Service Instructions
137463E Rev. D
August 2015
5
Section 1: Introduction
Introduction
NOTE:
Scale and debris can damage control valves, solenoids and seals.
1�11
Actuator Start-up
1.11.1 Prestart-up checks
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.
1.11.2 Check Connections
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.
1.11.3 When actuator is first placed into service, it should be cycled with regulated
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.
1.11.4 The actuator speed of operation is determined by a number of factors includes:
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)
1.11.5 Due to the interaction of these variables, it is difficult to specify a "normal"
operating time. Faster operating time may be obtained by using one or more of
the following:
1. Larger supply lines
2. Larger control valve
3. Higher supply pressure*
4. Quick exhaust valves
—
* Not to exceed maximum operating pressure of actuator or
control components
1.11.6 Slower operating time may be obtained by using flow control valves to meter the
exhaust. Excessive exhaust flow metering may cause erratic operation.
