Emerson FISHER 657 Instruction Manual page 4

657 Actuator (30-70 and 87)
December 2010
Figure 3. Actuator Mounting Components for Size 30 through 70 Actuators
NPT INTERNAL CONNECTION
DIAPHRAGM AND STEM
SHOWN IN UP POSITION
DIAPHRAGM PLATE
W0363-1
W6199-1
CAUTION
To avoid parts damage, do not use an operating pressure that exceeds the Maximum Diaphragm Casing Pressure (table 1)
or produces a force on the actuator stem greater than the Maximum Allowable Output Thrust (table 1) or the maximum
allowable valve stem load. (Contact your Emerson Process Management sales office with questions concerning maximum
allowable valve stem load.)
D Valve/Actuator Assembly: If the actuator and valve are shipped together as a control valve assembly, it has been
adjusted at the factory, and may be installed in the pipeline. After installing the valve in the pipeline, refer to the
Loading Connection procedures.
4
DIAPHRAGM CASING
LOWER DIAPHRAGM CASING
ACTUATOR SPRING
ACTUATOR STEM
SPRING SEAT
SPRING ADJUSTOR
STEM CONNECTOR
YOKE
TRAVEL INDICATOR DISK
INDICATOR SCALE
VALVE STEM
YOKE LOCK NUT
YOKE BOSS DIAMETER
BONNET
TYPICAL VALVE
(REFER TO VALVE MANUAL)
Instruction Manual
MATCH LINE
FOR ACTUATOR
D100306X012