Fisher Mounting Instructions: DVC6200 or DVC2000 Digital Valve Controller on a GX Control Valve and Actuator System | Fisher Manuals & Guides

DVC6200 or DVC2000

Mounting Instructions

D103457X012
May 2010

Use these instructions to mount a Fisher
FIELDVUEt DVC6200 or DVC2000 digital valve
controller on a Fisher GX control valve and actuator
system.

R

Control Valve and Actuator System

WARNING

Avoid personal injury or property
damage from sudden release of
process pressure or bursting of parts.
Before performing any maintenance
operations:

D Always wear protective clothing,
gloves, and eyewear when performing
any maintenance procedures to avoid
personal injury.

D Do not remove the actuator from
the valve while the valve is still
pressurized.

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 control valve.

D Use bypass valves or completely
shut off the process to isolate the
control valve from process pressure.
Relieve process pressure from both
sides of the control valve.

D Vent the pneumatic 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 Check with your process or safety
engineer for any additional measures
that must be taken to protect against
process media.

Refer to figure 2 and the parts list for mounting parts
identification. Refer to the DVC6200 or the DVC2000
digital valve controller instruction manual for digital
controller parts identification. Refer to GX Control
Valve and Actuator System Instruction Manual
(D103175X012) for actuator installation, operation,
maintenance, and parts identification.

Digital Valve Controller on a GX

1. Isolate the control valve from the process line
pressure and release pressure from both sides of
the valve body. Shut off all pressure lines to the
actuator, releasing all pressure from the actuator.
Use lock-out procedures to be sure that the above
measures stay in effect while you work on the
equipment.

2. Identify the yoke side to mount the digital valve
controller based on the actuator fail mode. Refer to
the GX instruction manual. If the actuator is
configured for Fail-Open (Air-to-Close) operation, a
vent must be installed in the lower diaphragm
casing’s supply connection on the actuator yoke leg.
If the actuator is configured for Fail-Closed
(Air-to-Open) operation, a vent must be installed in
the port on the upper diaphragm casing.

3. Ensure the actuator/valve stem connector
mounting face is visually square with the actuator
yoke legs. Attach the connector arm (key 7) to the
stem connector using the two hex head cap screws
(key 5) and plain washers (key 6) but do not tighten
(see figure 2).

4. Attach the magnet assembly (key 2) to the
connector arm with the two pan head machine
screws (key 1) and tighten (the magnet assembly
can be inverted 180_ without effect).

5. Attach the black plastic alignment template (see
figure 1) to the GX yoke by inserting the two
protruding posts into the two threaded mounting
holes in the yoke and simultaneously positioning the
magnet assembly so that it can slide into the
channel in the alignment template. The magnet
assembly should be fully in the alignment template
channel so that the stainless steel connector arm is
contacting the back of the alignment template but
not bending it. When the magnet assembly is
properly positioned, remove the alignment template
and tighten the hex head cap screws at the stem
connector.

6. Remove or install the appropriate plugs or
O-rings for the digital valve controller based on the
actuator fail mode.

7. Attach the GX label (key 3) to the digital valve
controller cover as shown in figure 2.

8. Confirm that the insulating gasket and seal are
pre-installed on the digital valve controller. Continue
on with step 9 if mounting a DVC6200 and step 10 if
mounting a DVC2000.

9. If installing a DVC6200 refer to figure 3.
Remove the vent from below the terminal box and
continue with the steps listed below.

www.Fisher.com

DVC6200 or DVC2000
Digital Valve Controller on a GX
Control Valve and Actuator System

a. Insert the two low-head hex socket bolts
(key 8) in the two tapped holes in the right yoke
leg, leaving approximately 12−15 mm of space
between the screw head and yoke (4−6 threads
of bolt). Refer to view 3.1 of figure 3.

b. Hold the instrument at a slight angle to the
actuator with the right side mounting slots under
the two pre-installed screws and rotate the
instrument so that it is flush with the actuator
yoke, see view 3.2 and 3.3 of figure 3. Install the
third hex socket bolt (key 8) as shown in view 3.4
and tighten all three bolts equally using an
appropriate Allen key.

c. Reinstall the vent below the terminal box as
shown in view 3.4 of figure 3.

ALIGN WITH TOP SENSOR
INDEX MARK FOR AIR-TO­RETRACT ACTUATOR

FIGURE SHOWS MAGNET
ASSEMBLY MARKING ALIGNED
WITH SENSOR INDEX MARK
FOR AIR-TO-EXTEND ACTUATOR

NOTE:
DURING THE COMPLETE STROKE OF THE ACTUATOR, AT ANY PARTICULAR
POSITION, THE DIGITAL VALVE CONTROLLER HALL SENSOR MUST REMAIN
WITHIN THE MARKING SHOWN ON THE MAGNET ASSEMBLY

Mounting Instructions

D103457X012

May 2010

ASSEMBLY MARKING

Figure 1. Alignment Template

d. Attach the 67CFR regulator to the DVC6200.
Continue on with step 11.

10. If installing a DVC2000 remove the digital
valve controller cover. Position the DVC2000 on the
GX yoke and tighten the three captive hex socket
bolts in the DVC2000. Continue on with step 11.

11. Check the position of the magnet assembly in
the channel of the digital valve controller housing
and ensure that it is visually centered between the
channel walls and has adequate clearance with the
backside of the channel (approximately 3 mm).
Ensure the feedback arm is positioned so that the
index mark on the pole pieces (back of positioner
housing) is between the marks on the magnet
assembly during the range of travel.

12. Calibrate the digital valve controller as
described in the appropriate instruction manual or
quick start guide.

For additional information concerning the mounting,
setup, calibration and maintenance of the DVC6200
or the DVC2000 digital valve controller, refer to the
appropriate instruction manual and the GX Control
Valve and Actuator System Instruction Manual
(D103175X012).

Note

Neither Emerson, Emerson Process
Management, nor any of their affiliated
entities assumes responsibility for the
selection, use, or maintenance of any
product. Responsibility for the
selection, use, and maintenance of any
product remains with the purchaser
and end user.

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