Mounting The Actuator On The Valve - Fisher 667 Instruction Manual

Instruction Manual
D100310X012
Figure 3. Actuator-Mounting Components for Size 30 through 70 Actuators
VENT ASSEMBLY
DIAPHRAGM CASINGS
DIAPHRAGM AND STEM
SHOWN IN DOWN POSITION
DIAPHRAGM
PLATE
LOADING AIR
PRESSURE CONNECTION
ACTUATOR SPRING
ACTUATOR STEM
SPRING SEAT
SPRING ADJUSTOR
STEM CONNECTOR
YOKE
TRAVEL INDICATOR DISK
INDICATOR SCALE
W0364-1
VALVE STEM
YOKE LOCK NUT
YOKE BOSS DIAMETER
BONNET
TYPICAL VALVE
(REFER TO
VALVE MANUAL)
W6199-1

Mounting the Actuator on the Valve

CAUTION
The 667 actuator spring load pushes the stem down out of the actuator yoke (see figure 2), and it can come in contact with
the valve stem during actuator mounting.
If the valve stem is allowed to remain in the up position (towards the actuator) during actuator mounting, it can interfere
with the actuator stem during mounting. It is possible to damage valve stem threads or bend the valve stem. Be sure the
valve stem is pushed down (into the valve body), away from the actuator while mounting.
667 Size 30-76 and 87 Actuators
MATCH LINE
FOR
ACTUATOR
June 2011
5