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GE Oil & Gas
Inspecting Actuator, Linkages, or Rotary Adapter
Verify that the mounting has not been damaged in shipment for a pre-mounted SVI II AP, physi-
cally inspect the actuator, linkage. Record the following information for the configuration check-
out:
1. Valve Air to Open (ATO) or Air to Close (ATC)
2. Actuator pressure rating
3. Actuator bench range
4. Inherent trim characteristic of the control valve; linear, equal percentage, or other.
NOTE
Refer to the valve data sheet or model number of control valve.
Verifying Mounting and Linkage Adjustment
Inspect the mounting and make any needed adjustments before running the positioner and
checking the digital configuration.
Checking the Magnet
There are two methods of checking the SVI II AP magnet:
Perform a visual inspection
Use ValVue to check the magnet
Performing a Visual Inspection
You must remove the positioner from the bracket to visually inspect the magnet orientation.
For rotary valves, such as a Camflex, or for actuators with rotation of less than 60°, the magnet
assembly must be aligned as shown in Figure 21.
For rotary valves with rotations greater than 60°, the magnet assembly must be aligned as
shown in Figure 22 on page
41.
NOTE
For a reciprocating globe valve, it is not necessary to remove the
positioner from the bracket. Details are given below.
For reciprocating valves the adjustable link turnbuckle must be parallel to the valve stem. To en-
sure linearity in positioning, verify that the hole in the lever aligns with the indicating hole in the
bracket when the valve is in the closed position. Check that the bracket is mounted using the
proper holes (refer to Table
4 on page
28).
