1035/El-O-Matic Actuator
Instruction Manual
Form 5417
February 2007
12
any maintenance operations to avoid
personal injury.
D The valve packing area may
contain process fluids that are
pressurized, even when the valve has
been removed from the pipeline.
Process fluids may spray out under
pressure when removing the packing
hardware or packing rings.
D Check with your process or safety
engineer for any additional measures
that must be taken to protect against
process media.
Actuator Disassembly
Remove the actuator from the valve, and remove
any other auxiliary equipment from the actuator.
(Note the positions of the mounting bracket and
accessories for re-assembly). Steps explaining the
disassembly and assembly of parts apply to both
ends of the actuator. If necessary, refer to the valve
instruction manual for removing and replacing the
valve in the pipeline.
Key numbers are shown in figure 11 for E Series,
and figure 12 for P Series actuators, unless
otherwise noted.
CAUTION
Butterfly valves must be in the closed
position before attempting to remove
them from the pipeline. The valve disc
can be damaged if the disc is not
moved to the closed position.
1. Remove the actuator mounting bracket and any
accessories.
2. When removing the actuator end caps, carefully
follow the steps below.
Operationally check the actuator to ensure that the
pistons are moved all the way to the center (towards
the drive shaft), before removing the actuator end
caps. Use the index mark on the top of the drive
shaft (see figure 4).
a. For Double Acting E and P Series
Actuators: Remove socket head screws from
both end caps with a metric hex key. After the
screws are removed, gently pry off each end cap.
Be careful not to damage the end cap sealing
surfaces.
b. For Spring Return E Series Actuators
It is very important to ensure that the springs are
fully extended by retracting the piston (key 2)
inwards toward the drive shaft (key 3). Refer to
figure 6.
WARNING
The pre-loaded spring pressure rests
on the pistons when they are extended
outward. If the end cap screws are
removed before
the spring loading is
reduced, the end cap (key 5) can fly off
the end of the actuator causing
personal injury or property damage.
Ensure that the pistons are moved
fully toward the drive shaft. If this is
not possible, provide a means of
containing the end cap while removing
the socket head cap screws.
The springs are retained within the end cap by the
spring holder (key 9).
D Unscrew end cap socket head screws
(key 36) a few turns
. Be sure the spring
compression is resting on the socket head cap
screws. Equally release the spring compression
while removing the socket head cap screws. The
spring precompression should be released
before the screws are completely removed.
Remove the spring cap assembly from the
actuator body.
