Instruction Manual
D102087X012
585C Actuator
October 2013
10
Actuator with Spring Return (figure 3)
585C size 25 & 50 actuators are available with bias springs in two configurations. The 585C actuator, with the bias
spring under the piston, fully retracts the actuator stem upon loss of cylinder pressure. The 585C actuator, with the
bias spring on top of the piston, fully extends the actuator stem upon loss of cylinder pressure. No additional parts are
required to convert from one actuator type to the other.
For more detailed information on the 3610 positioner and DVC6200 digital valve controllers, refer to the Principle of
Operation section in the 3610 and DVC6200 Instruction Manuals.
Installation
WARNING
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. Use only a regulator-controlled air supply to move the
actuator piston so that you can install the stem connector. Do not use the positioner to move the actuator piston before
installing the stem connector.
Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal
injury.
To avoid personal injury or property damage caused by bursting of pressure-retaining parts, be certain the cylinder
pressure or other pressure ratings do not exceed the limits listed in table 1. Use pressure-limiting or pressure-relieving
devices to prevent cylinder pressure or other pressure ratings from exceeding these limits.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance sections in this
instruction manual.
When an actuator and valve are shipped together as a control valve assembly, the actuator is normally mounted on the
valve. Follow the valve instructions when installing the control valve in the pipeline. If the actuator is shipped
separately or if it is necessary to mount the actuator on the valve, perform the Actuator Mounting procedures in this
instruction manual corresponding to your actuator size. For information on mounting valve positioners, refer to the
3610 or DVC6200 instruction manuals for details.
If a 585C actuator is being installed without a positioner, the cylinder loading pressures should be supplied through a
4-way solenoid valve or a switching valve. The bottom side of the piston is pressured through the bottom side of the
mounting flange on the actuator yoke (key 6, figures 4 and 6) for sizes 25 and 50 or the connection at the lower side of
the cylinder (key 1, figure 9 to 12) for sizes 60 to 130. The top side of the piston is pressured through the connection in
the cylinder cover (key 1 for figures 4, 6; and 9 to 12).
The supply pressure medium should be clean, dry filtered air. If the supply source is capable of exceeding the
maximum actuator operating pressure or positioner supply pressure, appropriate steps must be taken during
installation to protect the positioner and all connected equipment against overpressure.
WARNING
Dropping the actuator and any attached accessories and/or valve may cause personal injury and/or equipment damage. For
all mounting procedures use an adequately sized chain, sling, hoist, or crane to handle the actuator and any attached
