Leslie Controls DIAPHRAGM ACTUATOR 135(R) - Manual (Page 2)

2
SCOPE
The following instructions cover installation, operation and
maintenance of Leslie's diaphragm actuators.
INSTALLATION
Before starting installation of the actuator assembly, units
should be unpacked and checked against packing list and/or
the approved customer drawing.
1. Actuator is designed to be mounted in the vertical
position. For other than vertical installations piping
supports may be required. Consult factory.
Assemble Direct (Spring to
retract) Actuator to Equipment
1.
Ensure that there is no spring tension on actuator by
"unscrewing" spring adjusting nut (35). (see Fig 1)
2.
Connect air supply to the top of the actuator until the
stem is fully extended.
3.
Ensuring that the thread size of the actuator and the
control valve stem (refer to Fig 2 dimension x) is the
same, and after lifting valve plug screw the actuator
onto the stem about 1 diameter of thread.
4.
Remove air supply and secure actuator to equipment.
(NEED TO PUT BOLT TORQUE VALUES FOR
STUDS TO HOLD ACTUATOR DOWN)
5. See Stroke adjustments section for final setting of
actuator.
Assemble Reverse (Spring to
extend) Actuator to Equipment
1.
Ensure that there is no spring tension on actuator by
"unscrewing" spring adjusting nut (40). (See Fig 3)
2. Ensuring that thread size of actuator and control valve
stem (refer to Fig 4 dimension x) is the same, and after
lifting valve plug screw actuator onto equipment about
1 diameter of thread.
3. Connect air supply to bottom of actuator and allow
actuator to come to rest on valve stem. Secure actuator
to stem.
4. See stroke adjustments section for final setting of
actuator.
Setting Actuator Stroke
1.
Apply air to either bottom (Reverse) or top (Direct) of
actuator and note the total travel distance of actuator.
2.
To adjust stroke of actuator, retract actuator stem by
removing air from actuator (Direct) or applying air to
actuator (Reverse). Screw equipment stem further into
actuator and then stroke actuator again.
3.
Repeat step 2 until desired stroke is reached.
4.
Secure Travel indicator (42) to actuator yoke (4) by
fastening screw (43) as shown. (See Fig 3)
Setting the Actuator Spring
Load
1. To adjust load given by failure mode
(Direct/Reverse) of actuator, first remove all air
pressure from actuator.
2.
Hold actuator stem in place with a wrench.
3. Using a steel bar (see Table 1), turn spring
adjusting nut (40) one half turn. (See Fig 3)
4.
Measure force output of spring to see if at desired
load. (This can be done by slowly applying air to
actuator and recording at what air pressure actuator
CAUTION!
All warnings and instructions from equipment IOM
that Actuator is mounted to must be followed.
CAUTION!
Keep all body parts away from any moving parts of
actuator to prevent injury/death. Since air is being
used to move actuator proper safety equipment (i.e.
safety glasses) must be worn. Actuator contains a
very powerful spring, extreme caution must be used
when operating actuator. When supplying air to
actuator do not exceed 60 psig.