Instruction Manual
D102087X012
585C Actuator
October 2013
13
Size 60-130 Actuator Mounting
The following procedure describes how to mount a 585C size 60 to 130 actuator on a push-down-to-close valve so
that the piston stem to valve plug stem connection allows full travel and proper shutoff. Key numbers referenced in
the following steps are shown in figures 9 through 12.
If an actuator is purchased separately for field installation on a control valve, mount it on the valve and secure it in
place with the yoke locknut for size 60 and 68 or with eight bolts on actuator sizes 80, 100, and 130 which use a 127
mm (5-inch) yoke boss.
The stem connector should then be set up to clamp the actuator stem and valve plug stem together to provide the
proper valve travel. This procedure is outlined in the Stem Connector Assembly procedures of this instruction manual.
Stem Connector Assembly (Size 60-130)
CAUTION
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To avoid damaging the seating surfaces, do not rotate the valve plug while it is seated. Also avoid damage to the valve plug
stem by careful use of tools during travel adjustment.
WARNING
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To avoid personal injury or property damage caused by cylinder fracture as a result of piston impact, install the stem
connector securely before supplying pressure to the positioner. Incomplete engagement of valve stem and/or actuator
stem in the stem connector can result in stripped threads or improper operation. Be sure that the length of each stem
clamped in the stem connector is equal to or greater than the diameter of that stem. Do not loosen the cap screws
when the stem connector has spring or loading pressure force applied to it.
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Install the stem connector securely before a positioner is mounted to the actuator and pressurized, using only a
regulator- controlled air supply,
not the positioner,
to move the actuator piston to position the actuator stem.
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To avoid personal injury or property damage, keep hands and tools out of the actuator stem travel path while
pressuring the actuator to move the actuator stem in the following steps.
585C Size 60-130 Direct-Acting (Push-Down-to-Close) Valves
1. With the valve assembled and the actuator mounted, make sure the valve plug is in the closed position, and the
actuator is at the top of its stroke. Then screw the two stem locknuts (key 15) all the way onto the stem thread and
place the travel indicator disk (key 32) (if any) on the stem locknuts.
2. Keeping your hands away from any moving parts, use a regulator-controlled air supply to move the actuator stem
(key 10) down from the top of its stroke to the specified valve travel.
3. Using one half of the stem connector (key 12), align the actuator stem and the valve stem with threads from
both
stems mated root-to-crest with the stem connector. Install the other half of the stem connector and tighten the cap
screws. With the stem locknuts (key 15), raise the travel indicator disk (key 32) to the stem connector (key 12).
4. Cycle the actuator to check availability of desired total travel and that the valve plug seats before the actuator
contacts the lower travel stop. Minor travel adjustments can be made by loosening the stem connector (key 12)
slightly, tightening the locknuts (key 15) together, and screwing the valve stem either into or out of the stem
connector (key 12) with a wrench on the locknuts (key 15). If the valve stem cannot be turned, as with a bellows seal
bonnet, remake the stem connection to achieve the desired travel.
