Quick Start Guide
D103556X012
DVC6200 Digital Valve Controllers
July 2017
6
Sliding‐Stem Linear Actuators
Bracket Mounted
Fisher 667 and 657
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.
Figure 2. Mounting Parts for Sliding‐Stem Actuator with up to 210 mm (8.25 inches) Travel
MOUNTING
BRACKET
ACTUATOR
DIGITAL VALVE
CONTROLLER
FEEDBACK BRACKET
AND MAGNET ASSEMBLY
X0381-1
2. Attach the mounting bracket to the actuator.
3. Loosely attach the feedback pieces and magnet assembly to the valve stem connector. Do not tighten the fasteners
because fine adjustment is required.
CAUTION
Do not install a magnet assembly that is shorter than the physical travel of the actuator. Loss of control will result from the
magnet assembly moving outside the range of the index mark in the feedback slot of the DVC6200 housing.
4. Using the alignment template (supplied with the mounting kit), position the magnet assembly inside the retaining
slot.
5. Align the magnet assembly as follows:
D For air‐to‐open actuators (e.g. Fisher 667) vertically align the magnet assembly so that the center line of the
alignment template is lined up as close as possible with the upper
extreme of the valid travel range on the
magnet assembly. The magnet assembly should be positioned so that the index mark in the feedback slot of the
DVC6200 housing is within the valid range on the magnet assembly throughout the range of travel. See figure 3.
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