Actuator Start-Up - Emerson CBA730 Disassembly And Reassembly

Service Instructions
137462E Rev. D
1.10.3 Good instrument practices are also recommended. Clean/dry regulated
NOTE:
Scale and debris can damage control valves, solenoids and seals.
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Actuator Start-up

1.11.1 Prestart-up checks
1.11.2 Check connections
1.11.3 When actuator is first placed into service, it should be cycled with regulated
1.11.4 The actuator speed of operation is determined by a number of factors includes:
Introduction
pneumatic pressure is essential for long service life and satisfactory operation.
It should be noted that new pneumatic lines often have scale and other debris in
them and these lines should be purged of all foreign material.
1. Inspect to ensure the unit has been mounted onto valve properly. Gear
flange mounting bolts, stem key, set screw(s) are installed and secured.
2. No tubing damaged or accessories dislodged during the shipping or
the installation.
3. Indicated position confirms valve position.
4. All switching valves in normal operating position as per
SCHEMATIC / INSTRUCTIONS.
1. Pneumatic / hydraulic components connected as per schematic enclosed or
in service manual supplied.
2. Pneumatic supply connected to the identified ports.
3. Electrical connection terminals are secured.
4. Wiring as per enclosed diagram or service manual supplied.
pneumatic pressure. This is necessary because the seals have been stationary,
causing them to take a "set". Therefore, the actuator should be operated through
several cycles to exercise the seals so as to achieve a service ready condition.
1. Power supply line length
2. Power supply line size
3. Power supply line pressure
4. Control valve and fitting orifice size
5. Torque requirements of the valve
6. Size of the actuator
7. Setting of speed controls
8. Hydraulic Manual Override (where available)
Section 1: Introduction
August 2015
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