyewear when performing any maintenance operations to avoid personal
injury.
D Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the
actuator cannot suddenly open or close the valve.
D Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure
on both sides of the valve. Drain the process media from both sides of the valve.
D Vent the power actuator loading pressure and relieve any actuator spring precompression.
D Use lock‐out procedures to be sure that the above measures stay in effect while you work on the equipment.
D The valve packing box may contain process fluids that are pressurized, even when the valve has been removed from the
pipeline. Process fluids may spray out under pressure when removing the packing hardware or packing rings.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
WARNING
For explosionproof applications, ensure the actuator cover is properly bolted before applying power to the actuator.
Personal injury or property damage may result from fire or explosion if power is applied to the actuator with the cover
removed in a hazardous area.
Do not remove the actuator cover for 10 minutes after power is disconnected if the UPS option is installed.
For explosion‐proof applications, install rigid metal conduit and a conduit seal no more than 457 mm (18 inches) from the
actuator. Personal injury or property damage may result from explosion if the seal is not installed.
Select wiring and/or cable glands that are rated for the environment of use (such as hazardous area, ingress protection, and
temperature). Failure to use properly rated wiring and/or cable glands can result in personal injury or property damage
from fire or explosion.
Wiring connections must be in accordance with local, regional, and national codes for any given hazardous area approval.
Failure to follow the local, regional, and national codes could result in personal injury or property damage from fire or
explosion.
Valve Plug and Seat Ring
Disassembly
Key Numbers are referenced in figures 21 and 22.
1. Isolate the control valve from the line pressure, release pressure from both sides of the valve body (key 1), and drain
the process media from both sides of the valve.