Installation - Emerson Fisher 785C Instruction Manual

Instruction Manual
D104483X012
Figure 2. Lifting Angle
SPRING RETURN ACTUATOR
CENTERLINE HORIZONTAL LIFT

Installation

Key numbers in this procedure are shown in figures 9 to 28, unless otherwise indicated.
WARNING
To avoid personal injury or property damage caused by cylinder fracture as a result of piston impact, install the stem
connector securely before supplying pressure to the positioner. Use only a regulator-controlled air supply to move the
actuator piston so that you can install the stem connector. Do not use the positioner to move the actuator piston before
installing the stem connector.
Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal
injury.
If installing into an existing application, also refer to the warning at the beginning of the Maintenance section in this
manual.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
To avoid personal injury or property damage caused by bursting of pressure‐retaining parts, be certain the cylinder
pressure or other pressure ratings do not exceed the limits listed in table 1. Use pressure‐limiting or pressure‐relieving
devices to prevent cylinder pressure or other pressures from exceeding these limits.
To avoid personal injury or equipment damage, use proper lifting and rigging practices while lifting the actuator or
valve/actuator assembly. For all mounting procedures use an adequately sized chain, sling, hoist, or crane to handle the
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785C ACTUATOR
VERTICAL HORIZONTAL LIFT
785C Actuator
May 2022
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