rotork YT-2700, Product Manual

Page: 27 / 51

Smart Positioner
YT-2700 Product Manual
Ver. 1.18
27
6 Adjustments
6.1 Variable Orifice Adjustment
Hunting can be occurred when the actuator
’s volume is too small. In order to prevent hunting, orifice
can be adjusted. By adjusting the orifice, the flow rate of the supply pressure to actuator can be
adjusted. Please use (-) driver to adjust the orifice. When the top of the orifice goes up and reaches
at the bottom of the bolt head, the flow rate becomes maximum. When the bottom of the orifice goes
down and reaches at body base, the flow rate becomes minimum.
Fig. 6-1: Variable orifice adjustment
6.2 Manual buttons
By pressing “SUP” and “EXH” buttons, YT-2700 can be manually operated without and input signal.
“SUP” button allows supply air to transfer to the actuator from positioner’s OUT1 port, and “EXH”
button allows air to exhaust air from the actuator to the atmosphere through the positioner. By
utilizing this function, the user can easily mount the positioner or check actuator.
Fig. 6-2: Manual buttons