Emerson Process Management 1051 - Manual (Page 19)

Instruction Manual
D100320X012
1051 and 1052 H & J Actuators
October 2012
19
For size 70 actuators, the spring barrel need not be aligned in any particular position when placing it on the housing.
Note
Refer to table 11 for bolting torques for actuator bolts and cap screws. Exceeding any torque requirement may impair the safe
operation of the actuator.
2. Proceed as appropriate:
For 1051 actuators,
a. Coat the thread of the cap screw (key 9) and the tapered end of the diaphragm rod (key 10) with lithium grease
(key 76).
b. Assemble the diaphragm rod, spring seat (key 13), spring (key 11), and diaphragm plate (key 4), and secure with
the cap screw (key 9). Tightening the cap screw will compress the spring. Be certain the tapered end of the
diaphragm rod is seated in the corresponding hole in the diaphragm plate, that the spring is seated in the spring
seat, and that the cap screw is tightened to the torque specified in table 11.
c. Install the hex nut (key 58), turnbuckle (key 57), hex nut (key 16), and rod end bearing (key 17) onto the
diaphragm rod.
d. Be certain the travel stops (key 8) are located as shown in figure 11.
e. Install the diaphragm plate and attached parts into the actuator.
f. Be sure the warning nameplate (key 56) is in place. Install the diaphragm (key 3) and the upper diaphragm casing
(key 1). Install the cap screws and hex nuts (keys 5 and 6). Tighten the cap screws evenly in a crisscross pattern to
compress the spring and secure the upper diaphragm casing. Tighten these cap screws to the torques shown in
table 11.
For 1052 actuators,
a. Proceed as appropriate:
D For actuator designs without a set screw in the spring barrel (key 12), if the adjustor and attached parts were
removed, first clean and then lubricate the upper threads of the adjustor (key 74) with lithium grease (key 76) as
shown in figure 13. Install the lower bearing seat (key 73), the thrust bearing (key 71), the thrust bearing races (key
72), and the spring seat (key 13) onto the adjustor. Then, first clean and then coat the lower end of the adjustor
with thread-locking adhesive (high strength) (key 77) as shown in figure 13, and install the entire assembly into the
spring barrel (key 12). Let the adjustor stand undisturbed for at least two hours after installation to allow the
thread-locking compound to cure.
CAUTION
When applying lubricant to the upper threads and thread-locking compound to the lower threads of the adjustor, do not
overlap the coat of lubricant with the coat of thread-locking compound since this will adversely affect the performance
quality of both substances.
D For actuator designs with a set screw, (key 75), if the adjustor (key 74) and attached parts were removed, lubricate
the threads of the adjustor with lithium grease (key 76). Install the lower bearing seat (key 73), the thrust bearing