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Instruction Manual
D104738X012
Quarter-Turn Rotary Actuators
The 4400 can be mounted to any quarter-turn rotary shaft actuator, as well as those that comply with the NAMUR
guidelines. A mounting bracket and associated hardware are required. Refer to figure 8.
Before mounting, verify the rotary motion is 45 to 90 degrees of rotation.
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. Attach the magnet assembly to the actuator shaft. At mid‐travel, the flats on the magnet assembly should be
approximately parallel to the channel on the back of the 4400 housing, as shown in figure 8.
Note
When the actuator is at its travel limit, the feedback array must always be at a 45 degree angle, regardless of the orientation of the
position transmitter.
Figure 8. Magnet Assembly Orientation
MOUNTING
BRACKET
ISOLATION VALVE
NOTES:
1 IF THE ACTUATOR IS STROKED ALL THE WAY TO THE RIGHT OR CLOCKWISE, ATTACH THE
MAGNET ASSEMBLY SO IT POINTS TO THE UPPER RIGHT CORNER OF THE INSTRUMENT.
2 IF THE ACTUATOR IS STROKED ALL THE WAY TO THE LEFT OR COUNTERCLOCKWISE, ATTACH
THE MAGNET ASSEMBLY SO IT POINTS TO THE UPPER LEFT CORNER OF THE INSTRUMENT.
1
ORIENTATION AT ONE
TRAVEL EXTREME
ORIENTATION AT MID‐TRAVEL
(FLATS PARALLEL TO 4400
HOUSING CHANNEL)
W8836‐1A
W8836‐1B
ORIENTATION AT THE
OTHER TRAVEL EXTREME
2
MOUNTING
BRACKET
CONTROL VALVE
4400 Transmitter
October 2023
11
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