Pressure Connections; Adjustment - Fisher 1061 Instruction Manual

Instruction Manual
D100325X012

Pressure Connections

1. If a positioner is used, the pressure connections to the actuator are normally made at the factory. Actuators without
positioners should have either a 4‐way solenoid valve or a switching valve connected to the pressure connections
located at the top and bottom of the actuator cylinder.
2. Connect either pipe or tubing between the actuator pressure connections and the positioner or automatic
controller. Keep the length of pipe or tubing as short as possible to avoid transmission lag in the control signal.
Table 6. Wrench Sizes Required for Actuator Adjustment, Inches
Actuator
Size
30
40 & 60
68
3. When the actuator is completely installed and connected to the instrument, check for correct action (air‐to‐open or
air‐to‐close) to match the controlling instrument. For successful operation, the actuator stem and operating shaft
must move freely in response to the loading pressure change on the piston.

Adjustment

WARNING
Perform the steps in the WARNING at the beginning of the Maintenance section.
The only adjustment on the 1061 actuator is to make sure that the valve or other operated equipment is correctly
closed when the actuator piston is against the travel stop. For accurate adjustment, the valve or other operated
equipment must be removed from the pipeline.
If the actuator is equipped with an auxiliary manual handwheel actuator, make sure that the manual actuator is
disengaged from the operated shaft and that the bypass valve (key 68, figure 8) is closed before performing
adjustment procedures.
Perform the following steps to adjust the actuator turnbuckle. A regulated air supply will be required to stroke the
actuator during this procedure. Also, when performing adjustment, refer to table 6 for the sizes of open‐end wrenches
required to loosen and tighten the hex nuts and turnbuckle. Key numbers referenced in this procedure are shown in
figure 6.
1. Remove the access plate (key 72). Also remove the machine screws (key 73) if present.
Note
The cover (key 34) supports the outer end of the output shaft and should not be removed during actuator adjustment.
2. Stroke the actuator until the lower hex nut (key 11) can be reached through the access opening. Loosen the hex
nut.
3. Stroke the actuator until the left‐hand threaded upper hex nut (key 71) can be reached through the access opening.
Loosen the hex nut.
Turnbuckle
(Key 70)
1‐1/8
1‐5/16
1‐7/8
Hex Nut
(Key 11)
3/4
1‐1/8
1‐1/8
1061 H & J Actuator
January 2016
Hex Nut
(Key 71)
1‐1/8
1‐5/16
1‐7/8
11