Instruction Manual
D102087X012
585C Actuator
October 2013
14
5. Once the total travel is adequate, tighten the stem connector (key 12) securely, lock the stem locknuts (key 15)
against the connector, and adjust the indicator scale (key 19) on the yoke to show correct valve plug position.
6. Provide a gauge to measure the pressure to the actuator. Make a final adjustment of the actuator or its positioner to
set the starting point of valve travel and to obtain full travel for the given instrument range.
585C Size 60-130 Reverse-Acting (Push-Down-to-Open) Valves
1. Keeping your hands away from moving parts, pressure the actuator, using a regulator-controlled air supply, to
move the actuator stem (key 10) to the extreme upward position then reverse loading pressure to lower the
actuator stem (key 10) approximately 3 mm (1/8 inch).
2. Pull the valve stem up to seat the valve plug.
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.
4. If there is a travel indicator disk (key 32), raise it to the stem connector (key 12) and tighten in position with the
stem locknuts (key 15). The indicator disk (key 32) should show the valve to be open with the piston (key 3) at the
bottom of its stroke. If it does not, loosen two screws (key 18) and shift the travel indicator scale (key 19) to indicate
OPEN.
5. Cycle the actuator to check availability of desired total travel and that the valve plug seats before the actuator
contacts the upper 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. If the valve stem cannot be turned, as with a bellows seal bonnet,
remake the stem connection to achieve the desired travel.
6. Once the total travel is adequate, tighten the stem connector (key 12) securely, lock the stem locknuts (key 15)
against the connector, and adjust the indicator scale (key 19) on the yoke to show correct valve plug position.
7. Provide a gauge to measure the pressure to the actuator. Make a final adjustment of the actuator or its positioner to
set the starting point of valve travel and to obtain full travel for the given instrument range.
585C Handwheels
Handwheel Operation (Sizes 25 & 50)
Key numbers referenced in the following steps are shown in figures 5, 7, and 8 for the 585C actuator.
The handwheel assembly on a 585C actuator may be used as an adjustable travel stop to limit full upward or
downward travel of the actuator stem (key 10), or as a manual actuator to fully stroke the valve. When the neutral
indicator (key 42) is in the neutral position, travel is not restricted. With clockwise handwheel (key 47) rotation, the
operating nut (key 46) is screwed downward, forcing the actuator stem (key 10) down. With counterclockwise
rotation, the operating nut is screwed upward against the handwheel stem washer (key 45), pulling the actuator stem
up.
Note
When using an actuator with handwheel to stroke the valve plug or position the travel stop, be sure the bypass valve (key 66) is
open.
Handwheel Operation (Sizes 60-130)
The 585C handwheel assembly for sizes 60 through 130 actuators (figures 9 and 10) has three main functions:
