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Installation, Operation and Maintenance Manual ManRE20en Rev.06/2022
OMC S.p.A: Via G. Galilei, 18 - 20060 - Cassina de Pecchi (MI) - ITALY - www.omcvalves.com - Tel.: (+39) 02.95.28.468
6. Check if feedback lever is vertical to the valve stem at 50% of the valve stroke. If it is not
vertical, adjust the bracket or the connection bar to make vertical. Improper installation may
cause poor linearity.
Fig. 3-6: Linear feedback lever and valve stem
7. Check the valve stroke. The stroke numbers are engraved on the feedback lever of the
positioner. Position the connection bar at the number on the feedback lever which corresponds
with the desired valve stroke. To adjust, move the bracket, the connection bar or both.
※
The effective linear feedback lever angle is 60 degree
Stroke : 75mm
Stroke : 45mm
Fig. 3-7: Linear feedback lever and location of the connection bar