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LOGISTICS
23
NDX VALVE CONTROLLER
7.3
Installation to any linear actuator
NDX can be easily installed to any linear actuator when the
following installation rules are followed. In order to guar
antee the best possible position measurement accuracy,
NDX and position feedback magnet must be positioned
according to the following guidelines.
Tol/ 3 [mm]
Magnet center
Magnet center travel limit
(fixing bolt line)
Magnet center travel limit
(fixing bolt line)
Fig. 22
When installing the device to any other actuator model
make sure that the following tolerances are followed with
magnet mounting.
1. Magnet shall be centered / 3 mm tolerance
as shown in the picture.
2. Magnet center shall never exceed the magnet center
travel limits shown in the picture.
NOTE
Use only Metso original magnets.
Bracket and fixing bolt material should have
low magnetic permeability (e.g. AISI316 or
aluminium).
NOTE
Always ensure that the magnet center stays
within magnet center travel limits on the
complete operation range of the valve.
NOTE
Shorter actuator stroke allows more freedom
for alignment of the magnet and NDX in
actuator stroke direction. Magnet position does
not affect the measurement accuracy as long
as the magnet center stays within the magnet
center travel limits for whole travel range.
7
LINEAR MOUNTING
MOUNTING