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Mounting a Fisher FIELDVUE DVC6200 Digital Valve Controller on a 657 or a 667 Size 40i Actuator

Mounting a Fisher FIELDVUE DVC6200 Digital Valve Controller on a 657 or a 667 Size 40i Actuator


Welcome back to the plantweb lab here
at Emerson Process Management in Marshalltown, Iowa.
I’m James Holloway. In this video we’re going to show you how to mount a FIELDVUE DVC6200 Digital Valve Controller to a Fisher 657 or 667 size i actuator. For this video we will mainly use a fail up 657 size 40i actuator but we’ll show a fail down 667 size i
from time to time to point out a few important differences. Both the 657 and 667 size i have an integrated mounting pad to facilitate
mounting of a digital valve controller. However, the 667 size i has an
integral air passageway which the 657 size i does not. This enables
you to mount a DVC6200 on the 667 size i without any exterior
tubing. We’ll explain this in more detail later. As always we want to make sure we
review all the safety precautions found in the instruction manuals for the DVC6200 657 size i and 667 size i actuator. You can find
these documents online by following the links in the video description below.
Take time to ensure you have the necessary safety equipment and tools
needed for this assembly: safety glasses, safety gloves, the black mounting
template package with your DVC, a screwdriver, and a wrench. We need to
take two precautions before proceeding. First, completely isolate the valve and
actuator from the process if it’s in service. Second, you must ensure that
there is no force on the actuator stem. For the 657 size i, we need
to completely vent the actuator to ensure the stem is fully retracted. For a
667 size i, applying pressure to the actuator equal to the upper
operating range will bring the valve plug off the seat and remove force from
the coupling block. The next few steps are identical for the
657 and 667 size i. With the actuator in fail up position, we’re going to install the connector arm onto the coupling block. Depending on the size of your actuator, the connector arm may have slight variations so always
check that your mounting kit is the right size for your actuator. To attach
the connector arm first remove one of the two bolts from the coupling block
then install the bolt through the slot and the connecting arm and tighten.
Repeat this process with the other bolts. Be sure that when the connecting arm is
fixed in place the thin slotted extension hangs downward. Leave the bolts
loose because we’ll fine tune the alignment here shortly.
Next, we’ll attach the magnetic array to the connector arm. This is done by lining
up the magnetic array to the right of the slotted extension on the connecting
arm. Once in place fasten the array with the two screws provided until they are
snug but do not over tighten them. We’ll fine tune the alignment of the
connecting arm in magnetic array using the black alignment template. Insert the
alignment template into the actuator yoke leg as shown here and move the
connector arm horizontally until the array fits the channel in the template.
Tighten the bolts on the coupling block to fix the connecting arm in place. Now
you must adjust the array to the correct vertical position. Start by loosening the
snug screws so that the array is free to move up and down within the thin slot.
For a 657 size i, adjust the array so that the bottom white line is
even with the white line on the alignment template. For a 667
size i, once the cap screws in the connector block have been properly
tightened relieve all actuator pressure to ensure the valve plug is seated. Then
adjust the array so that the white line on the template is even with the top
white line on the array. With that in position, tighten the screws holding the array. Please note that your mounting kit may
include a hex key to be used with the magnetic array fasteners for added
security especially in vibrating services medium threadlocker may be
applied. Once we’ve aligned the magnetic array, we’ll stroke the valve one
complete cycle to make sure the templates white line stays within the
lines on the array for the full travel distance. Now that the array is properly
aligned we can mount the DVC to the yoke. With a 667 size i, air
travels from the output port in the back of the DVC to the input port on the
front of the mounting pad. To protect this connection place an o-ring included
with the mounting kit in the port prior to mounting the DVC on the yoke as shown. The 657 size i doesn’t have
an integral air passage so it uses tubing to transfer air like a
traditional actuator, however, you do need to plug the pneumatic port in the back
of the DVC to prevent air leakage. Position the DVC on the actuators
mounting pad and line up the 3 corresponding bolt holes. Place the three
long hex cap screws through the rear of the yoke into the DVC. For a 657 size i, use tubing to connect the actuators pneumatic input port with the
DVC output port. We’ve now learned how to mount a FIELDVUE DVC6200 Digital
Valve Controller to a Fisher type 657 or 667 size i
actuator using the integrated mounting pad on the yoke. So, let’s review the
steps we took. First, we install the connector arm to the coupling block
remember to relieve the pressure in the actuator when using a 657 size i or use air to lift the valve plug off its seat with a 667
size i. Second, we attach the magnetic array to the connector arm. Third, we use
the mounting template to properly adjust the connector arm and magnetic array.
Fourth, we confirmed that the pneumatic output port in the back of the DVC is
plugged for a 657 size i. For a 667 size i, we ensured
the o-ring was in place prior to mounting the DVC to the yoke. Finally, we
attach the DVC6200 to the yoke using the three hex cap screws. Tubing was
installed for 657 size i. For more information on the Fisher 657 size i and 667 size i actuators, FIELDVUE DVC6200,
or any other Fisher products visit the website below and thanks for watching!

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