Instruction Manual
657 Actuator (30-70 and 87) December 2010
D100306X012
Figure 3. Actuator Mounting Components for Size 30 through 70 Actuators NPT INTERNAL CONNECTION DIAPHRAGM CASING DIAPHRAGM AND STEM SHOWN IN UP POSITION DIAPHRAGM PLATE LOWER DIAPHRAGM CASING ACTUATOR SPRING ACTUATOR STEM SPRING SEAT SPRING ADJUSTOR STEM CONNECTOR YOKE TRAVEL INDICATOR DISK INDICATOR SCALE
W0363-1
VALVE STEM YOKE LOCK NUT
MATCH LINE FOR ACTUATOR
YOKE BOSS DIAMETER BONNET
TYPICAL VALVE (REFER TO VALVE MANUAL) 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.
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