Actuator Operation - Emerson Bettis CBB Series Disassembly And Reassembly

Section 1: Introduction
October 2015
1�11�2 Check Connections:
1�11�3 When actuator is first put into service it should be cycled with regulated
1�11�4 The actuator speed of operation is determined by a number of factors including:
1�11�5 Due to the interaction of these variables it is difficult to specify a "normal"
1�11�6 Slower operating times may be obtained by using flow control valves to meter the
1�12

Actuator Operation

1�12�1 Controlled Operation: Controlled operation is accomplished by pressurizing and/or
1�12�2 Manual Operation: All pressure must be vented or equalized on both sides of the
5
1. Pneumatic/hydraulic components connected as per schematic enclosed
or in service manual supplied.
2. Pneumatic supply connected to identified ports.
3. Electrical connections terminals are secure.
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, exercising the seals, resulting in 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
operating time. Faster operating times 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. Normally,
incoming supply should not be metered.
depressurizing the appropriate cylinder inlet(s) of a double-acting.
Do not exceed pressures indicated on actuator nameplate�
pneumatic piston prior to manual operation.
Service Instructions
VA001-196-30 Rev. 1
Introduction