Emerson Fisher GX Instruction Manual page 25

Instruction Manual

D103175X012

Figure 9. Fisher GX Travel Stop Orientation

ACTUATOR

ROD

STEM

CONNECTOR

APPLY

LITHIUM

GREASE TO

LEVERS

DOWNSTOP

Setting the Travel Stop Position

After sending the required position air signal to the actuator, screw the adjustable cap screws to assure the lever

contacts with the stem connector tightly, then tighten the back nut. Check the actual stem position when giving the

100% air signal.

Standard Accuracy for the travel stop position is +/- 10% for 20 mm travel. For added precision, use the following

procedure.

1. Send the desired position air signal to the actuator.

2. Set the travel stop, screw the adjustable cap screws to assure the lever contacts with the stem connector tightly,

then tighten the back nut.

3. Send a 100% air signal.

4. Measure the difference between the actual stem position and the desired position.

5. Send the air signal for the desired position minus the differential position measured in step 4.

6. Reset the travel stop by adjusting the two cap screws and then tighten the back nut.

BRACKET

LEVER

BACK NUT (2)

ADJUSTABLE

CAP SCREW (2)

RETAINING RING

SHAFT

APPLY

LITHIUM

GREASE TO

LEVERS

STEM

CONNECTOR

UPSTOP

GX Valve and Actuator

April 2011

ACTUATOR

ROD

LEVER

SHAFT

RETAINING RING

ADJUSTABLE

CAP SCREW (2)

BACK NUT (2)

BRACKET

25