Quick Start Guide
D103203X012
DVC2000 Digital Valve Controller
July 2017
8
Sliding-Stem (Linear) Actuators
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 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 array that is shorter than the physical travel of the actuator. Loss of control will result from the
magnet array moving outside the range of the index mark in the feedback slot of the DVC2000 housing.
4. Using the alignment template (supplied with the mounting kit), position the feedback array inside the retaining
slot.
5. Align the magnet array as follows:
D For air‐to‐open actuators (e.g. Fisher 667) vertically align the magnet array 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
feedback array. See figure 4.
D For air‐to‐close actuators (e.g. Fisher 657) vertically align the magnet array so that the center line of the
alignment template is lined up as close as possible with the lower
extreme of the valid travel range on the
feedback array. See figure 5.
Figure 4. Air‐to‐Open Magnet Array Alignment
W9718
ALIGNMENT
TEMPLATE
RETAINING
SLOT
LINE UP WITH
UPPER
EXTREME
OF VALID TRAVEL
RANGE
Figure 5. Air‐to‐Close Magnet Array Alignment
ALIGNMENT
TEMPLATE
W9719
RETAINING
SLOT
LINE UP WITH
LOWER
EXTREME
OF VALID TRAVEL
RANGE
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