Emerson Fisher FIELDVUE DVC6000, Инструкция по эксплуатации

Страница: 36 / 162

DVC6000 Digital Valve Controllers
September 2013 2-14
Note
While the housing differs on the
DVC6015 and the DVC6010, feedback
parts are the same.
Refer to the following guidelines when mounting on
sliding-stem actuators with up to 4 inches of travel.
Where a key number is referenced, figure 8-7.
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. Attach the connector arm to the valve stem
connector.
3. Attach the mounting bracket to the remote
feedback unit housing.
4. If valve travel exceeds 2 inches, a feedback arm
extension is attached to the existing 2-inch feedback
arm. Remove the existing bias spring (key 78) from
the 2-inch feedback arm (key 79). Attach the feedback
arm extension to the feedback arm (key 79) as shown
in figure 2-2.
5. Mount the remote feedback unit on the actuator as
described in the mounting kit instructions.
6. Set the position of the feedback arm (key 79) on
the remote feedback unit to the no air position by
inserting the alignment pin (key 46) through the hole
on the feedback arm as follows:
For air-to-open actuators (i.e., the actuator
stem retracts into the actuator casing or cylinder as air
pressure to the casing or lower cylinder increases),
insert the alignment pin into the hole marked ‘‘A’’. For
this style actuator, the feedback arm rotates
counterclockwise, from A to B, as air pressure to the
casing or lower cylinder increases.
For air-to-close actuators (i.e., the actuator
stem extends from the actuator casing or cylinder as
air pressure to the casing or upper cylinder increases),
insert the alignment pin into the hole marked ‘‘B’’. For
this style actuator, the feedback arm rotates
clockwise, from B to A, as air pressure to the casing or
upper cylinder increases.
4-INCH 1/4-20
HEX HEAD SCREW
STANDOFF
MOUNTING BRACKET
PIPESTAND MOUNTING
WALL MOUNTING
MOUNTING BRACKET
1-INCH 1/4-20
HEX HEAD SCREW
W8473 / IL
W8474 / IL
SPACER
Figure 2-13. FIELDVUE DVC6005 Base Unit Mounting
Note
When performing the following steps,
ensure there is enough clearance
between the adjustment arm and the
feedback arm to prevent interference
with the bias spring.
7. Apply lubricant to the pin of the adjustment arm. As
shown in figure 2-3, place the pin into the slot of the
feedback arm or feedback arm extension so that the
bias spring loads the pin against the side of the arm
with the valve travel markings.
2