Emerson Fisher FIELDVUE DVC6000, Инструкция по эксплуатации, Страница: 32 / 162

DVC6000 Digital Valve Controllers
September 2013 2-10
CAP SCREW,
HEX SOCKET
CAM
FOLLOWER ARM
EXTENSION
MACHINE SCREW,
LOCK WASHER,
HEX NUT
CAP SCREW
29B1673-A / DOC
Figure 2-6. FIELDVUE DVC6020 Digital Valve Controller with
Long Feedback Arm and Follower Arm Extension Mounted on a
Rotary Actuator
5. Larger size actuators may require a follower arm
extension, as shown in figure 2-6. If required, the
follower arm extension is included in the mounting kit.
Follow the instructions included with the mounting kit
to install the follower arm extension.
6. Apply anti-seize (key 64) to the arm assembly pin
as shown in figure 2-7.
7. Mount the DVC6020 on the actuator as follows:
If required, a mounting adaptor is included in the
mounting kit. Attach the adaptor to the actuator as
shown in figure 2-5. Then attach the digital valve
controller assembly to the adaptor. The roller on the
digital valve controller feedback arm will contact the
actuator cam as it is being attached.
If no mounting adaptor is required, attach the
digital valve controller assembly to the actuator or
mounting plate. The roller on the digital valve
controller feedback arm will contact the actuator cam
as it is being attached.
8. For long-stroke sliding-stem actuators, after the
mounting is complete, check to be sure the roller
aligns with the position mark on the cam (see
figure 2-4). If necessary, reposition the cam to attain
alignment.
MOUNTING
ADAPTER
FEEDBACK
ARM ASSEMBLY
BIAS SPRING
ARM ASSEMBLY PIN
ARM ASSEMBLY
MOUNTING
BRACKET
Figure 2-7. Locating Adjustment Arm Pin in Feedback Arm of a
FIELDVUE DVC6020 Digital Valve Controller
DVC6030 on Quarter-Turn Actuators
If ordered as part of a control valve assembly, the
factory mounts the digital valve controller on the
actuator, makes pneumatic connections to the
actuator, sets up, and calibrates the instrument. If you
purchased the digital valve controller separately, you
will need a mounting kit to mount the digital valve
controller on the actuator. See the instructions that
come with the mounting kit for detailed information on
mounting the digital valve controller to a specific
actuator model.
Figure 2-8 shows the DVC6030 digital valve controller
mounted on a quarter-turn actuator. Refer to figure 2-8
for parts locations. Refer to the following guidelines
when mounting on quarter-turn actuators:
Note
Due to NAMUR mounting limitations,
do not use the stainless steel
DVC6030S in high vibration service.
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
pneumatic actuator, releasing all pressure from the
actuator. Use lock-out procedures to be sure that the
above measures stay in effect while working on the
equipment.
2. If necessary, remove the existing hub from the
actuator shaft.
3. If a positioner plate is required, attach the
positioner plate to the actuator as described in the
mounting kit instructions.
2