Actuator Operation - Emerson Bettis G01 Series Installation, Operation And Maintenance Manual

Section 1: Introduction
July 2020
1.10.3 When actuator is first placed into service, it should be cycled with regulated
1.10.4 The actuator speed of operation is determined by a number of factors includes:
1.10.5 Due to the interaction of these variables, it is difficult to specify a "normal"
1.10.6 Slower operating time may be obtained by using flow control valves to meter the
1.11

Actuator Operation

1.11.1 Controlled Operation: Controlled operation is accomplished by pressurizing and/or
1.11.2 Manual Operation: All pressure must be vented or equalized on both sides of the
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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)
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
exhaust. Excessive exhaust flow metering may cause erratic operation.
depressurizing the appropriate cylinder inlet(s) of a Double-Acting. Do not exceed
pressures indicated on actuator nameplate.
pneumatic piston prior to manual operation.
Installation, Operation and Maintenance Manual
VA-DC-000-1803 Rev. 2
Introduction