Inspecting Actuator, Linkages, Or Rotary Adapter; Verifying Mounting And Linkage Adjustment; Checking The Magnet - GE SVI II AP Quick Start Manual

Table of Contents

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

Inspect the mounting and make any needed adjustments before running the positioner and

checking the digital configuration.

There are two methods of checking the SVI II AP 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 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).

40 | =GE Oil & Gas

Refer to the valve data sheet or model number of control valve.

Perform a visual inspection

Use ValVue to check the magnet

For a reciprocating globe valve, it is not necessary to remove the

positioner from the bracket. Details are given below.

Table of Contents