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Weir Power & Industrial - First choice for power and industrial protection
Sling the actuator by means of overhead tackle and carefully lining up the actuator with the
valve spindle axially and radially, lower the actuator on to the valve until the output shaft begins
to engage the valve spindle. Rotate the handwheel in the opening direction, and, at the same
time, gradually lower the actuator until the base face within the spigot location is flush with the
top face of the adaptor flange. Fit the nuts to the mounting studs and secure.
2.4 MECHANICAL VALVE POSITION INDICATOR (WHEN FITTED)
Set the pointer to the 'shut' index of the scale with the valve in the full shut position after
setting the limit switch.
2.5 MOTOR
The adjustment for wear of brushes for D.C. motors is the only attention required.
2.6 ALTERNATING CURRENT
For A. C. 2 and 3 Phase.
It is very important to ascertain that the direction of travel of the valve corresponds to the
'open' and the 'shut' button of the controller.
Carefully check the direction of travel of the valve with the movement of the controller by
having the valve in mid-position. Then press the 'open' or 'shut' operating button and
immediately after that stop the actuator and ascertain whether the valve has moved to
correspond to the button which was operated. If the valve has travelled in the opposite
direction, reverse any two of the supply leads in the contactor.
2.7 LUBRICATION
The actuator requires the minimum of lubrication and the motor bearings are packed for life.
A grease gun nipple is provided for the output shaft thrust bearings on Fig. 9052 actuators.
All other actuators are also fitted with grease gun nipples for journal bearings. Actuators for
mounting direct on to a valve are fitted with a grease gun nipple for valve stem lubrication.
When an actuator is fitted to a valve at site, the latter nipple should be fully charged when
commissioning, with the valve in the full open position, and not excessively lubricated during
service with the valve full shut. It is advisable to lubricate sparingly the limit switch and torque
switch unit gearing and moving parts.
RECOMMENDED LUBRICANTS:
SHELL ALVANlA GREASE No.3 - Grease gun nipples.
SHELL VITREA OIL No. 27 - Gears and moving parts of limit switch and torque switch
assemblies.