Instruction Manual
D102087X012
585C Actuator
October 2013
11
accessories and/or valve. Use caution during lifting and handling to prevent slippage, swinging, faulty equipment
connections, or sudden shock loads.
CAUTION
To avoid damage to actuator parts and difficult operation of actuator handwheels, open the bypass valve before using a
handwheel.
If manual operation is required, the actuator should be equipped with a manual handwheel. To manually move the
piston rod with the handwheel, first open the bypass needle valve(key66forsizes25and50,figure8;key92forsizes
60 to 130, figure 13), place the handwheel pointer in the neutral position, and insert the locking pin in the sleeve
assembly (for size 60-130). Then turn the handwheel in the selected direction as indicated on the wheel.
The control valve should be located where i t will be accessible for servicing. Room should be left above and below the
control valve to permit removal of the actuator and valve plug.
Bypass Assembly
The bypass is furnished as shown in figures 5, 7, 8, and 13 only when a handwheel actuator is specified. The bypass
allows the pressure to equalize on either side of the piston, so that the manual actuator can be used to position the
valve.
Flow through the bypass tubing is controlled by an angle needle valve (key 66 for figures 5, 7, and 8; and key 92 for
figure 13), which is operated manually. This valve should be closed when air pressure is being used to operate the
valve.
Three-Way Valve Applications Note
WARNING
To avoid loss of control of process fluid and subsequent personal injury or property damage caused by bursting of
pressure-retaining parts, be sure the cylinder pressure does not exceed 80 psig in high cycle-rate, fast stroking speed,
three-way valve applications.
In three-way valve applications where the actuator fully strokes at a frequency of once per minute or faster, and the
stroking speed is rapid (less than 0.5 seconds per stroke), there is a possibility that the stem can fracture at the plug if
the actuator cylinder pressure is greater than 80 psig. This can cause loss of control of process fluid and further
damage to the actuator. Consideration should be given to the use of high-strength, fatigue-resistant stem materials in
these applications.
Actuator Mounting
Size 25 and 5 0 Actuator Mounting
Thefollowingproceduredescribeshowtomounta585Cactuatorsize25and50onapush-down-to-closevalveso
that the piston stem to valve plug stem connection allows full t ravel and proper shutoff. Key numbers referenced in
the following steps are shown in figures 4 through 8.
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